Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2)

Product Guide

The Lenovo ThinkSystem SR950 server is designed for your most demanding, mission-critical workloads,
such as in-memory databases, large transactional databases, batch and real-time analytics, ERP, CRM, and
virtualized server workloads. Now supporting second-generation Intel Xeon Scalable Family processors, the
powerful 4U ThinkSystem SR950 can grow from two to eight processors, and with 96 DIMM sockets,
supports up to 24 TB of high-speed memory. The SR950 also now supports Intel Optane DC Persistent
Memory for the ultimate in performance. The modular design of SR950 speeds upgrades and servicing with
easy front or rear access to all major subsystems to maximize server availability.
The SR950 packs numerous fault-tolerant and high-availability features into a high-density, 4U rack-
optimized design that reduces the space needed to support massive network computing operations and
simplify servicing.
The following figure shows the Lenovo ThinkSystem SR950.

Figure 1. Lenovo ThinkSystem SR950

Did you know?

The SR950 server supports up to eight processors in a single 4U chassis. You can upgrade from a 2-
socket system to an 8-socket system without having to replace the server enclosure or upgrade to a
physically larger design. The SR950 offers enterprise scalability and advanced RAS features to support the
most demanding mission-critical applications that require 24x7 operations.

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Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 1
Key features
The Lenovo ThinkSystem SR950 server is designed for your most demanding, CPU and memory intensive,
mission-critical workloads, such as in-memory databases, large transactional databases, batch and real-time
analytics, ERP, CRM, and virtualized server workloads. The powerful 4U ThinkSystem SR950 can grow
from two to eight second-generation Intel Xeon Processor Scalable Family CPUs, delivering up to 36% total
performance improvement over the first generation processor (based on Intel internal testing). The modular
design of SR950 speeds upgrades and servicing with easy front and rear access to all major subsystems, to
maximize server uptime.
Scalability and performance
The SR950 offers numerous features to boost performance, improve scalability, and reduce costs:
Supports second-generation Intel Xeon Processor Scalable processors
Dense server offering where up to 8 processors and 96 DIMMs are housed in only 4U of rack space.
Offers a simple upgrade path that enables the server to be initially configured with as few as two
processors and then later be upgraded to up to eight processors simply by adding a compute tray and
system boards.
Supports the Gold and Platinum level processors in the Intel Xeon Processor Scalable
Family, including the "top bin" highest-performing 205 W processors available from Intel.
Up to eight processors, each with up to 28 cores and 56 threads (for a total of up to 448 threads) to
maximize the concurrent execution of multithreaded applications.
Intelligent and adaptive system performance with Intel Turbo Boost Technology 2.0 allows processor
cores to run at maximum speeds during peak workloads by temporarily exceeding processor TDP.
Intel Hyper-Threading Technology boosts performance for multithreaded applications by enabling
simultaneous multithreading within each processor core, up to two threads per core.
Intel Virtualization Technology integrates hardware-level virtualization hooks that allow operating
system vendors to better use the hardware for virtualization workloads.
Intel Speed Select Technology provides improvements in server utilization and guaranteed per-core
performance service levels with more granular control over processor performance.
Intel Deep Learning Boost (Vector Neural Network Instruction set or VNNI) is designed to deliver
significant, more efficient Deep Learning (Inference) acceleration for high-performance Artificial
Intelligence (AI) workloads.
Intel Advanced Vector Extensions 512 (AVX-512) enable acceleration of enterprise-class workloads,
including databases and enterprise resource planning (ERP).
Support for up to 96 TruDDR4 DIMMs operating at up to 2933 MHz means you have the fastest
available memory subsystem and memory capacity of up to 24 TB using 96x 256 GB 3DS RDIMMs.
Supports 2933 MHz Performance+ memory DIMMs which allow configurations of 2 DIMMs per
channel to operate at the 2933 MHz rated memory speed.
Supports the new Intel Optane DC Persistent Memory; up to 48 Data Center Persistent Memory
Modules (DCPMMs) can be installed in conjunction with regular system memory. DCPMMs are up to
512 GB each, for a total of up to 24 TB of Persistent Memory.
With both Persistent Memory and RDIMMs installed, the server supports up to a total of 36 TB of
memory, 24 TB of Persistent Memory + 12 TB of regular system memory.
Up to 24x 2.5-inch HDDs or SSDs provide a flexible and scalable all-in-one platform to meet your
increasing demands.
Of the 24x drive bays, support for up to 12 NVMe PCIe SSDs maximizes drive I/O performance, in
terms of throughput, bandwidth, IOPS, and latency.
The use of solid-state drives (SSDs) instead of, or along with, mechanical hard disk drives (HDDs),
can improve I/O performance. An SSD can support up to 100 times more I/O operations per second

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 (IOPS) than a typical HDD.
New high-speed RAID controllers provide 12 Gb SAS connectivity to the drive backplanes. A variety
of RAID adapters are available, with cache up to 8 GB and support for 12 drives on a single
controller.
Supports the Lenovo-patented M.2 adapter design for convenient operating system boot functions.
Available M.2 adapters support either one M.2 drive, or two M.2 drives in a RAID 1 configuration, for
the boot drive performance and reliability.
The server has a dedicated flexible LAN-on-motherboard (LOM) slot offering a variety of 10 GbE or
Gigabit Ethernet adapters that do not occupy one of the standard PCIe slots.
A total of up to 17 rear-accessible PCIe slots: 14 general-purpose PCIe 3.0 slots plus slots dedicated
to the LOM adapter and two ML2 adapters. In addition, the server has two internal slots for RAID or
HBA adapters.
The server offers PCI Express 3.0 I/O expansion capabilities that improve the theoretical maximum
bandwidth by almost 100% (8 GTps per link using 128b/130b encoding) compared to the previous
generation of PCI Express 2.0 (5 GTps per link using 8b/10b encoding).
Availability and serviceability
The SR950 is based on a modular service model where all components and options can be removed from
the front or rear of the system, even parts that are located in the center of the machine such as fans,
memory DIMMs, and processors. The SR950 is designed for 99.99% availability.
Watch the following video to show how easy it is to service the SR950 server:
https://lenovopress.com/lp0899-thinksystem-sr950-ease-of-service-video
The SR950 provides many features to simplify serviceability and increase system uptime:
The server offers Single Device Data Correction (SDDC, also known as Chipkill), Adaptive Double-
Device Data Correction (ADDDC, also known as Redundant Bit Steering or RBS), memory mirroring,
and memory rank sparing for redundancy in the event of a non-correctable memory failure.
The server offers hot-swap drives, supporting RAID redundancy for data protection and greater
system uptime.
The Dual M.2 Boot Adapter uses RAID-1 so that the two M.2 drives installed are configured as a
redundant pair.
The server has up to four hot-swap N+N redundant power supplies to help keep the server
operational in the event of a power supply or utility supply failure.
Each compute tray has 6 hot-swap N+1 redundant fans (a total of 12 fans when two compute trays
are installed) to maximize availability for business-critical applications.
The power source-independent light path diagnostics functionality provides individual light path LEDs
that lead the technician to failed (or failing) components, which simplifies servicing, speeds up
problem resolution, and helps increase system availability.
The included LCD system information display panel provides greater diagnostic function by listing all
error messages and VPD data needed for a service call, thereby speeding problem resolution and
increasing system uptime.
Proactive Platform Alerts (including PFA and SMART alerts): Processors, voltage regulators, memory,
internal storage (SAS/SATA HDDs and SSDs, NVMe SSDs, M.2 storage, and flash storage
adapters), fans, power supplies, RAID controllers, ambient temperature, and subcomponent
temperatures. Alerts can be surfaced through the XClarity Controller to managers such as Lenovo
XClarity Administrator, VMware vCenter, and Microsoft System Center. These proactive alerts let you
take appropriate actions in advance of possible failure, thereby increasing server uptime and
application availability.
Solid-state drives (SSDs) offer more reliability than mechanical HDDs for greater uptime.
The built-in XClarity Controller continuously monitors system parameters, triggers alerts, and

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 performs recovery actions in case of failures to minimize downtime.
Built-in diagnostics in UEFI, using Lenovo XClarity Provisioning Manager, speed up troubleshooting
tasks to reduce service time.
Lenovo XClarity Provisioning Manager supports diagnostic functions and collects service data to USB
key drive or remote CIFS share folder for troubleshooting, to reduce servicing time.
Auto-restart in the event of a momentary loss of AC power (based on power policy setting in the
XClarity Controller service processor).
Support for the XClarity Administrator Mobile app running on a supported smartphone and connected
to the server through the service-enabled USB port, enables additional local systems management
functions.
Three-year or one-year customer-replaceable unit and onsite limited warranty, 9 x 5 next business
day. Optional service upgrades are available.
Manageability and security
Powerful systems management features simplify local and remote management of the SR950:
The server includes an XClarity Controller (XCC) to monitor server availability and perform remote
management. XCC Enterprise is included as standard, which enables remote KVM and remote media
files (ISO and IMG image files), boot capture, and power capping.
Lenovo XClarity Administrator offers comprehensive hardware management tools that help to
increase uptime, reduce costs, and improve productivity through advanced server management
capabilities.
New UEFI-based Lenovo XClarity Provisioning Manager, accessible from F1 during boot, provides
system inventory information, graphical UEFI Setup, platform update function, RAID Setup wizard,
operating system installation function, and diagnostic functions.
Support for Lenovo XClarity Energy Manager which captures real-time power and temperature data
from the server, and provides automated controls to lower energy costs.
Integrated Trusted Platform Module (TPM) 2.0 support enables advanced cryptographic functionality,
such as digital signatures and remote attestation.
Supports Secure Boot to ensure that only a digitally signed operating system can be used. Supported
with HDDs and SSDs as well as M.2 drives in the M.2 Adapter.
Industry-standard Advanced Encryption Standard (AES) NI support for faster, stronger encryption.
Intel Execute Disable Bit functionality can prevent certain classes of malicious buffer overflow attacks
when combined with a supported operating system.
Intel Trusted Execution Technology provides enhanced security through hardware-based resistance
to malicious software attacks, allowing an application to run in its own isolated space, protected from
all other software running on a system.
Energy efficiency
The SR950 offers the following energy-efficiency features to save energy, reduce operational costs, and
increase energy availability:
The server can be used in environments up to ASHRAE A4 with ambient temperatures up to 45 °C.
The server is Energy Star 3.0 compliant.
Energy-efficient planar components help lower operational costs.
High-efficiency power supplies with 80 PLUS Platinum certifications
Intel Intelligent Power Capability powers individual processor elements on and off as needed, to
reduce energy draw.
Low-voltage 1.2 V DDR4 memory offers energy savings compared to 1.35 V and 1.5 V DDR3 DIMMs.

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 Solid-state drives (SSDs) consume as much as 80% less power than mechanical 2.5-inch HDDs.
The server uses hexagonal ventilation holes, which can be grouped more densely than round holes,
providing more efficient airflow through the system.
Optional Lenovo XClarity Energy Manager provide advanced data center power notification, analysis,
and policy-based management to help achieve lower heat output and reduced cooling needs.

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Components and connectors
The following figure shows the front of the SR950 server.

Figure 2. Front view of the Lenovo ThinkSystem SR950

The following figure shows the rear of the SR950 server. The server has up to 17 PCIe slots, depending on
the riser cards selected, and the number of processors installed.

Figure 3. Rear view of the Lenovo ThinkSystem SR950

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The processors and other components are located on compute trays, the Upper Compute Tray and the
Lower Compute Tray. Each compute tray holds up to four processors on two system boards. The compute
trays are accessible from the front of the server, as shown in the following figure.

Figure 4. Lower Compute Tray partially removed

The server has one or two compute trays. Each compute tray contains:
One or two compute system boards, each comprising:
Two processors
24 DIMMs
Six hot-swap fans, accessible even when the compute tray is installed
12x 2.5-inch hot-swap drive bays
One PCIe slot reserved for a RAID adapter for internal SAS/SATA drives
The following figure shows the rear of the compute tray with its two compute system boards, one of
them removed.

Figure 5. Compute tray with two compute system boards

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The compute system board is shown in the following figure. Each system board holds two processors and
24 DIMM sockets, 12 per processor. The system board also has connections for the NVMe ports used to
connect to the PCIe NVMe drive bays at the front of the server.

Figure 6. Compute system board

Processors installed in the compute system boards are numbered as shown in the following figure.

Figure 7. Processor numbering (viewed from the rear of the compute trays)
For some four-socket storage-rich configurations, a storage tray is used in the upper tray area instead of a
compute tray. The following figure shows the key components of the storage tray.

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Figure 8. Storage tray
All slots and ports at the rear of the server are housed in the I/O tray as shown in the following figure.

Figure 9. I/O tray

System architecture
The following figure shows the architecture of the SR950 at a high level. The system boards with processors
and memory are installed in compute trays along with the drive bays and storage adapter. The I/O board
houses all onboard PCIe slots as well as the slots for the riser cards the offer the remaining PCIe slots.

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Figure 10. SR950 architecture
The specific connections between system boards, processors and PCIe slots are dependent on the server
configuration. This is described in detail in the Server configurations section. Specific processor-slot
connections based on each configuration are described in the Slot availability by server configuration
section.
The following figure shows System board 1 where processors 1 and 2 are installed. The slots on the I/O
board are connected directly to these processors (or indirectly through the Intel C624 Platform Controller
Hub, PCH).

Figure 11. System board 1 connections to the I/O board

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The processors within the chassis communicate via UltraPath Interconnect (UPI) ports. These ports allow
high speed communication between the CPUs. UPI replaces the Intel QuickPath Interconnect (QPI). One
UPI link connects the two processors on each system board (UPI 3) and the other two UPI links are used to
connect the other processors in adjacent boards to form four-way and larger systems.
In four-processor configurations, the design of the UPI links is either in a mesh or a ring topology. When a
processor has 3 UPI ports, it can be used in a 4-socket mesh configuration where all processors are directly
connected to every other processor. 5200 Series processors only have 2 UPI ports (ports 1 and 2) and
therefore do not support mesh topology. These two UPI configurations are shown in the following figure.

Figure 12. Mesh (left) and Ring (right) topologies for four-socket configurations
Ring topology with 8200 Series processors: As discussed in the Server configurations section, the “Four-
Socket Upgradable / Storage Rich” configuration is a four-socket configuration that uses a Ring topology but
uses 8200 Series processors.
The server supports an 8-socket configuration (8200 Series processors required). The following figure shows
the UPI links used to connect eight processors.

Figure 13. 8-socket topology

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Refer to the processor options table for information on the number UPI links each processor option has for
the SR950 system.

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Server configurations
The SR950 supports five different configurations, depending on the desired number of processors, drive
bays, PCIe slots, and upgradability to an 8-socket configuration.
Notes:
The configurations listed here represent Lenovo's recommendations regarding the selection of
compute system boards, I/O riser cards, and NVMe drive bays to maximize the available resources.
You can select fewer drives and lower slot counts by using lower-slot-count riser cards to meet
application requirements.
The use of only two, three or six processors in configurations where supported will reduce the
available I/O slots and NVMe drive bays. This is described in details in the Internal storage section
and the I/O expansion options section.
Configurations 1 and 2 support either two, three or four processors, however the use 5200 Series
processors requires that four processors be selected. Two or three 5200 Series processors are not
supported in these configurations due to the way the processors are connected.
Configurations 3 and 4 are designed to be easily upgradable to 8 processors. As a result, 8200 Series
processors are required.
When building a server in the configurator, the feature codes in the following table are key to selecting the
right configuration.

Table 1. Feature codes for selecting base server configurations

Part Feature
number code Description
CTO only BMQC SR950 2S to 8S Base v2 (Upgrade to 8S using the 4S Performance to 8S upgrade
kit)
CTO only AUNY SR950 2S to 4S Base (Upgrade to 8S using the 4S Performance to 8S upgrade kit)
CTO only BMQE SR950 2S to 4S Base v2 (Simple upgrade without needing the upgrade kit)
CTO only AUKF SR950 2S to 8S Base (Simple upgrade without needing the upgrade kit)
CTO only AX3Y 12 Hard Drive Maximum System
CTO only AX3Z 24 Hard Drive Maximum System

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 Upgrades: Configurations 1-4 can be upgraded to an 8-socket configuration (Configuration 5) as
described in the Server configuration upgrades section.

Table 2. Server configurations

Configuration 1. Four-Socket Performance

The highest-performing 4-socket server, at the lowest

cost, when up to 12 drives is enough, and without the
need for a simple upgrade.

Supports 2, 3 or 4 processors (if using 5200

Series processors, 4 processors must be
selected).
4 sockets configured in mesh topology for best
performance.
12 drive bays, 6 of which support NVMe drives (4
NVMe with 3 processors, and 2 NVMe with 2
processors).
15 rear PCIe slots with 4 processors (10 rear
slots with 3 processors, and 6 rear slots with 2
processors).
Filler installed in the upper tray area.
Can be upgraded to 8S but requires the 4S
Performance to 8S Upgrade Kit, additional
components, and Lenovo hardware installation.
Select feature codes AUNY and AX3Y.

Configuration 2. Four-Socket Performance/ Storage

Rich

The highest-performing 4-socket server, when needing

more than 12 drives without the need for a simple
upgrade.

Supports 2, 3 or 4 processors (if using 5200

Series processors, 4 processors must be
selected).
4 processors configured in mesh topology for
best performance.
24 drives, 12 of which support NVMe drives (8
NVMe with 3 processors, and 4 NVMe with 2
processors).
13 rear PCIe slots with 4 processors (9 rear slots
with 3 processors, and 5 rear slots with 2
processors).
Storage tray installed in the upper tray area.
Can be upgraded to 8S but requires the 4S
Performance to 8S Upgrade Kit, additional
components, and Lenovo hardware installation.
Select feature codes AUNY and AX3Z.

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 Configuration 3. Four-Socket Upgradable

The lowest-cost 4-socket server capable of a simple

upgrade to 8 socket, and when 12 drive bays with 4
processors is enough storage.

2 or 4 processors, must be 8200 Series

processors.
4 processors in a ring topology.
12 drive bays including up to 6 NVMe (2 NVMe
with 2 processors).
Up to 15 rear PCIe slots with 4 processors (6 rear
slots with 2 processors).
Filler installed in the upper tray area.
Upgradable to 8-socket with an additional
compute tray and two system boards.
Once upgraded, the system will have 24 drive
bays.
Select feature codes AUKF and AX3Y.

Configuration 4. Four-Socket Upgradable / Storage

Rich

4-socket server capable of a simple upgrade to 8-socket,

and needing more than 12 drive bays with 4 processors.

Requires 4 processors, must be 8200 Series.

4 processors in a ring topology.
24 drive bays (including up to 4 NVMe).
10 rear PCIe slots.
Two compute trays, with one system board in
each tray.
Upgradable to 8-socket with two additional
system boards.
Once upgraded, the server will support 12 NVMe
drives.
Select feature codes AUKF and AX3Z.

Configuration 5. Eight-Socket Storage Rich

Full featured 6- or 8-socket server with up to 24 drive

bays, and the maximum number of PCIe x16 slots.

Requires 6 or 8 processors, must be 8200 Series.

24 drive bays, 12 of which support NVMe drives
(8 NVMe with 6 processors).
17 rear PCIe slots (13 rear slots with 6
processors installed).
Two compute trays each with two system boards.
Select feature codes AUKF and AX3Z.

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The following table summarizes the configurations.

Table 3. SR950 server configurations

Maximum
Supported Processor Maximum PCIe Upgrade to
Configuration processors Lower Tray Upper Tray Topology storage slots 8S?
4S 2 or 4 Compute Tray Filler 4S Mesh* 12 drives 15 Yes‡
Performance Any (6 NVMe)
processor†
4S 4 Compute Tray Storage Tray 4S Mesh* 24 drives 13 Yes‡
Performance/ Any processor (12
Storage Rich NVMe)
4S Upgradable 2 or 4 Compute Tray Filler 4S Ring 12 drives 15 Yes**
8200 Series (6 NVMe)
only
4S 4 Compute Tray Compute Tray 4S Ring 24 drives 10 Yes**
Upgradable/ 8200 Series with 1 system with 1 system (4 NVMe)
Storage Rich only board board
8S Storage 8 Compute Tray Compute Tray 8S 24 drives 17 Not
Rich 8200 Series (12 applicable
only NVMe)
† If using 5200 Series processors, then 4 processors must be selected. Using two 5200 Series processors is
not supported.
* Mesh topology requires a processor with 3 UPI connections; Processors such as the 5200 series with only
2 UPI connections will operate in Ring topology. See the table in the Processor options section.
‡ Upgrade requires the ThinkSystem SR950 4S Performance to 8S Upgrade Kit, 4TA7A10969. See the
Server configuration upgrades section below.
** After upgrade, maximum storage will be 24 drives (12 NVMe), and up to 17 total PCIe slots available (may
require replacement riser cards)
For details about PCIe slot availability based on each server configuration, see Slot availability by server
configuration.

Server configuration upgrades

This section describes the system upgrades you can perform in the field. The upgrades are based on the
configurations that are described in the Server configurations section.
Key components in the upgrades are listed in the following table.

Table 4. System upgrades

Part number Feature code Description
4TA7A10969 Various ThinkSystem SR950 4S Performance to 8S Upgrade Kit
7XG7A03955 B4Y1 ThinkSystem SR950 2-CPU, 24 DIMM Compute System Board
4C87A80579 Various ThinkSystem SR950 Upper Compute Tray Kit with 19k fans, 6-8S Upgrade Gen2 v2
4C87A37049 Various ThinkSystem SR950 Upper Compute Tray Kit with 19k fans, 6-8S Upgrade Gen2

4S Performance to 8S Upgrade Kit, 4TA7A10969, includes the following components:

4 mid-plane UPI & sideband interconnects
The Compute System Board option, 7XG7A03955, includes the following components:
One compute system board v2, without processors or memory

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The Upper Compute Tray Kit, 4C87A37049, includes the following components:
1x compute tray with 12 drive bays and 1 slot for storage adapter
6x 19K RPM system fans
1x compute system board
3x 4-bay drive bay fillers
Note: The Upper Compute Tray Kit does not include drive backplanes
The following table describes the before and after configurations and the components you will need to order
to achieve the desired configuration.

Table 5. Upgrades to Server configurations (See Server configurations section for configuration definitions)
Initial configuration Desired upgraded configuration Parts to order and install
Configuration 1 Configuration 1 1x Compute System Board, 7XG7A03955
(Four-Socket Performance) (Four-Socket Performance) 2x processor options (match installed)
2 processors installed 4 processors installed Memory DIMMs (matching installed is
recommended)

Configuration 1 Configuration 1 1x processor option (match installed)

(Four-Socket Performance) (Four-Socket Performance) Memory DIMMs (matching installed is
3 processors installed 4 processors installed recommended)

Configuration 1 Configuration 5 1x 4S Performance to 8S Upgrade Kit,

(Four-Socket Performance) (Eight-Socket Storage Rich) 4TA7A10969
4 processors installed 8 processors installed 1x Upper Compute Tray Kit v2,
4C87A37049*
(Includes SAP HANA 1x Compute System Board, 7XG7A03955
models and configurations) 4x 82xx processor options (match
installed)**
Configuration 2 Configuration 5 Memory DIMMs (matching installed is
(Four-Socket Performance/ (Eight-Socket Storage Rich) recommended)
Storage Rich) 8 processors installed Drive backplanes for upper compute tray
4 processors installed RAID adapter or HBA for upper compute
(Includes customized SAP tray
HANA models) Drives for upper compute tray
Additional/replacement PCIe riser cards
Lenovo Basic Hardware Installation
services

Configuration 2 Configuration 2 1x Compute System Board, 7XG7A03955

(Four-Socket Performance/ (Four-Socket Performance/ 2x processor options (match installed)
Storage Rich) Storage Rich) Memory DIMMs (matching installed is
2 processors installed 4 processors installed recommended)

Configuration 2 Configuration 2 1x processor option (match installed)

(Four-Socket Performance/ (Four-Socket Performance/ Memory DIMMs (matching installed is
Storage Rich) Storage Rich) recommended)
3 processors installed 4 processors installed
Configuration 3 Configuration 3 1x Compute System Board, 7XG7A03955
(Four-Socket Upgradable) (Four-Socket Upgradable) 2x processor options (match installed)
2 processors installed 4 processors installed Memory DIMMs (matching installed is
recommended)

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Initial configuration Desired upgraded configuration Parts to order and install
Configuration 3 Configuration 5 1x Upper Compute Tray Kit v2,
(Four-Socket Upgradable) (Eight-Socket Storage Rich) 4C87A37049*
4 processors installed 8 processors installed 1x Compute System Board, 7XG7A03955
4x 82xx processor options (match
installed)*
Memory DIMMs (matching installed is
recommended)
Drive backplanes for upper compute tray
RAID adapter or HBA for upper compute
tray
Drives for upper compute tray
Additional/replacement PCIe riser cards

Configuration 4 Configuration 5 2x Compute System Board, 7XG7A03955

(Four-Socket Upgradable / (Eight-Socket Storage Rich) 4x 82xx processor options (match
Storage Rich) 8 processors installed installed)**
4 processors installed Memory DIMMs (matching installed is
recommended)
Additional/replacement PCIe riser cards

Configuration 5 Configuration 5 2x processor option (match installed)

(Eight-Socket Storage (Eight-Socket Storage Rich) Memory DIMMs (matching installed is
Rich) 8 processors installed recommended)
6 processors installed
* The Upper Compute Tray Kit includes 1x Compute System Board
** 8-socket configurations must use Intel Xeon Platinum (82xx) processors
Configuration notes:
The added processors must match the processors already installed.
When upgrading to Configuration 5 (8-socket configuration), Platinum-level (82xx) processors must
be used, as listed in the Processor options section. Gold processors do not support 8-socket
configurations.
For best performance, each processor added should match the memory configuration of existing
processors (number & size of DIMMs)
The ThinkSystem SR950 4S Performance to 8S Upgrade Kit, 4TA7A10969, contains the mid-chassis
interconnects needed for an 8-socket configuration, replacing the existing interconnects. Lenovo
installation is highly recommended due to the complexity of this upgrade. Installation cost will vary
depending on location and scope of work.

SR950 upgrades from first-generation processors

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SR950 upgrades from first-generation processors
It is supported to upgrade an SR950 server with first-generation Intel Xeon Scalable processors to second-
generation processors.
The process is as follows:
1. Order up to 8 processor options to replace the processors you have installed. If desired, order Intel
Optane DC Persistent Memory modules.
2. Before swapping hardware, upgrade all system firmware to the latest levels, 19A or later
3. Replace the processors
4. Install Intel Optane DC Persistent Memory (if ordered)
Note: The ASHRAE support and environmental restrictions as outlined in the SR950 (Xeon SP Gen 1)
product guide still apply to an upgraded server. See the following link for details:
https://lenovopress.com/lp0647#operating-environment

Standard specifications
The following table lists the standard specifications.

Table 6. Standard specifications

Components Specification
Machine type 7X11 - 1-year warranty
7X12 - 3-year warranty
7X13 - SAP HANA configurations with 3-year warranty
Form factor 4U rack
Processor Up to eight second-generation Intel Xeon Platinum Scalable Processors or up to four second-
generation Intel Xeon Gold Scalable Processors (formerly codenamed "Cascade Lake"). Supports
processors with up to 28 cores, core speeds up to 3.8 GHz, and TDP ratings up to 205W.

Processors and memory are located on system boards installed in compute trays: 2 processors per
system board, 2 system boards per compute tray, and 2 compute trays in the server.

Chipset Intel C624 chipset (formerly codenamed "Lewisburg")

Memory Up to 96 DIMM sockets (12 DIMMs per processor, installed on each system board). Lenovo
TruDDR4 RDIMMs, LRDIMMs and 3DS RDIMMs are supported. Each processor has 6 memory
channels, with 2 DIMMs per channel. DIMM slots are shared between standard system memory and
persistent memory. DIMMs are available in three speeds: 2666 MHz, 2933 MHz and Performance+
2933 MHz. Performance+ DIMMs support 2933 MHz with two DIMMs installed per channel (2DPC),
whereas 2933 MHz DIMMs support 2933 MHz with only 1 DIMM per channel (1DPC).
Persistent Supports up to 48 Intel Optane DC Persistent Memory modules (DCPMMs) installed in the DIMM
memory slots. Persistent memory is installed in combination with system memory DIMMs. Runs at 2666
MHz.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 19

Components Specification
Memory With system memory DIMMs: Up to 24TB with 96x 256GB 3DS RDIMMs and eight
maximums processors (3TB per processor)
With Persistent Memory in memory mode: Up to 24TB of Persistent Memory with 48x
512GB Intel Optane DC Persistent Memory modules and eight processors (3TB per
processor)
With Persistent Memory in AppDirect mode: Up to 36TB total memory (24TB of Persistent
Memory using 48x 512GB DCPMMs + 12TB of system memory using 48x 256GB 3DS
RDIMMs and eight processors) (4.5TB per processor)

Note: Support of more than 1TB per processor (more than 4TB for a 4-processor system or 8TB for
an 8-processor system) requires M-suffix or L-suffix processors. M-suffix processors support up to
2TB of memory per processor. L-suffix processors support up to 4.5TB of memory per processor.
These calculations include any Persistent Memory installed. See the Processor options section for
information.

Memory ECC, SDDC (for x4-based memory DIMMs), ADDDC (for x4-based memory DIMMs), memory
protection mirroring, and memory sparing.
Disk drive Up to 24x 2.5" hot-swap SAS/SATA drive bays. With AnyBay backplanes, 12 bays can be
bays configured to support PCIe NVMe drives.
Maximum 737.28TB using 24x 30.72TB 2.5-inch SAS/SATA SSDs
internal 96TB using 12x 8TB 2.5-inch NVMe SSDs
storage 57.6TB using 24x 2.4TB 2.5-inch HDDs

Storage No embedded RAID

controller 12 Gb SAS/SATA RAID adapters:
RAID 530i (cacheless) supports RAID 0, 1, 10, 5, 50
RAID 730-8i with 1GB cache supports RAID 0, 1, 10, 5, 50
RAID 730-8i with 2GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60
RAID 930-8i with 2GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60
RAID 930-16i with 4GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60
RAID 940-8i with 4GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60
RAID 940-16i with 4GB or 8GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6,
60
12 Gb SAS/SATA non-RAID:
430-8i or 440-8i HBAs
430-16i or 440-16i HBAs

Optical and No internal bays.

tape bays
Network Integrated 10Gb Ethernet controller, based on the Intel Ethernet Connection X722. The server
interfaces supports 1 of 6 available LOM adapters, providing either 2- or 4-port Gigabit Ethernet, 2- or 4-port
10 GbE with SFP+ connections or 2- or 4-port 10 GbE with RJ45 connections. One port can
optionally be shared with the XClarity Controller (XCC) management processor for Wake-on-LAN
and NC-SI support. 1 or 2 ML2 adapter slots for additional network adapters.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 20

Components Specification
PCI Up to 17 PCIe 3.0 rear-accessible slots:
Expansion
slots Slots 1-4 on a riser, one of:
Riser with 4x PCIe 3.0 x16 slots, all full-height half-length, all 75W
Riser with 2x PCIe 3.0 x16 slots, all full-height half-length, both 75W
Riser with 4x PCIe 3.0 x8 slots, full-height half-length, all 75W
Slot 5: PCIe 3.0 x16, low-profile, 75W
Slot 6: PCIe 3.0 x16, low-profile, 75W
Slot 7: PCIe 3.0 x8, low-profile, 75W
Slot 8: PCIe 3.0 x16 ML2, low-profile (supports NC-SI)
Slot 9: PCIe 3.0 x8 LOM adapter slot, low-profile (supports NC-SI)
Slots 10-15 on a riser, one of:
Riser 5x16+ML2:
Five PCIe 3.0 x16 slots, all full-height half-length, all 75W
One PCIe 3.0 x16 ML2 slot, full-height half-length, 30W (no NC-SI support)
Riser 2x16: Two PCIe 3.0 x16 slots, all full-height half-length, both 75W
Riser 4x8: Four PCIe 3.0 x8 slots, full-height half-length, all 75W
Slot 16-17 on a riser:
PCIe 3.0 x8 low profile, 75W
PCIe 3.0 x8 low profile, 75W

Additional internal PCIe slots:

One or two PCIe 3.0 x8 slots for storage adapters

M.2 adapter slot

Ports Front: Two USB 2.0 ports (one also for XCC local management), and one VGA video port.
Rear: Two USB 3.0, one VGA video, one DB-9 serial, and one 1 GbE RJ-45 systems
management. The serial port can be shared with the XCC for serial redirection functions. Only one
VGA port can be used at a time.
Cooling Up to 12 redundant hot-swap single-rotor fans, 6 in each compute tray. Each tray has N+1 fan
redundancy.
Power supply Up to four redundant hot-swap 1100 W or 1600 W power supplies (80 PLUS Platinum certified),
supporting 200-240 V AC input. The 1100 W power supply also supports 100-127V AC input supply
with a reduced capacity of 1050 W. No support for 240 V DC.
Hot-swap Drives, power supplies, and fans.
parts
Video G200 graphics with 16 MB memory with 2D hardware accelerator, integrated into the XClarity
Controller. Maximum resolution is 1920x1200 32bpp at 60Hz.
Security Power-on password, administrator's password, Trusted Platform Module (TPM), supporting TPM 1.2
features or TPM 2.0. In China only, optional Trusted Cryptographic Module (TCM).
Systems XClarity Controller embedded management, XClarity Administrator centralized infrastructure
management delivery, XClarity Integrator plugins, and XClarity Energy Manager centralized server power
management. XClarity Controller Enterprise functionality standard with the SR950. Light path
diagnostics for local failure detection and reporting, with LCD diagnostic pull-out panel.
Operating Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi.
systems See the Operating systems section for specifics.
Limited One year or three-year (model dependent) customer-replaceable unit (CRU) and onsite limited
warranty warranty with 9x5 next business day (NBD).
Service and Optional service upgrades are available through Lenovo Services: 4-hour or 2-hour response time,
support 6-hour fix time, 1-year or 2-year warranty extension, software support for Lenovo hardware and
some third-party applications.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 21

Components Specification
Dimensions Width: 447 mm (17.6 in.), height: 176 mm (6.9 in.), depth: 851 mm (33.5 in.). SeePhysical and
electrical specifications for details.
Weight Minimum configuration: 32.6 kg (71.9 lb.), Maximum configuration: 58.7 kg (129.4 lb.)

The server is shipped with the following items:

Rail kit
Documentation flyer
Power cords (model and region dependent)

Models
ThinkSystem SR950 models can be configured by using the Lenovo Data Center Solution Configurator
(DCSC).
Configure-to-order (CTO) models are used to create models with factory-integrated server customizations.
For CTO models, two types of base CTO models are available for the SR950 as listed in the columns in the
following table:
General purpose base CTO models are for general business (non-HPC) and is selectable by
choosing General Purpose mode in DCSC.
AI and HPC base models are intended for Artificial Intelligence (AI) and High Performance Computing
(HPC) configurations and solutions are enabled using the AI & HPC Hardware - ThinkSystem
Hardware mode in DCSC. These configurations, along with Lenovo EveryScale Solutions, can also
be built using System x and Cluster Solutions Configurator (x-config) . Tip: Some HPC and AI models
are not listed in DCSC and can only be configured in x-config.
Preconfigured server models may also be available for the SR950, however these are region-specific; that
is, each region may define their own server models, and not all server models are available in every region.
The following table lists the base CTO models of the ThinkSystem SR950 server.

Table 7. Base CTO models

Machine Machine
Type/Model Type/Model
General purpose for AI and HPC Description
7X12CTO1WW 7X12CTOLWW ThinkSystem SR950 – 3-year warranty
7X11CTO1WW 7X11CTOLWW ThinkSystem SR950 – 1-year warranty
7X13CTO1WW None ThinkSystem SR950 – SAP HANA configurations with 3-year
warranty

The following tables list the available models, grouped by region.

Models for Australia and New Zealand
Models for South East Asian regions (ASEAN)
Models for EMEA regions
Models for India
Models for Japan
Models for USA and Canada
Refer to the Specifications section for information about standard features of the server.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 22

Common to all models:
All models include a rail kit.

Models for Australia and New Zealand

Table 8. Models for Australia and New Zealand

Intel Xeon Comp. Power Power
Model processors† trays Memory RAID Drive bays Drives LOM Slots* supplies cords
7X12 4x Gold 5220 18C 1 4x 32GB 1x 8x 2.5" Open Open 11 2x 1600W 2.8m
A02UAU 125W 2.2GHz 2933MHz RAID (4x AnyBay) (2,0,0,1) HS C13-C14
930-8i 10A
7X12 2x Gold 6230 20C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02WAU 125W 2.1GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6230 20C 1 2x 32GB 1x 8x 2.5" Open Open 5 2x 1100W 2.8m
A02NAU 125W 2.1GHz 2933MHz RAID (2x AnyBay) (0,0,0,0) HS C13-C20
930-8i
7X12 2x Gold 6240 18C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02GAU 150W 2.6GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6242 16C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02JAU 150W 2.8GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6242 16C 1 4x 32GB 1x 12x 2.5" Open Open 5 2x 1600W 2.8m
A02VAU 150W 2.8GHz 2933MHz RAID (0,0,0,0) HS C13-C14
930-16i 10A
7X12 2x Gold 6244 8C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02LAU 150W 3.6GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6248 20C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A031AU 150W 2.5GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6252 24C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02ZAU 150W 2.1GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6254 18C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A029AU 200W 3.1GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 4x Platinum 8253 1 4x 32GB 1x 8x 2.5" Open Open 11 2x 1600W 2.8m
A02RAU 16C 125W 2933MHz RAID (4x AnyBay) (2,0,0,1) HS C13-C14
2.2GHz 930-8i 10A
7X12 2x Platinum 8260 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02BAU 24C 165W 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2.4GHz 2933MHz 930-16i
7X12 8x Platinum 8260 2 8x 32GB 2x 24x 2.5" Open Open 17 4x 1600W 2.8m
A02XAU 24C 165W 2933MHz RAID (12x AnyBay) (0,0,2,1) HS C13-C14
2.4GHz 930-16i 10A
7X12 2x Platinum 8270 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02FAU 26C 205W 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2.7GHz 2933MHz 930-16i
7X12 2x Platinum 8280 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02SAU 28C 205W 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2.7GHz 2933MHz 930-16i
† Processor detail: Quantity, model, core count, TDP, core frequency
* Values in brackets are numbers of riser cards: (A,B,C,D) where A=2x16 Riser, B=4x8 Riser, C=5x16+ML2
Riser, D=2x8 Riser

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 23

Models for South East Asian regions (ASEAN)

Table 9. Models for South East Asian regions (ASEAN)

Intel Xeon Comp. Power Power
Model processors† trays Memory RAID Drive bays Drives LOM Slots* supplies cords
7X12 2x Gold 6230 20C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02WSG 125W 2.1GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6240 18C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02GSG 150W 2.6GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6242 16C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02JSG 150W 2.8GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6244 8C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02LSG 150W 3.6GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6248 20C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A031SG 150W 2.5GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6252 24C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02ZSG 150W 2.1GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Gold 6254 18C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A029SG 200W 3.1GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Platinum 8260 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02BSG 24C 165W 2.4GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Platinum 8270 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02FSG 26C 205W 2.7GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
7X12 2x Platinum 8280 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W None
A02SSG 28C 205W 2.7GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS
2933MHz 930-16i
† Processor detail: Quantity, model, core count, TDP, core frequency
* Values in brackets are numbers of riser cards: (A,B,C,D) where A=2x16 Riser, B=4x8 Riser, C=5x16+ML2
Riser, D=2x8 Riser

Models for EMEA regions

Table 10. Models for EMEA regions

Intel Xeon Comp. Drive Power Power
Model processors† trays Memory RAID bays Drives LOM Slots* supplies cords
7X12 2x Gold 6242 16C 1 4x 32GB 1x 12x 2.5" Open Open 5 2x 1600W 2.8m C13-
A02VEA 150W 2.8GHz 2933MHz RAID (0,0,0,0) HS C14 10A
930-16i
† Processor detail: Quantity, model, core count, TDP, core frequency
* Values in brackets are numbers of riser cards: (A,B,C,D) where A=2x16 Riser, B=4x8 Riser, C=5x16+ML2
Riser, D=2x8 Riser

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 24

Models for India

Table 11. Models for India

Intel Xeon Comp. Power Power
Model processors† trays Memory RAID Drive bays Drives LOM Slots* supplies cords
7X12 2x Gold 6230 20C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A02QSG 125W 2.1GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
7X12 2x Gold 6240 18C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A02HSG 150W 2.6GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
7X12 2x Gold 6242 16C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A02DSG 150W 2.8GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
7X12 2x Gold 6244 8C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A02YSG 150W 3.6GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
7X12 2x Gold 6248 20C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A02PSG 150W 2.5GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
7X12 2x Gold 6252 24C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A02TSG 150W 2.1GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
7X12 2x Gold 6254 18C 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A028SG 200W 3.1GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
7X12 2x Platinum 8260 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A030SG 24C 165W 2.4GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
7X12 2x Platinum 8270 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A02KSG 26C 205W 2.7GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
7X12 2x Platinum 8280 1 2x 16GB 1x 8x 2.5" Open Open 5 2x 1600W 2.8m C13-
A02ESG 28C 205W 2.7GHz 2Rx8 RAID (4x AnyBay) (0,0,0,0) HS C14 13A
2933MHz 930-16i
† Processor detail: Quantity, model, core count, TDP, core frequency
* Values in brackets are numbers of riser cards: (A,B,C,D) where A=2x16 Riser, B=4x8 Riser, C=5x16+ML2
Riser, D=2x8 Riser

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 25

Models for Japan

Table 12. Models for Japan

Intel Xeon Comp. Power Power
Model processors† trays Memory RAID Drive bays Drives LOM Slots* supplies cords
7X12 2x Gold 6230 20C 1 2x 16GB 1x 8x 2.5" Open 4x10Gb 7 2x 1100W None
A02MJP 125W 2.1GHz 2Rx8 RAID (4x AnyBay) RJ45 (0,0,0,1) HS
2933MHz 930-16i
7X12 2x Gold 6254 18C 1 2x 16GB 1x 8x 2.5" Open 4x10Gb 7 2x 1600W None
A02AJP 200W 3.1GHz 2Rx8 RAID (4x AnyBay) RJ45 (0,0,0,1) HS
2933MHz 930-16i
7X12 4x Platinum 8280 2 4x 16GB 1x 8x 2.5" Open 4x10Gb 5 2x 2000W None
A02CJP 28C 205W 2Rx8 RAID (4x AnyBay) RJ45 (0,0,0,0) HS
2.7GHz 2933MHz 930-16i
† Processor detail: Quantity, model, core count, TDP, core frequency
* Values in brackets are numbers of riser cards: (A,B,C,D) where A=2x16 Riser, B=4x8 Riser, C=5x16+ML2
Riser, D=2x8 Riser

Models for USA and Canada

Table 13. Models for USA and Canada

Intel Xeon Comp. Power Power
Model processors† trays Memory RAID Drive bays Drives LOM Slots* supplies cords
7X12A02UNA 4x Gold 5220 1 4x 1x 8x 2.5" Open Open 11 2x 1600W 2.8m
18C 125W 32GB 930-8i (4x AnyBay) (2,0,0,1) HS C13-C14
2.2GHz 2933 10A
7X12A02NNA 2x Gold 6230 1 2x 1x 8x 2.5" Open Open 5 2x 1100W 2.8m
20C 125W 32GB 930-8i (2x AnyBay) (0,0,0,0) HS C13-C20
2.1GHz 2933
7X12A02RNA 4x Platinum 1 4x 1x 8x 2.5" Open Open 11 2x 1600W 2.8m
8253 16C 125W 32GB 930-8i (4x AnyBay) (2,0,0,1) HS C13-C14
2.2GHz 2933 10A
7X12A02XNA 8x Platinum 2 8x 2x 24x 2.5" Open Open 17 4x 1600W 2.8m
8260 24C 165W 32GB 930- (12x AnyBay) (0,0,2,1) HS C13-C14
2.4GHz 2933 16i 10A
† Processor detail: Quantity, model, core count, TDP, core frequency
* Values in brackets are numbers of riser cards: (A,B,C,D) where A=2x16 Riser, B=4x8 Riser, C=5x16+ML2
Riser, D=2x8 Riser

Processors
The SR950 supports second-generation Intel Xeon Scalable processors in the Gold and Platinum levels.
Topics in this section:
Continued support for 1st Gen Intel Xeon Scalable processors
Memory capacity of processors
Processor features
Adding additional processors
UEFI operating modes
The server supports up to four or eight processors, depending on the configuration selected, however
processors are all installed within the 4U rack enclosure:
The use of more than 4 processors requires a Platinum-level processor.
For configurations that support up to eight processors, the server supports 2, 4, 6 or 8 processors.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 26

 For configurations of up to four processors (lower cost configuration, no upgrade path to eight
processors), the server supports 2, 3 or 4 processors.
As described in the Components and connectors section, processors and memory are located on compute
system boards - one or two processors per board. Two system boards are installed in a compute tray, and
there are two compute trays in the server.
The table below lists the supported second-generation Intel processors.

First generation processors: The SR950 also supports first-generation Xeon Scalable processors. For
details, see https://lenovopress.com/lp0647.

All processors listed have the following characteristics:

Second-generation Intel Xeon Scalable processors (formerly codenamed "Cascade Lake")
14 nm process technology
Six DDR4 memory channels
48 PCIe 3.0 I/O lanes
1 MB L2 cache
1.375 MB or more L3 cache per core
Intel Hyper-Threading Technology
Intel Turbo Boost Technology 2.0
Intel Advanced Vector Extensions 512 (AVX-512)
Two or three Intel Ultra Path Interconnect (UPI) links at up to 10.4 GT/s
Some processors include a suffix letter in the processor model number:
L: Large memory tier (supports total memory up to 4.5TB per processor)
M: Medium memory tier (supports total memory up to 2TB per processor)
N: NFV optimized
S: Search optimized
T: High Tcase
U: Single socket
V: VM Density optimized
Y: Speed Select
Processors without a suffix, or those with a suffix other than M or L, support up to 1TB per processor.

B suffix: B is not an official suffix, but instead used by Intel to distinguish between the Xeon Gold 5218
and the Xeon Gold 5218B processors. These two processor models have the same core counts,
frequencies, and features, however they are based on different die configurations. You should not install
5218 and 5218B processors in the same server.

Table 14. Supported second-generation Intel Xeon Scalable processors

Part number Feature code Description
4XG7A14952 B4HN Intel Xeon Gold 5215 10C 85W 2.5GHz Processor
4XG7A14966 B4P9 Intel Xeon Gold 5215L 10C 85W 2.5GHz Processor
4XG7A14951 B4HM Intel Xeon Gold 5217 8C 115W 3.0GHz Processor
4XG7A14950 B4HL Intel Xeon Gold 5218 16C 125W 2.3GHz Processor
4XG7A37048 B6BS Intel Xeon Gold 5218B 16C 125W 2.3GHz Processor
4XG7A14961 B4P3 Intel Xeon Gold 5218T 16C 105W 2.1GHz Processor
4XG7A14949 B4HK Intel Xeon Gold 5220 18C 125W 2.2GHz Processor
4XG7A16677 B6CW Intel Xeon Gold 5220S 18C 125W 2.7GHz Processor
4XG7A16671 B6CQ Intel Xeon Gold 5220T 18C 105W 1.9GHz Processor

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 27

Part number Feature code Description
4XG7A16662 B5S1 Intel Xeon Gold 5222 4C 105W 3.8GHz Processor
4XG7A16676 B6CV Intel Xeon Gold 6222V 20C 115W 1.8GHz Processor
4XG7A16667 B6CL Intel Xeon Gold 6226 12C 125W 2.8GHz Processor
4XG7A14948 B4HJ Intel Xeon Gold 6230 20C 125W 2.1GHz Processor
4XG7A16663 B5RY Intel Xeon Gold 6230N 20C 125W 2.3GHz Processor
4XG7A16670 B6CP Intel Xeon Gold 6230T 20C 125W 2.1GHz Processor
4XG7A16666 B6CK Intel Xeon Gold 6234 8C 130W 3.3GHz Processor
4XG7A16665 B6CJ Intel Xeon Gold 6238 22C 140W 2.1GHz Processor
4XG7A16672 B6CR Intel Xeon Gold 6238L 22C 140W 2.1GHz Processor
4XG7A14960 B4P2 Intel Xeon Gold 6238T 22C 125W 1.9GHz Processor
4XG7A14947 B4HH Intel Xeon Gold 6240 18C 150W 2.6GHz Processor
4XG7A16673 B6CS Intel Xeon Gold 6240L 18C 150W 2.6GHz Processor
4XG7A14954 B4NV Intel Xeon Gold 6240Y 18/14/8C 150W 2.6GHz Processor
4XG7A14946 B4HG Intel Xeon Gold 6242 16C 150W 2.8GHz Processor
4XG7A14945 B4HF Intel Xeon Gold 6244 8C 150W 3.6GHz Processor
4XG7A37361 B6PD Intel Xeon Gold 6246 12C 165W 3.3GHz Processor
4XG7A14944 B4HE Intel Xeon Gold 6248 20C 150W 2.5GHz Processor
4XG7A14942 B4HC Intel Xeon Gold 6252 24C 150W 2.1GHz Processor
4XG7A16674 B6CT Intel Xeon Gold 6252N 24C 150W 2.3GHz Processor
4XG7A14943 B4HD Intel Xeon Gold 6254 18C 200W 3.1GHz Processor
4XG7A16675 B6CU Intel Xeon Gold 6262V 24C 135W 1.9GHz Processor
4XG7A16661 B5RZ Intel Xeon Platinum 8253 16C 125W 2.2GHz Processor
4XG7A16660 B5S2 Intel Xeon Platinum 8256 4C 105W 3.8GHz Processor
4XG7A14941 B4HB Intel Xeon Platinum 8260 24C 165W 2.4GHz Processor
4XG7A14964 B4P7 Intel Xeon Platinum 8260L 24C 165W 2.4GHz Processor
4XG7A14953 B4NU Intel Xeon Platinum 8260Y 24/20/16C 165W 2.4GHz Processor
4XG7A14940 B4HA Intel Xeon Platinum 8268 24C 205W 2.9GHz Processor
4XG7A14939 B4H9 Intel Xeon Platinum 8270 26C 205W 2.7GHz Processor
4XG7A14938 B4H8 Intel Xeon Platinum 8276 28C 165W 2.2GHz Processor
4XG7A14963 B4P6 Intel Xeon Platinum 8276L 28C 165W 2.2GHz Processor
4XG7A14937 B4H7 Intel Xeon Platinum 8280 28C 205W 2.7GHz Processor
4XG7A14962 B4P5 Intel Xeon Platinum 8280L 28C 205W 2.7GHz Processor

Continued support for 1st Gen Intel Xeon Scalable processors

The SR950 also continues to support the 1st Gen Intel Xeon Scalable processors (formerly codenamed
"Skylake") listed in the following table.

Table 15. Long-life 1st Gen Intel Xeon Scalable processors

Feature
Part number code Description
4XG7A08853 AX73 ThinkSystem SR950 Intel Xeon Gold 6126T 12C 125W 2.6GHz Processor Option Kit

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 28

* Only available as a field upgrade for existing customers. Not available in CTO (configure to order)
configurations.
For specifications of these processors, see the Intel Xeon Scalable Processor Reference for Lenovo
ThinkSystem Servers:
https://lenovopress.com/lp1262-intel-xeon-sp-processor-reference#term=SKL

Memory capacity of processors

Second-generation Xeon Scalable processors are limited to the amount of memory they can address, as
follows:
Processors with an L suffix (eg 8280L): Up to 4.5 TB per processor
Processors with an M suffix (eg 8280M): Up to 2 TB per processor (now withdrawn)
All other processors: Up to 1 TB per processor
The calculation of the total memory per processor includes both the system memory DIMMs and the
Persistent Memory DCPMMs installed in the server.
For example:
A configuration using 12x 64GB DIMMs per processor is a total of 768 GB, which means that neither
an M nor L processor is required
A configuration using 12x 256GB DIMMs per processor is a total of 3 TB, which means that an L
processor is required
A configuration using 6x 32GB DIMMs + 6x 256GB DCPMMs is a total of 1.69 TB which means an M
processor is required (an L processor may also be used)
A configuration using 6x 64GB DIMMs + 6x 512GB DCPMMs is a total of 3.375 TB which means an L
processor is required
A configuration using 6x 256GB DIMMs + 6x 512GB DCPMMs is a total of 4.5 TB which means an L
processor is required

Processor features
The following table compares the features of the supported second-generation Intel Xeon processors. The
table lists the number of Intel Ultra Path Interconnect (UPI) ports each processor has. UPI ports are used to
connect processors together for high-speed communications.
When a processor has 3 UPI ports, it can be used in a 4-socket mesh configuration where all
processors are directly connected to every other processor. 5200 Series processors do not support
mesh topology, since they only have 2 UPI ports.
When a processor has only 2 UPI ports, it can only be used in a 4-socket ring configuration where all
processors are connected to the 2 adjacent processors and the fourth processor is only connected
indirectly via another processor.
The mesh and ring topologies are shown in the following figure.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 29

Figure 14. Mesh and ring processor topologies
Abbreviations used in the table:
UPI: Ultra Path Interconnect
TDP: Thermal Design Power
FMA: Number of Intel AVX-512 Fused-Multiply Add (FMA) units
HT: Hyper-Threading
TB: Turbo Boost 2.0
VT: Virtualization Technology (includes VT-x and VT-d)
SST-PP: Speed Select Technology - Performance Profile
DCPMM: DC Persistent Memory Module support
RAS: Reliability, Availability, and Serviceability: Std = Standard, Adv = Advanced
The processors that support SST-PP offer three distinct operating points that are defined by a core count
with a base speed associated with that core count. The operating point is selected during the boot process
and cannot be changed at runtime.

Table 16. Processor specifications

DCPMM
SST-PP
Max Max
CPU Cores / Core speed memory memory UPI links FMA

HT
TB
VT
model threads (Base / TB max) L3 cache* speed per CPU & speed units TDP RAS
Intel Xeon 5200 (Gold) processors
5215 10 / 20 2.5 / 3.4 GHz 13.75 MB 2666 MHz 1 TB 2, 10.4 GT/s 1 85 W Y Y Y N Y Adv
5215L 10 / 20 2.5 / 3.4 GHz 13.75 MB 2666 MHz 4.5 TB 2, 10.4 GT/s 1 85 W Y Y Y N Y Adv
5217 8 / 16 3.0 / 3.7 GHz 11 MB 2666 MHz 1 TB 2, 10.4 GT/s 1 115 W Y Y Y N Y Adv
5218** 16 / 32 2.3 / 3.9 GHz 22 MB 2666 MHz 1 TB 2, 10.4 GT/s 1 125 W Y Y Y N Y Adv
5218B** 16 / 32 2.3 / 3.9 GHz 22 MB 2666 MHz 1 TB 2, 10.4 GT/s 1 125 W Y Y Y N Y Adv
5218T 16 / 32 2.1 / 3.9 GHz 22 MB 2666 MHz 1 TB 2, 10.4 GT/s 1 105 W Y Y Y N Y Adv
5220 18 / 36 2.2 / 3.9 GHz 24.75 MB 2666 MHz 1 TB 2, 10.4 GT/s 1 125 W Y Y Y N Y Adv
5220S 18 / 36 2.7 / 3.9 GHz 24.75 MB 2666 MHz 1 TB 2, 10.4 GT/s 1 125 W Y Y Y N Y Adv
5220T 18 / 36 1.9 / 3.9 GHz 24.75 MB 2666 MHz 1 TB 2, 10.4 GT/s 1 105 W Y Y Y N Y Adv
5222 4/8 3.8 / 3.9 GHz 16.5 MB* 2933 MHz 1 TB 2, 10.4 GT/s 2 105 W Y Y Y N Y Adv
Intel Xeon 6200 (Gold) processors
6222V 20 / 40 1.8 / 3.6 GHz 27.5 MB 2400 MHz 1 TB 3, 10.4 GT/s 2 115 W Y Y Y N Y Adv
6226 12 / 24 2.7 / 3.7 GHz 19.25 MB* 2933 MHz 1 TB 3, 10.4 GT/s 2 125 W Y Y Y N Y Adv
6230 20 / 40 2.1 / 3.9 GHz 27.5 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 125 W Y Y Y N Y Adv
6230N 20 / 40 2.3 / 3.9 GHz 27.5 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 125 W Y Y Y N Y Adv
6230T 20 / 40 2.1 / 3.9 GHz 27.5 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 125 W Y Y Y N Y Adv
6234 8 / 16 3.3 / 4.0 GHz 24.75 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 130 W Y Y Y N Y Adv
6238 22 / 44 2.1 / 3.7 GHz 30.25 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 140 W Y Y Y N Y Adv

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 30

 DCPMM
SST-PP
Max Max
CPU Cores / Core speed memory memory UPI links FMA

HT
TB
VT
model threads (Base / TB max) L3 cache* speed per CPU & speed units TDP RAS
6238L 22 / 44 2.1 / 3.7 GHz 30.25 MB 2933 MHz 4.5 TB 3, 10.4 GT/s 2 140 W Y Y Y N Y Adv
6238T 22 / 44 1.9 / 3.7 GHz 30.25 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 125 W Y Y Y N Y Adv
6240 18 / 36 2.6 / 3.9 GHz 24.75 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 150 W Y Y Y N Y Adv
6240L 18 / 36 2.6 / 3.9 GHz 24.75 MB 2933 MHz 4.5 TB 3, 10.4 GT/s 2 150 W Y Y Y N Y Adv
6240Y 18 / 36 2.6 / 3.9 GHz 24.75 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 150 W Y Y Y Y Y Adv
14 / 28 2.8 / 3.9 GHz
8 / 16 3.1 / 3.9 GHz
6242 16 / 32 2.8 / 3.9 GHz 22 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 150 W Y Y Y N Y Adv
6244 8 / 16 3.6 / 4.4 GHz 24.75 MB* 2933 MHz 1 TB 3, 10.4 GT/s 2 150 W Y Y Y N Y Adv
6246 12 / 24 3.3 / 3.9 GHz 24.75 MB* 2933 MHz 1 TB 3, 10.4 GT/s 2 165 W Y Y Y N Y Adv
6248 20 / 40 2.5 / 3.9 GHz 27.5 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 150 W Y Y Y N Y Adv
6252 24 / 48 2.1 / 3.7 GHz 35.75 MB* 2933 MHz 1 TB 3, 10.4 GT/s 2 150 W Y Y Y N Y Adv
6252N 24 / 48 2.3 / 3.6 GHz 35.75 MB* 2933 MHz 1 TB 3, 10.4 GT/s 2 150 W Y Y Y N Y Adv
6254 18 / 36 3.1 / 4.0 GHz 24.75 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 200 W Y Y Y N Y Adv
6262V 24 / 48 1.9 / 3.6 GHz 33 MB 2400 MHz 1 TB 3, 10.4 GT/s 2 135 W Y Y Y N Y Adv
Intel Xeon 8200 (Platinum) processors
8253 16 / 32 2.2 / 3.0 GHz 22 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 125 W Y Y Y N Y Adv
8256 4/8 3.8 / 3.9 GHz 16.5 MB* 2933 MHz 1 TB 3, 10.4 GT/s 2 105 W Y Y Y N Y Adv
8260 24 / 48 2.4 / 3.9 GHz 35.75 MB* 2933 MHz 1 TB 3, 10.4 GT/s 2 165 W Y Y Y N Y Adv
8260L 24 / 48 2.4 / 3.9 GHz 35.75 MB* 2933 MHz 4.5 TB 3, 10.4 GT/s 2 165 W Y Y Y N Y Adv
8260Y 24 / 48 2.4 / 3.9 GHz 35.75 MB* 2933 MHz 1 TB 3, 10.4 GT/s 2 165 W Y Y Y Y Y Adv
20 / 40 2.5 / 3.9 GHz
16 / 32 2.7 / 3.9 GHz
8268 24 / 48 2.9 / 3.9 GHz 35.75 MB* 2933 MHz 1 TB 3, 10.4 GT/s 2 205 W Y Y Y N Y Adv
8270 26 / 52 2.7 / 4.0 GHz 35.75 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 205 W Y Y Y N Y Adv
8276 28 / 56 2.2 / 4.0 GHz 38.5 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 165 W Y Y Y N Y Adv
8276L 28 / 56 2.2 / 4.0 GHz 38.5 MB 2933 MHz 4.5 TB 3, 10.4 GT/s 2 165 W Y Y Y N Y Adv
8280 28 / 56 2.7 / 4.0 GHz 38.5 MB 2933 MHz 1 TB 3, 10.4 GT/s 2 205 W Y Y Y N Y Adv
8280L 28 / 56 2.7 / 4.0 GHz 38.5 MB 2933 MHz 4.5 TB 3, 10.4 GT/s 2 205 W Y Y Y N Y Adv
* L3 cache is 1.375 MB per core or larger. Processors with a larger L3 cache per core are marked with an *
** The Intel Xeon Gold 5218 and 5218B processors have similar specifications; however, they use different
silicon designs and cannot be mixed in the same system.

Adding additional processors

For configurations with only one compute tray, you can upgrade to add a second compute tray. You can also
add additional system boards as needed. The ordering information for these upgrades is listed in the
following table.

Table 17. Compute tray and system board upgrades

Part number Feature code Description
7XG7A03955 B4Y1 ThinkSystem SR950 2-CPU, 24 DIMM Compute System Board v2
4C87A37049 B6E5 ThinkSystem SR950 Upper Compute Tray Kit with 19k fans, 6-8S Upgrade v2

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 31

The Compute System Board option, 7XG7A03955, includes the following components:
One compute system board, without processors or memory

Tip: The only difference between Compute System Board v2, and the original Compute System Board is
that the v2 compute board provides sufficient power to support the new 19K RPM high-speed fans.

The Upper Compute Tray Kit, 4C87A37049, includes the following components:
1x compute tray with 12 drive bays and 1 slot for storage adapter
6x 19K RPM system fans
1x Compute System Board v2
3x 4-bay drive bay fillers
Note: The Upper Compute Tray Kit does not include drive backplanes

UEFI operating modes

The SR950 offers preset operating modes that affect energy consumption and performance. These modes
are a collection of predefined low-level UEFI settings that simplify the task of tuning the server to suit your
business and workload requirements.
The following table lists the feature codes that allow you to specify the mode you wish to preset in the
factory for CTO orders.

Table 18. UEFI operating mode presets in DCSC

Feature code Description
BFYB Operating mode selection for: "Maximum Performance Mode"
BFYC Operating mode selection for: "Minimal Power Mode"
BFYD Operating mode selection for: "Efficiency Favoring Power Savings Mode"
BFYE Operating mode selection for: "Efficiency - Favoring Performance Mode"

The preset modes for the SR950 are as follows:

Maximum Performance Mode (feature BFYB): Achieves maximum performance but with higher
power consumption and lower energy efficiency.
Minimal Power Mode (feature BFYC): Minimize the absolute power consumption of the system.
Efficiency Favoring Power Savings Mode (feature BFYD): Maximize the performance/watt
efficiency with a bias towards power savings. This is the favored mode for SPECpower benchmark
testing, for example.
Efficiency Favoring Performance Mode (feature BFYE): Maximize the performance/watt efficiency
with a bias towards performance. This is the favored mode for Energy Star certification, for example.
For details about these preset modes, and all other performance and power efficiency UEFI settings offered
in the SR950, see the paper "Tuning UEFI Settings for Performance and Energy Efficiency on Intel Xeon
Scalable Processor-Based ThinkSystem Servers", available from https://lenovopress.lenovo.com/lp1477.

Memory options
The SR950 with second-generation Intel Xeon Scalable processors uses Lenovo TruDDR4 memory
operating at up to 2933 MHz. The server supports 12 DIMMs per processor, which corresponds to 48 DIMMs
with four processors installed and 96 DIMMs when eight processors are installed. Each processor has six
memory channels with two DIMMs per channel.
With 256 GB 3DS RDIMMs installed, an 8-socket server supports a total of 24 TB of system memory.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 32

The SR950 with second-generation Intel Xeon Scalable processors also supports Intel Optane DC Persistent
Memory, as described in the Persistent Memory section.
As described in the Components and connectors section, the memory is installed on compute system
boards and there are two system boards per compute tray and one or two compute trays per server,
depending on the configuration.
The SR950 with second-generation processors supports these memory DIMMs:
2666 MHz DIMMs, that operate at 2666 MHz both at 1 DIMM per channel and 2 DIMMs per channel
2933 MHz DIMMs, that operate at 2933 MHz at 1 DIMM per channel, and at 2666 MHz at 2 DIMMs
per channel
2933 MHz Performance+ DIMMs, that operate at 2933 MHz both at 1 DIMM per channel and 2
DIMMs per channel
Note that if the processor selected has a memory bus speed of 2666 MHz, then all DIMMs will operate at
2666 MHz, even if the DIMMs are rated for 2933 MHz.
The following three tables lists the memory options that are available for SR950.
Lenovo TruDDR4 memory uses the highest quality components that are sourced from Tier 1 DRAM
suppliers and only memory that meets the strict requirements of Lenovo is selected. It is compatibility tested
and tuned to maximize performance and reliability. From a service and support standpoint, Lenovo TruDDR4
memory automatically assumes the system warranty, and Lenovo provides service and support worldwide.

Table 19. 2666 MHz memory options

Part Feature
number code Description Maximum supported
RDIMMs
7X77A01303 AUNC ThinkSystem 16GB TruDDR4 2666 MHz (2Rx8 1.2V) RDIMM 96 (12 per processor)
7X77A01304 AUND ThinkSystem 32GB TruDDR4 2666 MHz (2Rx4 1.2V) RDIMM 96 (12 per processor)

Table 20. 2933 MHz memory options

Feature Maximum
Part number code Description supported
2933 MHz RDIMMs
4ZC7A08707 B4LY ThinkSystem 16GB TruDDR4 2933 MHz (1Rx4 1.2V) RDIMM 96 (12 per processor)
4ZC7A08708 B4H2 ThinkSystem 16GB TruDDR4 2933MHz (2Rx8 1.2V) RDIMM 96 (12 per processor)
4ZC7A08709 B4H3 ThinkSystem 32GB TruDDR4 2933MHz (2Rx4 1.2V) RDIMM 96 (12 per processor)
4ZC7A08710 B4H4 ThinkSystem 64GB TruDDR4 2933MHz (2Rx4 1.2V) RDIMM 96 (12 per processor)
2933 MHz 3DS RDIMMs
4ZC7A15113 B587 ThinkSystem 128GB TruDDR4 2933MHz (4Rx4 1.2V) 3DS 96 (12 per processor)
RDIMM
4ZC7A08727 B4Y3 ThinkSystem 256GB TruDDR4 2933MHz (8Rx4 1.2V) 3DS 96 (12 per processor)
RDIMM

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 33

Table 21. 2933 MHz Performance+ memory options
Part Feature Maximum
number code Description supported
2933 MHz Performance+ RDIMMs
4X77A12184 B5N6 ThinkSystem 16GB TruDDR4 Performance+ 2933MHz (2Rx8 96 (12 per processor)
1.2V) RDIMM
4X77A12185 B5N7 ThinkSystem 32GB TruDDR4 Performance+ 2933MHz (2Rx4 96 (12 per processor)
1.2V) RDIMM
4X77A12186 B5N8 ThinkSystem 64GB TruDDR4 Performance+ 2933MHz (2Rx4 96 (12 per processor)
1.2V) RDIMM
2933 MHz Performance+ 3DS RDIMMs
4X77A12187 B5N9 ThinkSystem 128GB TruDDR4 Performance+ 2933MHz (4Rx4 96 (12 per processor)
1.2V) 3DS RDIMM
4X77A64957 B5NA ThinkSystem 256GB TruDDR4 Performance+ 2933MHz (8Rx4 96 (12 per processor)
1.2V) 3DS RDIMM

The following rules apply when selecting the memory configuration:

The server supports RDIMMs, LRDIMMs and 3DS RDIMMs. UDIMMs are not supported.
Mixing RDIMMs, LRDIMMs or 3DS RDIMMs is not supported.
Mixing x4 and x8 DIMMs is supported.
Mixing of 2933 MHz Performance+ DIMMs with other DIMMs or Persistent Memory is not supported
Mixing of 2666 MHz and 2933 MHz and is supported, however, all installed memory will operate at
the lowest speed.
For best performance, consider the following:
Ensure the memory installed is at least the same speed as the memory bus of the selected
processor.
Populate memory DIMMs in quantities of 6 or 12 per processor, so that all memory channels are
used.
When mixing 16 GB and 32 GB DIMMs in the same configuration, use 16GB 2Rx8 DIMMs instead of
16 GB 1Rx4 DIMMs for better performance.
Populate memory channels so they all have the same total memory capacity.
Ensure all memory controllers on a processor socket have the same DIMM configuration.
All processor sockets on the same physical server should have the same DIMM configuration.
The following memory protection technologies are supported:
ECC
SDDC (for x4-based memory DIMMs; look for "x4" in the DIMM description)
ADDDC (for x4-based memory DIMMs)
Memory mirroring
Memory rank sparing
If memory channel mirroring is used, then DIMMs must be installed in pairs or sets of three (minimum of one
pair or set of three per processor), and all DIMMs in the pair or set of three must be identical in type and
size. 50% of the installed capacity is available to the operating system.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 34

If memory rank sparing is used, then a minimum of two single-rank or dual-rank DIMMs must be installed per
populated channel (the DIMMs do not need to be identical). In rank sparing mode, one rank of a DIMM in
each populated channel is reserved as spare memory. The largest rank in the channel will be automatically
selected as the spare rank. The amount of memory available to the operating system depends on the
number, capacity and rank counts of the DIMMs installed.

Persistent Memory
The SR950 server supports Intel Optane DC Persistent Memory, a new class of memory and storage
technology explicitly architected for data center usage. Persistent Memory offers significantly lower latency
than fetching data from SSDs, even NVMe SSDs, and offers higher capacities than system memory.
Using Lenovo ThinkSystem servers running applications that are tuned for Intel Optane DC Persistent
Memory will result in lower data latency compared to solid-state drive technology. When data is stored
closer to the processor on nonvolatile media, applications can see significant overall improvement in
performance.
The following table lists the ordering information for the DC Persistent Memory modules (DCPMMs).

Table 22. DCPMM part numbers

Part Feature Maximum
number code Description supported
4ZC7A15110 B4LV ThinkSystem 128GB TruDDR4 2666MHz (1.2V) Intel Optane DC 48 (6 per
Persistent Memory processor)
4ZC7A15111 B4LW ThinkSystem 256GB TruDDR4 2666MHz (1.2V) Intel Optane DC 48 (6 per
Persistent Memory processor)
4ZC7A15112 B4LX ThinkSystem 512GB TruDDR4 2666MHz (1.2V) Intel Optane DC 48 (6 per
Persistent Memory processor)

The following are the requirements when installing DCPMMs:

All second generation Intel Xeon Scalable Family processors that the SR950 supports also support
DCPMMs. First generation Xeon Scalable processors are not supported.
All installed DCPMMs must be the same size. Mixing DCPMMs of different capacities is not supported
Maximum 6 DCPMMs per processor (install 1 in each memory channel)
Minimum 2 TruDDR4 DIMMs per processor (1 per memory controller)
For Memory Mode, minimum 2 DCPMMs per processor (install 1 per memory controller)
For App Direct Mode, minimum 1 DCPMM installed in the server (any processor)
When either Memory Mode or Mixed Mode is used, the ratio of memory to DCPMMs must be
between 1:16 and 1:4, but the recommended ratio is 1:4 for the best performance. For example, 6x
16GB DIMMs + 2x 256GB DCPMMs is a ratio of 1:5.33. This ratio requirement does not apply to App
Direct mode.
For each memory channel with both a DCPMM and a TruDDR4 DIMM installed, the DCPMM is
installed in channel slot 1 (closest) and the DIMM is installed in channel slot 0
To maximize performance, balance all memory channels
In configurations with DCPMMs installed, memory mirroring is supported, with two restrictions:
Mirroring is only enabled on the DRAM DIMMs installed in the server; The DCPMMs
themselves do not support mirroring.
Only App Direct mode is supported. Memory mirroring cannot be enabled when DCPMMs are
in Memory Mode or Mixed Mode.
Memory sparing is not supported with DCPMMs installed

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 35

DCPMMs offer the following memory protection technologies:
ECC
SDDC
DDDC
Patrol scrubbing
Demand scrubbing
In the App Direct mode, the DCPMMs also support memory mirroring that is performed by the processor's
integrated memory controllers. Memory mirroring is not supported in Memory Mode or Mixed Mode. Memory
rank sparing is not supported by DCPMMs in any mode.
For more information, see the Intel Optane DC Persistent Memory (DCPMM) product guide,
https://lenovopress.com/LP1066

Internal storage
The SR950 offers up to 24x 2.5-inch drive bays, depending on the server configuration selected (as
described in Server configurations). The server also supports either one or two M.2 drives, installed in an
M.2 adapter.
In this section:
Backplanes and drive bays
Adapters and cabling
M.2 drives
SED encryption key management with ISKLM

Backplanes and drive bays

Drives are all located at the front of the server, 12 drives at the front of the upper tray and 12 at the front of
the lower tray. Drives are connected to 4-drive backplanes in a 2-by-2 configuration, as shown in the
following figure. All drive bays are 2.5-inch form factor.

Figure 15. Location of backplanes

There are two different backplanes available for the SR950:
SAS/SATA backplane: Supports 4 SAS or SATA drives
AnyBay backplane:
Top two drives support SAS, SATA, or NVMe interface drives (Lenovo AnyBay)
Bottom two drive bays support SAS or SATA drives only

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 36

Regular 2.5-inch SAS/SATA drive bays support only SAS or SATA drives; however, the Lenovo AnyBay
drive bay design allows a choice of SATA, SAS, or U.2 (NVMe) PCIe drives. This design enables the
flexibility to configure some of the bays with high-performance PCIe SSDs while still using the other bays for
high-capacity HDDs, which is an ideal solution for storage-tiering.
The part numbers in the following table include the cables needed for backplane field upgrades.
The backplane kits include the cables needed for all supported HBAs and RAID adapters. If you are
upgrading a server in the field from an X30 adapter (430 HBA or RAID 530/730/930) to an X40 adapter (440
HBA or RAID 540/940), alternative cables are required and can be ordered using ThinkSystem SR950 X40
RAID Cable Kit, 4X97A80369.

Table 23. Drive backplanes and cable kit

Part Feature Maximum
number code Description supported
Backplane kits
4XB7A80584 BMQ5 ThinkSystem SR950 2.5" SAS/SATA 2x2 Bay Backplane Kit v2 6
(Support for 4 SAS/SATA drives)
7XB7A03966 AUN6 ThinkSystem 2.5" SAS/SATA 2x2 Bay Backplane Kit 6
(Support for 4 SAS/SATA drives)
4XB7A80583 BMQ4 ThinkSystem SR950 2.5" SAS/SATA/NVMe 2x2 Bay Backplane Kit v2 6
(Support for 2 AnyBay and 2 SAS/SATA drives)
7XB7A03965 AUN5 ThinkSystem 2.5" SAS/SATA/NVMe 2x2 Bay Backplane Kit 6
(Support for 2 AnyBay and 2 SAS/SATA drives)
Cable kit
4X97A80369 BN9H ThinkSystem SR950 X40 RAID Cable Kit 2
(Cables required for field upgrades when upgrading from and X30 to X40
RAID adapter or HBA; 1 kit needed for the upper drive bays and 1 for the
lower drive bays)

If the server is configured with all AnyBay backplanes, then the server supports up to 12 NVMe drives,
depending on the server configuration. The NVMe-capable drive bays are the even-numbered bays as
shown in the following figure.

Figure 16. Drive bay numbering

The quantity and location of the AnyBay drive bays depends on the configuration, as listed in the following
table.
See the Server configurations section for details about the five server configurations.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 37

Table 24. Drive bays and NVMe support for each SR950 configuration
Location of NVMe drive bays
Configuration Maximum storage (see previous figure for bay numbering)
Configuration 1. Four-Socket Performance
2 processors installed 12 drives (2 NVMe) Bays 8 and 10
3 processors installed 12 drives (4 NVMe) Bays 4, 6, 8, 10
4 processors installed 12 drives (6 NVMe) Bays 0, 2, 4, 6, 8, 10
Configuration 2. Four-Socket Performance/ Storage Rich
2 processors installed 24 drives (4 NVMe) Bays 8, 10 and 20, 22
3 processors installed 24 drives (8 NVMe) Bays 4, 6, 8, 10, and 16, 18, 20, 22
4 processors installed 24 drives (12 NVMe) Bays 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22
Configuration 3. Four-Socket Upgradable
2 processors installed 12 drives (2 NVMe) Bays 8 and 10
4 processors installed 12 drives (6 NVMe) Bays 0, 2, 4, 6, 8, 10
Configuration 4. Four-Socket Upgradable / Storage Rich
4 processors installed 24 drives (4 NVMe) Bays 8, 10 and 20, 22
Configuration 5. Eight-Socket Storage Rich
6 processors installed 24 drives (8 NVMe) Bays 0, 2, 4, 6, 8, 10 and 12, 14
8 processors installed 24 drives (12 NVMe) Bays 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22

Backplane connections are as follows:

The 4-drive SAS/SATA backplane has one SAS/SATA connector and connects to a supported RAID
controller or SAS HBA installed in the dedicated storage adapter slot.
The 4-drive AnyBay backplane has one SAS/SATA connector and connects to a supported RAID
controller or SAS HBA plus one NVMe connector to connect to NVMe ports on one of the system
boards in a compute tray or directly on the storage tray.
The SAS/SATA backplane is shown in the following figure.

Figure 17. SAS/SATA backplane

Adapters and cabling

Each compute tray or storage tray includes one dedicated PCIe slot for a RAID adapter or SAS HBA.

Tip: The adapters are described in detail in the Controllers for internal storage section.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 38

SAS/SATA backplanes are connected to the RAID adapter or HBA installed in the dedicated slot in that tray.
AnyBay backplanes (NVMe support on 2 of the 4 drive bays) are connected to the RAID adapter or HBA or
to an NVMe port adjacent to processor on a system board.
The following table lists which processor each SAS/SATA storage adapter and which NVMe port each
backplane is connected to. Backplane numbering is shown in Figure 11.
Processor numbering is shown in Figure 7.

Table 25. Processor connectivity for storage adapters and NVMe ports
4S
Slot 4S Performance/ 4S Upgradeable/ 8S Storage
Configuration location 4S Performance Storage Rich Upgradeable Storage Rich Rich
Processors installed 2 (1,2) or 3 (1,2,4) or 4 2 (1,2) or 3 (1,2,4) or 4 2 (1,2) or 4 4 (1,2,5,6) 6 (1,2,3,4,5,7)
(1,2,3,4) (1,2,3,4) (1,2,3,4) or 8 (1-8)
Storage adapter Upper NC 1 NC 5 5
slot tray
Storage adapter Lower 1 1 1 1 1
slot tray
NVMe on NC 3* NC NC 7
backplane 4
NVMe on Upper NC 4* NC NC 8*
backplane 5 tray
NVMe on NC 2 NC 6 6*
backplane 6
NVMe on 3* 3* 3* NC 3
backplane 1
NVMe on Lower 4* 4* 4* NC 4
backplane 2 tray
NVMe on 2 2 2 2 2
backplane 3
* See note below
Note: In 2, 3 and 6 processor configurations, the following backplanes cannot be AnyBay backplanes:
In 2-processor configurations, processors 3 and 4 are not installed; this means drive backplanes 1
and 2 cannot be AnyBay backplanes.
In 3-processor configurations, processor 3 is not installed; this means drive backplanes 1 and 4
cannot be AnyBay backplanes
In 6-processor configurations, processors 6 & 8 are not installed; this means drive backplanes 5 and
6 cannot be AnyBay backplanes

M.2 drives
The server supports one or two M.2 form-factor SATA drives for use as an operating system boot solution.
With two M.2 drives configured, the drives are configured by default as a RAID-1 mirrored pair for
redundancy.
The M.2 drives install into an M.2 adapter which in turn is installed in a dedicated slot on the system board.
See the internal view of the server in the Components and connectors section for the location of the M.2 slot.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 39

There are two M.2 adapters supported, as listed in the following table.

Table 26. M.2 components

Part Feature Maximum
number code Description supported
7Y37A01092 AUMU ThinkSystem M.2 Enablement Kit 1
(contains the Single M.2 Boot Adapter; supports 1 drive)
7Y37A01093 AUMV ThinkSystem M.2 with Mirroring Enablement Kit 1
(contains the Dual M.2 Boot Adapter, supports 1 or 2 drives)

Supported drives are listed in the Internal drive options section.

For details about M.2 components, see the ThinkSystem M.2 Drives and M.2 Adapters product guide:
https://lenovopress.com/lp0769-thinksystem-m2-drives-adapters

SED encryption key management with SKLM

The server supports self-encrypting drives (SEDs) as listed in the Internal drive options section. To
effectively manage a large deployment of these drives in Lenovo servers, IBM Security Key Lifecycle
Manager (SKLM) offers a centralized key management solution. A Lenovo Feature on Demand (FoD)
upgrade is used to enable this SKLM support in the management processor of the server.
The following table lists the part numbers and feature codes for the upgrades.

Table 27. FoD upgrades for SKLM support

Part number Feature code Description
Security Key Lifecycle Manager - FoD (United States, Canada, Asia Pacific, and Japan)
00D9998 A5U1 SKLM for System x/ThinkSystem w/SEDs - FoD per Install with 1 year S&S
00D9999 AS6C SKLM for System x/ThinkSystem w/SEDs - FoD per Install with 3 year S&S
Security Key Lifecycle Manager - FoD (Latin America, Europe, Middle East, and Africa)
00FP648 A5U1 SKLM for System x/ThinkSystem w/SEDs - FoD per Install with 1 year S&S
00FP649 AS6C SKLM for System x/ThinkSystem w/SEDs - FoD per Install with 3 year S&S

The IBM Security Key Lifecycle Manager software is available from Lenovo using the ordering information
listed in the following table.

Table 28. IBM Security Key Lifecycle Manager licenses

Part number Description
7S0A007FWW IBM Security Key Lifecycle Manager Basic Edition Install License + SW Subscription & Support 12
Months
7S0A007HWW IBM Security Key Lifecycle Manager For Raw Decimal Terabyte Storage Resource Value Unit
License + SW Subscription & Support 12 Months
7S0A007KWW IBM Security Key Lifecycle Manager For Raw Decimal Petabyte Storage Resource Value Unit
License + SW Subscription & Support 12 Months
7S0A007MWW IBM Security Key Lifecycle Manager For Usable Decimal Terabyte Storage Resource Value Unit
License + SW Subscription & Support 12 Months
7S0A007PWW IBM Security Key Lifecycle Manager For Usable Decimal Petabyte Storage Resource Value Unit
License + SW Subscription & Support 12 Months

Controllers for internal storage

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 40
Controllers for internal storage
The SR950 supports internal SAS and SATA drives with the addition of a RAID adapter or HBA. The adapter
is installed in a dedicated slot in each compute tray. For NVMe support, the server uses NVMe ports that are
on the compute system boards or on the storage tray if one is configured.
The following table lists the supported adapters.

No Tri-Mode support: The server does not support RAID adapters with Tri-Mode (supporting SAS,
SATA and NVMe drives).

Table 29. Controllers for internal storage

Feature Number Maximum
Part number code Description of ports supported
SAS/SATA HBA
7Y37A01088 AUNL ThinkSystem 430-8i SAS/SATA 12Gb HBA 8 2
7Y37A01089 AUNM ThinkSystem 430-16i SAS/SATA 12Gb HBA 12** 2
4Y37A78601 BM51 ThinkSystem 440-8i SAS/SATA PCIe Gen4 12Gb HBA 8 2
4Y37A78602 BM50 ThinkSystem 440-16i SAS/SATA PCIe Gen4 12Gb HBA 16 2
RAID adapters
7Y37A01082 AUNG ThinkSystem RAID 530-8i PCIe 12Gb Adapter 8 2
4Y37A78834 BMFT ThinkSystem RAID 540-8i PCIe Gen4 12Gb Adapter 8 2
7Y37A01083* AUNH* ThinkSystem RAID 730-8i 1GB Cache PCIe 12Gb Adapter 8 2
4Y37A09722 B4RQ ThinkSystem RAID 730-8i 2GB Flash PCIe 12Gb Adapter 8 2
7Y37A01084 AUNJ ThinkSystem RAID 930-8i 2GB Flash PCIe 12Gb Adapter 8 2
7Y37A01085 AUNK ThinkSystem RAID 930-16i 4GB Flash PCIe 12Gb Adapter 12** 2
4Y37A09721 B31E ThinkSystem RAID 930-16i 8GB Flash PCIe 12Gb Adapter 12** 2
4Y37A09728 B8NY ThinkSystem RAID 940-8i 4GB Flash PCIe Gen4 12Gb 8 2
Adapter
4Y37A78600 BM35 ThinkSystem RAID 940-16i 4GB Flash PCIe Gen4 12Gb 12** 2
Adapter
4Y37A09730 B8NZ ThinkSystem RAID 940-16i 8GB Flash PCIe Gen4 12Gb 12** 2
Adapter
* The RAID 730-8i 1GB Cache adapter is not available in USA and Canada.
** The 430-16i HBA and RAID 930-16i adapter support 12 drives when used in the SR950
For a comparison of the functions of the supported storage adapters, see the ThinkSystem RAID Adapter
and HBA Reference:
https://lenovopress.com/lp1288-thinksystem-raid-adapter-and-hba-reference#sr950-support=SR950

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 41

Internal drive options
The following tables list the drive options for internal storage of the server.
2.5-inch hot-swap drives:
2.5-inch hot-swap 12 Gb SAS HDDs
2.5-inch hot-swap 6 Gb SATA HDDs
2.5-inch hot-swap 24 Gb SAS SSDs
2.5-inch hot-swap 12 Gb SAS SSDs
2.5-inch hot-swap 6 Gb SATA SSDs
2.5-inch hot-swap PCIe 4.0 NVMe SSDs
2.5-inch hot-swap PCIe 3.0 NVMe SSDs
M.2 drives:
M.2 SATA drives

M.2 drive support: The use of M.2 drives requires an additional adapter as described in the M.2 drives
subsection.

SED support: The tables include a column to indicate which drives support SED encryption. The
encryption functionality can be disabled if needed. Note: Not all SED-enabled drives have "SED" in the
description.

PCIe 4.0 NVMe drive support: When installed in this server, PCIe 4.0 NVMe drives will operate at PCIe
3.0 speeds.

Table 30. 2.5-inch hot-swap 12 Gb SAS HDDs

Feature SED Max
Part number code Description support Qty
2.5-inch hot-swap HDDs - 12 Gb SAS 15K
7XB7A00021 AULV ThinkSystem 2.5" 300GB 15K SAS 12Gb Hot Swap 512n HDD No 24
7XB7A00022 AULW ThinkSystem 2.5" 600GB 15K SAS 12Gb Hot Swap 512n HDD No 24
7XB7A00023 AULX ThinkSystem 2.5" 900GB 15K SAS 12Gb Hot Swap 512e HDD No 24
2.5-inch hot-swap HDDs - 12 Gb SAS 10K
7XB7A00024 AULY ThinkSystem 2.5" 300GB 10K SAS 12Gb Hot Swap 512n HDD No 24
7XB7A00025 AULZ ThinkSystem 2.5" 600GB 10K SAS 12Gb Hot Swap 512n HDD No 24
7XB7A00026 AUM0 ThinkSystem 2.5" 900GB 10K SAS 12Gb Hot Swap 512n HDD No 24
7XB7A00027 AUM1 ThinkSystem 2.5" 1.2TB 10K SAS 12Gb Hot Swap 512n HDD No 24
7XB7A00028 AUM2 ThinkSystem 2.5" 1.8TB 10K SAS 12Gb Hot Swap 512e HDD No 24
7XB7A00069 B0YS ThinkSystem 2.5" 2.4TB 10K SAS 12Gb Hot Swap 512e HDD No 24
2.5-inch hot-swap HDDs - 12 Gb NL SAS
7XB7A00034 AUM6 ThinkSystem 2.5" 1TB 7.2K SAS 12Gb Hot Swap 512n HDD No 24
7XB7A00035 AUM7 ThinkSystem 2.5" 2TB 7.2K SAS 12Gb Hot Swap 512n HDD No 24
2.5-inch hot-swap SED HDDs - 12 Gb SAS 10K
7XB7A00031 AUM5 ThinkSystem 2.5" 600GB 10K SAS 12Gb Hot Swap 512n HDD SED Support 24
7XB7A00033 B0YX ThinkSystem 2.5" 1.2TB 10K SAS 12Gb Hot Swap 512n HDD SED Support 24

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 42

Table 31. 2.5-inch hot-swap 6 Gb SATA HDDs
Feature SED Max
Part number code Description support Qty
2.5-inch hot-swap HDDs - 6 Gb NL SATA
7XB7A00036 AUUE ThinkSystem 2.5" 1TB 7.2K SATA 6Gb Hot Swap 512n HDD No 24
7XB7A00037 AUUJ ThinkSystem 2.5" 2TB 7.2K SATA 6Gb Hot Swap 512e HDD No 24

Table 32. 2.5-inch hot-swap 24 Gb SAS SSDs

Feature SED Max
Part number code Description support Qty
2.5-inch hot-swap SSDs - 24 Gb SAS - Mixed Use/Mainstream (3-5 DWPD)
4XB7A80340 BNW8 ThinkSystem 2.5" PM1655 800GB Mixed Use SAS 24Gb HS SSD Support 24
4XB7A80341 BNW9 ThinkSystem 2.5" PM1655 1.6TB Mixed Use SAS 24Gb HS SSD Support 24
4XB7A80342 BNW6 ThinkSystem 2.5" PM1655 3.2TB Mixed Use SAS 24Gb HS SSD Support 24
4XB7A80343 BP3K ThinkSystem 2.5" PM1655 6.4TB Mixed Use SAS 24Gb HS SSD Support 24
2.5-inch hot-swap SSDs - 24 Gb SAS - Read Intensive/Entry/Capacity (<3 DWPD)
4XB7A80318 BNWC ThinkSystem 2.5" PM1653 960GB Read Intensive SAS 24Gb HS SSD Support 24
4XB7A80319 BNWE ThinkSystem 2.5" PM1653 1.92TB Read Intensive SAS 24Gb HS SSD Support 24
4XB7A80320 BNWF ThinkSystem 2.5" PM1653 3.84TB Read Intensive SAS 24Gb HS SSD Support 24
4XB7A80321 BP3E ThinkSystem 2.5" PM1653 7.68TB Read Intensive SAS 24Gb HS SSD Support 24
4XB7A80322 BP3J ThinkSystem 2.5" PM1653 15.36TB Read Intensive SAS 24Gb HS SSD Support 24
4XB7A80323 BP3D ThinkSystem 2.5" PM1653 30.72TB Read Intensive SAS 24Gb HS SSD Support 24

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 43

Table 33. 2.5-inch hot-swap 12 Gb SAS SSDs
Feature SED Max
Part number code Description support Qty
2.5-inch hot-swap SSDs - 12 Gb SAS - Write Intensive/Performance (10+ DWPD)
4XB7A83214 BR10 ThinkSystem 2.5" Nytro 3750 400GB Write Intensive SAS 12Gb HS Support 24
SSD
4XB7A83215 BR0Z ThinkSystem 2.5" Nytro 3750 800GB Write Intensive SAS 12Gb HS Support 24
SSD
4XB7A83216 BR0Y ThinkSystem 2.5" Nytro 3750 1.6TB Write Intensive SAS 12Gb HS SSD Support 24
4XB7A83217 BR0X ThinkSystem 2.5" Nytro 3750 3.2TB Write Intensive SAS 12Gb HS SSD Support 24
4XB7A70006 BG07 ThinkSystem 2.5" Nytro 3732 400GB Performance SAS 12Gb Hot Swap No 24
SSD
4XB7A70005 BG06 ThinkSystem 2.5" Nytro 3732 800GB Performance SAS 12Gb Hot Swap No 24
SSD
4XB7A70007 BFZZ ThinkSystem 2.5" Nytro 3732 800GB Performance SAS 12Gb Hot Swap Support 24
SSD SED
4XB7A70004 BG05 ThinkSystem 2.5" Nytro 3732 1.6TB Performance SAS 12Gb Hot Swap No 24
SSD
4XB7A70003 BG04 ThinkSystem 2.5" Nytro 3732 3.2TB Performance SAS 12Gb Hot Swap No 24
SSD
2.5-inch hot-swap SSDs - 12 Gb SAS - Mixed Use/Mainstream (3-5 DWPD)
4XB7A17062 B8HU ThinkSystem 2.5" PM1645a 800GB Mainstream SAS 12Gb Hot Swap No 24
SSD
4XB7A17063 B8J4 ThinkSystem 2.5" PM1645a 1.6TB Mainstream SAS 12Gb Hot Swap No 24
SSD
4XB7A17064 B8JD ThinkSystem 2.5" PM1645a 3.2TB Mainstream SAS 12Gb Hot Swap No 24
SSD
4XB7A17065 B8JA ThinkSystem 2.5" PM1645a 6.4TB Mainstream SAS 12Gb Hot Swap No 24
SSD
2.5-inch hot-swap SSDs - 12 Gb SAS - Read Intensive/Entry/Capacity (<3 DWPD)
4XB7A38175 B91A ThinkSystem 2.5" PM1643a 960GB Entry SAS 12Gb Hot Swap SSD No 24
4XB7A38176 B91B ThinkSystem 2.5" PM1643a 1.92TB Entry SAS 12Gb Hot Swap SSD No 24
4XB7A17054 B91C ThinkSystem 2.5" PM1643a 3.84TB Entry SAS 12Gb Hot Swap SSD No 24
4XB7A17055 B91D ThinkSystem 2.5" PM1643a 7.68TB Entry SAS 12Gb Hot Swap SSD No 24
4XB7A17056 BC4R ThinkSystem 2.5" PM1643a 15.36TB Entry SAS 12Gb Hot Swap SSD No 24

Table 34. 2.5-inch hot-swap 6 Gb SATA SSDs

Feature SED Max
Part number code Description support Qty
2.5-inch hot-swap SSDs - 6 Gb SATA - Mixed Use/Mainstream (3-5 DWPD)
4XB7A82289 BQ21 ThinkSystem 2.5" 5400 MAX 480GB Mixed Use SATA 6Gb HS SSD Support 24
4XB7A82290 BQ24 ThinkSystem 2.5" 5400 MAX 960GB Mixed Use SATA 6Gb HS SSD Support 24
4XB7A82291 BQ22 ThinkSystem 2.5" 5400 MAX 1.92TB Mixed Use SATA 6Gb HS SSD Support 24
4XB7A82292 BQ23 ThinkSystem 2.5" 5400 MAX 3.84TB Mixed Use SATA 6Gb HS SSD Support 24
4XB7A17125 BA7Q ThinkSystem 2.5" S4620 480GB Mixed Use SATA 6Gb HS SSD No 24

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 44

 Feature SED Max
Part number code Description support Qty
4XB7A17126 BA4T ThinkSystem 2.5" S4620 960GB Mixed Use SATA 6Gb HS SSD No 24
4XB7A17127 BA4U ThinkSystem 2.5" S4620 1.92TB Mixed Use SATA 6Gb HS SSD No 24
4XB7A17128 BK7L ThinkSystem 2.5" S4620 3.84TB Mixed Use SATA 6Gb HS SSD No 24
4XB7A17087 B8J1 ThinkSystem 2.5" 5300 240GB Mainstream SATA 6Gb Hot Swap SSD No 24
4XB7A17088 B8HY ThinkSystem 2.5" 5300 480GB Mainstream SATA 6Gb Hot Swap SSD No 24
4XB7A17089 B8J6 ThinkSystem 2.5" 5300 960GB Mainstream SATA 6Gb Hot Swap SSD No 24
4XB7A17090 B8JE ThinkSystem 2.5" 5300 1.92TB Mainstream SATA 6Gb Hot Swap SSD No 24
4XB7A17091 B8J7 ThinkSystem 2.5" 5300 3.84TB Mainstream SATA 6Gb Hot Swap SSD No 24
4XB7A13633 B49L ThinkSystem 2.5" S4610 240GB Mixed Use SATA 6Gb HS SSD No 24
4XB7A13637 B49Q ThinkSystem 2.5" S4610 3.84TB Mixed Use SATA 6Gb HS SSD No 24
2.5-inch hot-swap SSDs - 6 Gb SATA - Read Intensive/Entry (<3 DWPD)
4XB7A82258 BQ1Q ThinkSystem 2.5" 5400 PRO 240GB Read Intensive SATA 6Gb HS Support 24
SSD
4XB7A82259 BQ1P ThinkSystem 2.5" 5400 PRO 480GB Read Intensive SATA 6Gb HS Support 24
SSD
4XB7A82260 BQ1R ThinkSystem 2.5" 5400 PRO 960GB Read Intensive SATA 6Gb HS Support 24
SSD
4XB7A82261 BQ1X ThinkSystem 2.5" 5400 PRO 1.92TB Read Intensive SATA 6Gb HS Support 24
SSD
4XB7A82262 BQ1S ThinkSystem 2.5" 5400 PRO 3.84TB Read Intensive SATA 6Gb HS Support 24
SSD
4XB7A82263 BQ1T ThinkSystem 2.5" 5400 PRO 7.68TB Read Intensive SATA 6Gb HS Support 24
SSD
4XB7A72438 BM8B ThinkSystem 2.5" PM893 480GB Read Intensive SATA 6Gb HS SSD No 24
4XB7A72439 BM8A ThinkSystem 2.5" PM893 960GB Read Intensive SATA 6Gb HS SSD No 24
4XB7A72440 BM89 ThinkSystem 2.5" PM893 1.92TB Read Intensive SATA 6Gb HS SSD No 24
4XB7A72441 BM88 ThinkSystem 2.5" PM893 3.84TB Read Intensive SATA 6Gb HS SSD No 24
4XB7A72442 BM87 ThinkSystem 2.5" PM893 7.68TB Read Intensive SATA 6Gb HS SSD No 24
4XB7A17072 B99D ThinkSystem 2.5" S4520 240GB Read Intensive SATA 6Gb HS SSD No 24
4XB7A17101 BA7G ThinkSystem 2.5" S4520 480GB Read Intensive SATA 6Gb HS SSD No 24
4XB7A17102 BA7H ThinkSystem 2.5" S4520 960GB Read Intensive SATA 6Gb HS SSD No 24
4XB7A17103 BA7J ThinkSystem 2.5" S4520 1.92TB Read Intensive SATA 6Gb HS SSD No 24
4XB7A17104 BK77 ThinkSystem 2.5" S4520 3.84TB Read Intensive SATA 6Gb HS SSD No 24
4XB7A17105 BK78 ThinkSystem 2.5" S4520 7.68TB Read Intensive SATA 6Gb HS SSD No 24
4XB7A38271 BCTC ThinkSystem 2.5" Multi Vendor 240GB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A38272 BCTD ThinkSystem 2.5" Multi Vendor 480GB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A38273 BCTE ThinkSystem 2.5" Multi Vendor 960GB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A38274 BCTF ThinkSystem 2.5" Multi Vendor 1.92TB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A38275 BCTG ThinkSystem 2.5" Multi Vendor 3.84TB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A17075 B8HV ThinkSystem 2.5" 5300 240GB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A17076 B8JM ThinkSystem 2.5" 5300 480GB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A17077 B8HP ThinkSystem 2.5" 5300 960GB Entry SATA 6Gb Hot Swap SSD No 24

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 45

 Feature SED Max
Part number code Description support Qty
4XB7A17078 B8J5 ThinkSystem 2.5" 5300 1.92TB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A17079 B8JP ThinkSystem 2.5" 5300 3.84TB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A17080 B8J2 ThinkSystem 2.5" 5300 7.68TB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A38185 B9AC ThinkSystem 2.5" 5210 960GB Entry SATA 6Gb Hot Swap QLC SSD No 24
4XB7A38144 B7EW ThinkSystem 2.5" 5210 1.92TB Entry SATA 6Gb Hot Swap QLC SSD No 24
4XB7A38145 B7EX ThinkSystem 2.5" 5210 3.84TB Entry SATA 6Gb Hot Swap QLC SSD No 24
4XB7A38146 B7EY ThinkSystem 2.5" 5210 7.68TB Entry SATA 6Gb Hot Swap QLC SSD No 24
4XB7A10197 B34K ThinkSystem 2.5" PM883 960GB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A10198 B34L ThinkSystem 2.5" PM883 1.92TB Entry SATA 6Gb Hot Swap SSD No 24
4XB7A10200 B4D2 ThinkSystem 2.5" PM883 7.68TB Entry SATA 6Gb Hot Swap SSD No 24

Table 35. 2.5-inch hot-swap PCIe 4.0 NVMe SSDs

Feature SED Max
Part number code Description support Qty
2.5-inch SSDs - U.2 PCIe 4.0 NVMe - Mixed Use/Mainstream (3-5 DWPD)
4XB7A17129 BNEG ThinkSystem 2.5" U.2 P5620 1.6TB Mixed Use NVMe PCIe 4.0 x4 HS Support 12
SSD
4XB7A17130 BNEH ThinkSystem 2.5" U.2 P5620 3.2TB Mixed Use NVMe PCIe 4.0 x4 HS Support 12
SSD
4XB7A17133 BNEZ ThinkSystem 2.5" U.2 P5620 6.4TB Mixed Use NVMe PCIe 4.0 x4 HS Support 12
SSD
4XB7A17152 BCFV ThinkSystem 2.5" U.2 P5600 1.6TB Mixed Use NVMe PCIe 4.0 x4 HS No 12
SSD
2.5-inch SSDs - U.3 PCIe 4.0 NVMe - Mixed Use/Mainstream (3-5 DWPD)
4XB7A79639 BNF1 ThinkSystem 2.5" U.3 7450 MAX 800GB Mixed Use NVMe PCIe 4.0 x4 Support 12
HS SSD
4XB7A13967 BNEJ ThinkSystem 2.5" U.3 7450 MAX 1.6TB Mixed Use NVMe PCIe 4.0 x4 Support 12
HS SSD
4XB7A13970 BNEY ThinkSystem 2.5" U.3 7450 MAX 3.2TB Mixed Use NVMe PCIe 4.0 x4 Support 12
HS SSD
4XB7A13971 BNEL ThinkSystem 2.5" U.3 7450 MAX 6.4TB Mixed Use NVMe PCIe 4.0 x4 Support 12
HS SSD
4XB7A64175 BE03 ThinkSystem U.3 Kioxia CM6-V 800GB Mainstream NVMe PCIe 4.0 x4 No 12
Hot Swap SSD
4XB7A17112 B96Z ThinkSystem U.3 Kioxia CM6-V 1.6TB Mainstream NVMe PCIe4.0 x4 No 12
Hot Swap SSD
4XB7A17113 B96T ThinkSystem U.3 Kioxia CM6-V 3.2TB Mainstream NVMe PCIe4.0 x4 No 12
Hot Swap SSD
4XB7A17114 B96P ThinkSystem U.3 Kioxia CM6-V 6.4TB Mainstream NVMe PCIe4.0 x4 No 12
Hot Swap SSD
2.5-inch SSDs - U.2 PCIe 4.0 NVMe - Read Intensive/Entry (<3 DWPD)
4XB7A13941 BMGD ThinkSystem 2.5" U.2 P5520 1.92TB Read Intensive NVMe PCIe 4.0 x4 Support 12
HS SSD

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 46

 Feature SED Max
Part number code Description support Qty
4XB7A13942 BMGE ThinkSystem 2.5" U.2 P5520 3.84TB Read Intensive NVMe PCIe 4.0 x4 Support 12
HS SSD
4XB7A13943 BNEF ThinkSystem 2.5" U.2 P5520 7.68TB Read Intensive NVMe PCIe 4.0 x4 Support 12
HS SSD
4XB7A13631 BNEQ ThinkSystem 2.5" U.2 P5520 15.36TB Read Intensive NVMe PCIe 4.0 Support 12
x4 HS SSD
4XB7A17145 BCFT ThinkSystem 2.5" U.2 P5500 1.92TB Read Intensive NVMe PCIe 4.0 x4 No 12
HS SSD
2.5-inch SSDs - U.3 PCIe 4.0 NVMe - Read Intensive/Entry (<3 DWPD)
4XB7A79646 BNF3 ThinkSystem 2.5" U.3 7450 PRO 960GB Read Intensive NVMe PCIe Support 12
4.0 x4 HS SSD
4XB7A79647 BNF2 ThinkSystem 2.5" U.3 7450 PRO 1.92TB Read Intensive NVMe PCIe Support 12
4.0 x4 HS SSD
4XB7A79648 BNF5 ThinkSystem 2.5" U.3 7450 PRO 3.84TB Read Intensive NVMe PCIe Support 12
4.0 x4 HS SSD
4XB7A79649 BNF4 ThinkSystem 2.5" U.3 7450 PRO 7.68TB Read Intensive NVMe PCIe Support 12
4.0 x4 HS SSD
4XB7A83097 BQAV ThinkSystem 2.5" U.3 7450 PRO 15.36TB Read Intensive NVMe PCIe Support 12
4.0 x4 HS SSD

Note: NVMe PCIe SSDs support surprise hot removal and hot insertion, provided the operating system
supports PCIe SSD hot-swap.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 47

Table 36. 2.5-inch hot-swap PCIe 3.0 NVMe SSDs
Feature SED Max
Part number code Description support Qty
2.5-inch SSDs - U.2 PCIe 3.0 NVMe - Write Intensive/Performance (10+ DWPD)
7N47A00081 AUMJ ThinkSystem 2.5" U.2 P4800X 375GB Write Intensive NVMe PCIe 3.0 No 12
x4 HS SSD
2.5-inch SSDs - U.2 PCIe 3.0 NVMe - Mixed Use/Mainstream (3-5 DWPD)
4XB7A13936 B589 ThinkSystem U.2 Intel P4610 1.6TB Mainstream NVMe PCIe3.0 x4 Hot No 12
Swap SSD
4XB7A13938 B58B ThinkSystem U.2 Intel P4610 6.4TB Mainstream NVMe PCIe3.0 x4 Hot No 12
Swap SSD
2.5-inch SSDs - U.2 PCIe 3.0 NVMe - Read Intensive/Entry (<3 DWPD)
4XB7A10202 B58F ThinkSystem U.2 Intel P4510 1.0TB Entry NVMe PCIe3.0 x4 Hot Swap No 12
SSD
4XB7A10205 B58H ThinkSystem U.2 Intel P4510 4.0TB Entry NVMe PCIe3.0 x4 Hot Swap No 12
SSD
4XB7A08513 B58J ThinkSystem U.2 Intel P4510 8.0TB Entry NVMe PCIe3.0 x4 Hot Swap No 12
SSD
4XB7A10175 B34N ThinkSystem U.2 PM983 1.92TB Entry NVMe PCIe 3.0 x4 Hot Swap No 12
SSD
4XB7A10176 B34P ThinkSystem U.2 PM983 3.84TB Entry NVMe PCIe 3.0 x4 Hot Swap No 12
SSD
4XB7A10177 B4D3 ThinkSystem U.2 PM983 7.68TB Entry NVMe PCIe3.0 x4 Hot Swap No 12
SSD

Note: NVMe PCIe SSDs support surprise hot removal and hot insertion, provided the operating system
supports PCIe SSD hot-swap.

Table 37. M.2 SATA drives

Feature SED Max
Part number code Description support Qty
M.2 SSDs - 6 Gb SATA - Read Intensive/Entry (<3 DWPD)
4XB7A82286 BQ1Z ThinkSystem M.2 5400 PRO 240GB Read Intensive SATA 6Gb NHS Support 2
SSD
4XB7A82287 BQ1Y ThinkSystem M.2 5400 PRO 480GB Read Intensive SATA 6Gb NHS Support 2
SSD
7N47A00129 AUUL ThinkSystem M.2 32GB SATA 6Gbps Non-Hot Swap SSD No 2
7N47A00130 AUUV ThinkSystem M.2 128GB SATA 6Gbps Non-Hot Swap SSD No 2
4XB7A17071 B8HS ThinkSystem M.2 5300 240GB SATA 6Gbps Non-Hot Swap SSD No 2
4XB7A17073 B919 ThinkSystem M.2 5300 480GB SATA 6Gbps Non-Hot Swap SSD No 2

Internal backup units

The server does not support any internal backup units.

Optical drives
Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 48
Optical drives
The server supports the external USB optical drive listed in the following table.

Table 38. External optical drive

Part number Feature code Description
7XA7A05926 AVV8 ThinkSystem External USB DVD RW Optical Disk Drive

The drive is based on the Lenovo Slim DVD Burner DB65 drive and supports the following formats: DVD-
RAM, DVD-RW, DVD+RW, DVD+R, DVD-R, DVD-ROM, DVD-R DL, CD-RW, CD-R, CD-ROM.

I/O expansion options

The server supports the following PCIe slots, depending on the server configuration selected:
Slots 1-17 are PCIe 3.0 slots accessible from the rear of the server
One internal dedicated M.2 slot for an M.2 adapter located internally on the I/O tray
Two internal dedicated PCIe 3.0 x8 slots for storage adapters, located internally in each compute tray
or storage tray
The following figure shows the locations of the slots at the rear of the server.

Figure 18. PCIe 3.0 slots at the rear of the server

Processor connectivity: The processor that each slot is connected to depends on the server
configuration. See the table in the Slot availability by server configuration section for details.

The 17 PCIe 3.0 rear-accessible slots are as follows:

Slots 1-4 are via Riser Slot 1, one riser card of:
Riser with 4x PCIe 3.0 x16 slots, all full-height half-length, all 75W
Riser with 2x PCIe 3.0 x16 slots, all full-height half-length, both 75W
Riser with 4x PCIe 3.0 x8 slots, full-height half-length, all 75W
Slot 5: PCIe 3.0 x16, low profile, 75W

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 49

 Slot 6: PCIe 3.0 x16, low profile, 75W
Slot 7: PCIe 3.0 x8, low profile, 75W
Slot 8: PCIe 3.0 x16 ML2, low profile (supports NC-SI)
Slot 9: PCIe 3.0 x8 LOM adapter slot, low profile (supports NC-SI)
Slots 10-15 are via Riser Slot 2, one riser card of:
Riser 5x16+ML2
Five PCIe 3.0 x16 slots, all full-height half-length, all 75W
One PCIe 3.0 x16 ML2 slot, full-height half-length, 30W (no NC-SI support)
Riser 2x16: Two PCIe 3.0 x16 slots, all full-height half-length, both 75W
Riser 4x8: Four PCIe 3.0 x8 slots, full-height half-length, all 75W
Slot 16-17 on a riser:
PCIe 3.0 x8 low profile, 75W
PCIe 3.0 x8 low profile, 75W
Additional internal PCIe slots:
One or two PCIe 3.0 x8 slots for storage adapters, one in each compute tray
M.2 adapter slot
NC-SI (Network Controller Sideband Interface or NCSI) support means the primary port on the adapter
installed in that slot can be configured as shared between XCC out-of-band management traffic and
production Ethernet traffic.
For riser slots 1 and 2, the server supports the following three riser cards. These are shown in the figure
below.
Riser 5x16+ML2:
Five PCIe 3.0 x16 slots, all full-height half-length, all 75W
One PCIe 3.0 x16 ML2 slot, full-height half-length, 30W (no NC-SI support)
Note: When the 5x16+ML2 riser is installed in riser slot 1, the bottom two slots (including the ML2)
are not accessible and cannot be used.
Riser 2x16: Two PCIe 3.0 x16 slots, all full-height half-length, both 75W
Riser 4x8: Four PCIe 3.0 x8 slots, full-height half-length, all 75W

Note: The ML2 slot on the riser card does not support NC-SI.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 50

Figure 19. Riser cards for riser slots 1 and 2
Slot numbering is as follows:
When installed in riser slot 1:
Riser 5x16+ML2 becomes slots 1-4 (bottom two slots inaccessible)
Riser 2x16 becomes slots 3-4
Riser 4x8 becomes slots 1-4
When installed in riser slot 2:
Riser 5x16+ML2 becomes slots 10-15
Riser 2x16 becomes slots 12-13
Riser 4x8 becomes slots 10-13

Note: When the 5x16+ML2 riser card is used in Riser slot 1, only the top 4 slots (all x16) are accessible.
The lower x16 and x16 ML2 slots cannot physically be accessed or used.

Slots 16 and 17 are mounted on a single 2x8 riser card and are as follows:
Slot 16: PCIe 3.0 x8, full-height half-length, 75W
Slot 17: PCIe 3.0 x8, full-height half-length, 75W
The 2x8 riser card is shown below.

Figure 20. 2x8 riser card

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 51

Ordering information for the riser cards is listed in the following table.

Table 39. Riser card ordering information

Part Feature
number code Description
Riser cards for riser slots 1 and 2
7XC7A03963 AUN3 ThinkSystem SR950 up to (5) x16 + x16 ML2 PCIe Riser
7XC7A03961 AUN1 ThinkSystem SR950 (2) x16 PCIe Riser
7XC7A03962 AUN2 ThinkSystem SR950 (4) x8 PCIe Riser
Riser card for 2x8 riser slot
7XC7A03964 AUN4 ThinkSystem SR950 (2) x8 PCIe Riser

Slot availability by server configuration

The riser cards required for each server configuration are listed in the following table. See the Server
configurations section for details.

Table 40. Riser card requirements

4S Performance/ 4S Upgradeable/
Riser 4S Performance Storage Rich 4S Upgradeable Storage Rich 8S Storage Rich
Riser 1 4x8 or 2x16 4x8 or 2x16 4x8 or 2x16 5x16+ML2* 5x16+ML2*
Riser 2 4x8 or 2x16 4x8 or 2x16 4x8 or 2x16 5x16+ML2* 5x16+ML2*
2x8 Riser 2x8 None 2x8 2x8 2x8
* If desired, the 4x8 or 2x16 riser cards can be used instead of the 5x16+ML2 riser, with reduced slot
availability
Based on these riser card requirements, the available slots for each server configuration are highlighted with
a grey background in the following table. The table also lists the processor that each PCIe slot is connected
to, based on the server configuration selected. In the table, NC means not connected.
Processor numbering is shown in Figure 7.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 52

Table 41. Processor connectivity for PCIe slots (NC = not connected)
4S
Upgradable/
Slot 4S Performance/ 4S Storage 8S Storage
Configuration location 4S Performance Storage Rich Upgradable Rich Rich
Processors installed 2 (1,2) or 3 (1,2,4) or 2 (1,2) or 3 (1,2,4) or 2 (1,2) or 4 4 (1,2,5,6) 6
4 (1,2,3,4) 4 (1,2,3,4) (1,2,3,4) (1,2,3,4,5,7)
or 8 (1-8)
Slot 1 4** 4** 4** NC 8**
(NC for 2x16)* (NC for 2x16)* (NC for
2x16)*
Slot 2 4** 4** 4** NC 8**
Riser 1 (NC for 2x16)* (NC for 2x16)* (NC for
2x16)*
Slot 3 4** 4** 4** 6 6**
Slot 4 4** 4** 4** 6 6**
Slot 5 I/O Tray 2 2 2 2 2
Slot 6 I/O Tray 2 2 2 2 2
Slot 7 I/O Tray 1 1 1 1 1
Slot 8 (ML2) I/O Tray 1 1 1 1 1
Slot 9 (LOM) I/O Tray 1 (PCH) 1 (PCH) 1 (PCH) 1 (PCH) 1 (PCH)
Slot 10 3** 3** 3** NC 7
Slot 11 3** 3** 3** NC 7
Slot 12 3** 3** 3** 5 5
Riser 2
Slot 13 3** 3** 3** 5 5
Slot 14 NC NC NC NC 3
Slot 15 (ML2) NC NC NC NC 3
Slot 16 2x8 3** NC 3** NC 3
Slot 17 Riser 1 NC 1 1 1
M.2 slot I/O Tray 1 (PCH) 1 (PCH) 1 (PCH) 1 (PCH) 1 (PCH)
Storage Upper NC 1 NC 5 5
adapter slot tray
Storage Lower 1 1 1 1 1
adapter slot tray
* Slots 1 and 2 are not connected if the 2x16 riser card is used in riser slot 1
** In 2, 3 and 6 processor configurations, the following slots are not available:
In 2-processor configurations, processors 3 and 4 are not installed; this means slots 1-4, slots 10-13,
and slot 16 are not connected
In 3-processor configurations, processor 3 is not installed; this means slots 10-13, and slot 16 are not
connected
In 6-processor configurations, processors 6 & 8 are not installed; this means slots 1-4 are not
connected

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 53

Network adapters
The SR950 has an integrated 10Gb Ethernet controller, based on the Intel Ethernet Connection X722. The
X722 has the following features:
Integrated into the Intel PCH chipset
Supports 1GbE or 10GbE connections, depending on the selected LOM Phy adapter
Offers VXLAN/NVGRE hardware offloads
Supports VMDq and SR-IOV for advanced virtualization
Supports iWarp RDMA
To provide connectivity to the X722, the SR950 supports six different LOM (LAN on Motherboard) cards
which provide the Ethernet PHY function. Only 1 LOM card can be installed. See Figure 3 for the location of
the LOM slot.
The LOM card supports NC-SI to allow the network connection to be shared between the operating system
and the XClarity Controller (XCC) management module. The LOM also supports Wake-on-LAN (WOL).
For more information about the X722 controller, see the Lenovo Press product guide:
http://lenovopress.com/lp0654-intel-x722-integrated-controller
The following table lists the supported LOM cards.

Note: None of the LOM cards listed in the table support speeds lower than 1 Gbps.

Table 42. Supported LOM adapters

Part Feature Slots Maximum
number code Description Ports supported supported
Gigabit Ethernet
7ZT7A00544 AUKG ThinkSystem 1Gb 2-port RJ45 LOM 2x RJ45 9 1
7ZT7A00545 AUKH ThinkSystem 1Gb 4-port RJ45 LOM 4x RJ45 9 1
10 Gb Ethernet
7ZT7A00546 AUKJ ThinkSystem 10Gb 2-port SFP+ LOM 2x SFP+ bays 9 1
7ZT7A00547 AUKK ThinkSystem 10Gb 4-port SFP+ LOM 4x SFP+ bays 9 1
7ZT7A00548 AUKL ThinkSystem 10Gb 2-port Base-T LOM 2x RJ45 (10GBASE-T) 9 1
7ZT7A00549 AUKM ThinkSystem 10Gb 4-port Base-T LOM 4x RJ45 (10GBASE-T) 9 1

The SR950 also support one ML2 card for 4-socket configurations (slot 8). For 8-socket servers using the
5x16 ML2 riser, the server has two ML2 slots - slot 8 and slot 15. See the I/O expansion options section for
details.
The ML2 card in slot 8 supports NC-SI however the ML2 card in slot 15 does not support NC-SI.
The following table lists the supported ML2 adapters.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 54

Table 43. Supported ML2 adapters
Part Feature Slots Maximum
number code Description Bus width supported supported†
Gigabit Ethernet
7ZT7A00536 AUKW ThinkSystem Intel I350-T4 ML2 1Gb 4-Port RJ45 PCIe 3.0 x8 8, 15 1/2
Ethernet Adapter
10 Gb Ethernet
00JY940 ATRH Intel X710-DA2 ML2 2x10GbE SFP+ Adapter PCIe 3.0 x8 8, 15 1/2
7ZT7A00497 AUKQ ThinkSystem Broadcom 57416 10GBASE-T 2-Port PCIe 3.0 x8 8, 15 1/2
ML2 Ethernet Adapter
01CV770 AU7Z Emulex VFA5.2 ML2 2x10 GbE SFP+ Adapter and PCIe 3.0 x8 8, 15 1/2
FCoE/iSCSI SW
25 Gb Ethernet
7ZT7A00507 AUKU ThinkSystem Mellanox ConnectX-4 Lx 10/25GbE PCIe 3.0 x8 8, 15 1/2
SFP28 2-Port ML2 Ethernet Adapter
00MN990 ATZR Mellanox ConnectX-4 Lx 10/25GbE SFP28 1-port PCIe 3.0 x8 8, 15 1/2
ML2 Adapter
InfiniBand
7ZT7A00501 AUKR ThinkSystem Mellanox ConnectX-3 Pro ML2 FDR PCIe 3.0 x8 8, 15 1/2
2-Port QSFP VPI Adapter
* ThinkSystem servers do not support Features on Demand, so the Emulex VFA5.2 ML2 Dual Port 10GbE
SFP+ Adapter, 00AG560, cannot be upgraded to FCoE support. If you need FCoE or iSCSI support, use
01CV770 instead.
† Two ML2 adapters are supported with an 8-socket configuration if the 5x16+ML2 riser is installed in riser
slot 2.
The following table lists additional supported network adapters that can be installed in the regular PCIe slots.

Table 44. Supported PCIe Network Adapters

Part Feature Slots Maximum
number code Description supported supported
Gigabit Ethernet
7ZT7A00482 AUZX ThinkSystem Broadcom 5720 1GbE RJ45 2-Port PCIe 1-7, 10-14, 16-17 14
Ethernet Adapter
7ZT7A00484 AUZV ThinkSystem Broadcom 5719 1GbE RJ45 4-Port PCIe 1-7, 10-14, 16-17 14
Ethernet Adapter
7ZT7A00534 AUZY ThinkSystem I350-T2 PCIe 1Gb 2-Port RJ45 Ethernet 1-7, 10-14, 16-17 14
Adapter
7ZT7A00535 AUZW ThinkSystem I350-T4 PCIe 1Gb 4-Port RJ45 Ethernet 1-7, 10-14, 16-17 14
Adapter
10 Gb Ethernet - 10GBASE-T
7ZT7A00496 AUKP ThinkSystem Broadcom 57416 10GBASE-T 2-Port 1-7, 10-14, 16-17 14
PCIe Ethernet Adapter
00MM860 ATPX Intel X550-T2 Dual Port 10GBase-T Adapter 1-7, 10-14, 16-17 14
4XC7A79699 BMXB ThinkSystem Intel X710-T4L 10GBase-T 4-Port PCIe 1-7, 10-14, 16- 14
Ethernet Adapter 17

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 55

Part Feature Slots Maximum
number code Description supported supported
4XC7A08225 B31G ThinkSystem QLogic QL41134 PCIe 10Gb 4-Port 1-7, 10-14, 16-17 14
Base-T Ethernet Adapter
10 Gb Ethernet - SFP+
7ZT7A00537 AUKX ThinkSystem X710-DA2 PCIe 10Gb 2-Port SFP+ 1-7, 10-14, 16-17 14
Ethernet Adapter
7ZT7A00493 AUKN ThinkSystem Emulex OCe14104B-NX PCIe 10Gb 4- 1-4, 10-14 9
Port SFP+ Ethernet Adapter
00AG570* AT7S Emulex VFA5.2 2x10 GbE SFP+ PCIe Adapter 1-7, 10-14, 16-17 14
00AG580 AT7T Emulex VFA5.2 2x10 GbE SFP+ Adapter and 1-7, 10-14, 16-17 14
FCoE/iSCSI SW
25 Gb Ethernet
4XC7A08238 B5T0 ThinkSystem Broadcom 57414 10/25GbE SFP28 2- 1-7, 10-14, 16-17 14
port PCIe Ethernet Adapter
4XC7A08295 BCD6 ThinkSystem Intel E810-DA2 10/25GbE SFP28 2-Port 1-7, 10-14, 16-17 14
PCIe Ethernet Adapter
7XC7A05523 B0WY ThinkSystem Intel XXV710-DA2 10/25GbE SFP28 2- 1-7, 10-14, 16-17 14
Port PCIe Ethernet Adapter
01GR250 AUAJ Mellanox ConnectX-4 Lx 10/25GbE SFP28 2-port 1-7, 10-14, 16-17 14
PCIe Ethernet Adapter
4XC7A08229 B31C ThinkSystem Mellanox ConnectX-5 Ex 25/40GbE 2- 1-6, 10-14 11
port Low-Latency Adapter
4XC7A16683 B5XZ ThinkSystem Mellanox Innova-2 ConnectX-5 FPGA 1-6, 10-14 11
25GbE 2-port Adapter
4XC7A62580 BE4U ThinkSystem Mellanox ConnectX-6 Lx 10/25GbE 1-7, 10-14, 16-17 14
SFP28 2-Port PCIe Ethernet Adapter
4XC7A62581 BHE2 ThinkSystem Solarflare X2522-Plus 10/25GbE SFP28 1-7, 10-14, 16-17 14
2-Port PCIe Ethernet Adapter
40 Gb Ethernet
00MM950 ATRN Mellanox ConnectX-4 Lx 1x40GbE QSFP+ Adapter 1-7, 10-14, 16-17 14
4XC7A08229 B31C ThinkSystem Mellanox ConnectX-5 Ex 25/40GbE 2- 1-6, 10-14 11
port Low-Latency Adapter
100 Gb Ethernet
4XC7A08248 B8PP ThinkSystem Mellanox ConnectX-6 Dx 100GbE 1-6, 10-14 11
QSFP56 2-port PCIe Ethernet Adapter
FDR InfiniBand
7ZT7A00500 AUVG ThinkSystem Mellanox ConnectX-4 PCIe FDR 2-Port 1-7, 10-14, 16-17 14
QSFP VPI Adapter
EDR InfiniBand / 100 Gb Ethernet
00MM960 ATRP Mellanox ConnectX-4 2x100GbE/EDR IB QSFP28 VPI 1-6, 10-14 11
Adapter
HDR100 InfiniBand / 100 Gb Ethernet
4C57A14177 B4R9,BN36 ThinkSystem Mellanox ConnectX-6 HDR100/100GbE 1-7, 10-14, 16-17 14
QSFP56 1-port PCIe VPI Adapter
4C57A14178 B4RA,BN37 ThinkSystem Mellanox ConnectX-6 HDR100/100GbE 1-7, 10-14, 16-17 14
QSFP56 2-port PCIe VPI Adapter

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 56

Part Feature Slots Maximum
number code Description supported supported
HDR InfiniBand / 200 Gb Ethernet
4C57A15326 B4RC,BN38 ThinkSystem Mellanox ConnectX-6 HDR/200GbE 3, 4 1
QSFP56 1-port PCIe 4 VPI Adapter
4C57A14179 B4RB ThinkSystem Mellanox HDR/200GbE 2x PCIe Aux Kit 1-6, 13, 14 1
(installs with 4C57A15326 to provide the additional
PCIe 3.0 x16 needed for HDR)
Omni-Path Architecture
00WE023 AU0A Intel OPA 100 Series Single-port PCIe 3.0 x8 HFA 1-7, 10-14, 16-17 14
00WE027 AU0B Intel OPA 100 Series Single-port PCIe 3.0 x16 HFA 1-6, 10-14 11
* ThinkSystem servers do not support Features on Demand, so the Emulex VFA5.2 2x10 GbE SFP+ PCIe
Adapter, 00AG570, cannot be upgraded to FCoE support. If you need FCoE or iSCSI support, use 00AG580
instead.
For more information, including the transceivers and cables that each adapter supports, see the list of
Lenovo Press Product Guides in the Networking adapters category:
https://lenovopress.com/servers/options/ethernet

Fibre Channel host bus adapters

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 57
Fibre Channel host bus adapters
The following table lists the Fibre Channel HBAs supported by SR950.

Table 45. Fibre Channel HBAs

Part Feature Slots Maximum
number code Description supported supported
64 Gb Fibre Channel HBAs
4XC7A77485 BLC1 ThinkSystem Emulex LPe36002 64Gb 2-port PCIe Fibre 1-7, 10-14, 16-17 14
Channel Adapter
32 Gb Fibre Channel HBAs
4XC7A76525 BJ3H ThinkSystem Emulex LPe35002 32Gb 2-port PCIe Fibre 1-7, 10-14, 16- 14
Channel Adapter V2 17
4XC7A76498 BJ3G ThinkSystem Emulex LPe35000 32Gb 1-port PCIe Fibre 1-7, 10-14, 16- 14
Channel Adapter v2 17
4XC7A08250 B5SX ThinkSystem Emulex LPe35000 32Gb 1-port PCIe Fibre 1-7, 10-14, 16-17 14
Channel Adapter
4XC7A08251 B5SY ThinkSystem Emulex LPe35002 32Gb 2-port PCIe Fibre 1-7, 10-14, 16-17 14
Channel Adapter
7ZT7A00516 AUNS ThinkSystem QLogic QLE2740 PCIe 32Gb 1-Port SFP+ 1-7, 10-14, 16-17 14
Fibre Channel Adapter
7ZT7A00518 AUNU ThinkSystem QLogic QLE2742 PCIe 32Gb 2-Port SFP+ 1-7, 10-14, 16-17 14
Fibre Channel Adapter
7ZT7A00519 AUNV ThinkSystem Emulex LPe32002-M2-L PCIe 32Gb 2-Port 1-7, 10-14, 16-17 14
SFP+ Fibre Channel Adapter
16 Gb Fibre Channel HBAs
01CV750 ATZB QLogic 16Gb Enhanced Gen5 FC Single-port HBA 1-7, 10-14, 16-17 14
01CV760 ATZC QLogic 16Gb Enhanced Gen5 FC Dual-port HBA 1-7, 10-14, 16-17 14
01CV830 ATZU Emulex 16Gb Gen6 FC Single-port HBA 1-7, 10-14, 16-17 14
01CV840 ATZV Emulex 16Gb Gen6 FC Dual-port HBA 1-7, 10-14, 16-17 14

For more information, see the list of Lenovo Press Product Guides in the Host bus adapters category:
https://lenovopress.com/servers/options/hba

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 58

SAS adapters for external storage
The following table lists SAS HBAs and RAID adapters supported by SR950 server for use with external
storage.

Table 46. Adapters for external storage

Part Feature Slots Maximum
number code Description supported supported
SAS HBAs
7Y37A01090 AUNR ThinkSystem 430-8e SAS/SATA 12Gb HBA 1-7, 10-14, 16-17 14
7Y37A01091 AUNN ThinkSystem 430-16e SAS/SATA 12Gb HBA 1-7, 10-14, 16-17 14
4Y37A78837 BNWK ThinkSystem 440-8e SAS/SATA PCIe Gen4 12Gb HBA 1-7, 10-14, 16- 14
17
4Y37A09724 B8P7 ThinkSystem 440-16e SAS/SATA PCIe Gen4 12Gb HBA 1-7, 10-14, 16-17 14
External RAID adapters
7Y37A01087 AUNQ ThinkSystem RAID 930-8e 4GB Flash PCIe 12Gb Adapter 1-7, 10-14, 16-17 4*
4Y37A78836 BNWJ ThinkSystem RAID 940-8e 4GB Flash PCIe Gen4 12Gb 1-7, 10-14, 16- 4*
Adapter 17
* Maximum is 4 adapters because there are only 4 supercap holders in the server, mounted on the side of
the two riser cards.

Mixing storage adapter families: The following HBA/RAID adapter combinations are supported:
X30 external adapters with other X30 adapters (internal or external)
X40 external adapters with other X40 adapters (internal or external)
X40 external adapters with X350 internal adapters
The following HBA/RAID adapter combinations are not supported:
X30 adapters (internal or external) with X40 adapters (internal or external)
X30 adapters (internal or external) with X350 internal adapters

For a comparison of the functions of the supported external storage adapters, see the ThinkSystem RAID
Adapter and HBA Reference:
https://lenovopress.com/lp1288#sr950-support=SR950&internal-or-external-ports=External
For more information, see the list of Lenovo Press Product Guides in the Host bus adapters and RAID
adapters categories:
https://lenovopress.com/servers/options/hba
https://lenovopress.com/servers/options/raid

Flash storage adapters

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 59
Flash storage adapters
The server supports the PCIe Flash Storage adapters listed in the following table.

Table 47. Flash Storage adapters

Part Feature Slots Maximum
number code Description supported supported
Mainstream NVMe PCIe Adapters - Optimized for mixed-intensive application workloads with an endurance of 3-5
DWPD
4XB7A14075 B8JH ThinkSystem HHHL PM1735 1.6TB Mainstream NVMe 1-7, 10-14, 16-17 14
PCIe4.0 x8 Flash Adapter
4XB7A14076 B8HW ThinkSystem HHHL PM1735 3.2TB Mainstream NVMe 1-7, 10-14, 16-17 14
PCIe4.0 x8 Flash Adapter
4XB7A14077 B96M ThinkSystem HHHL PM1735 6.4TB Mainstream NVMe 1-7, 10-14, 16-17 14
PCIe4.0 x8 Flash Adapter
4XB7A38240 BCGL ThinkSystem HHHL Kioxia CM5-V 6.4TB Mainstream 1-7, 10-14, 16-17 14
NVMe PCIe3.0 x4 Flash Adapter

For details about these adapters, see the Lenovo Press product guides in the Flash Adapters category:
https://lenovopress.com/servers/options/ssdadapter

GPU adapters and coprocessors

Full-length adapter cards such as graphics processing units (GPUs) do not physically fit in the server and
are not supported.

Cooling
Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 60
Cooling
The SR950 uses a set of 60mm hot-swap single-rotor fans for system-wide cooling. Each compute tray or
storage tray houses 6 hot-swap fans. The 6 fans in the compute tray are N+1 redundant, meaning that a
single fan failure is tolerated in each compute tray.
Fans are located internal to the server immediately in front of the compute system boards, but are accessible
from the front of the server by the long handle attached to the fan. As the handle is pulled out, the attached
fan rotates from vertical orientation to horizontal orientation, allowing the fan to be removed from the system
using the handle, as shown below.

Figure 21. Six fans installed in each compute tray (lower compute tray shown)
New SR950 servers with second-generation Intel Xeon Scalable processors will use 19K RPM fans. These
faster fans ensure that all eight-socket configurations will run up to their supported ASHRAE ambient
temperatures as stated in the Operating environment section.

Note: SR950 servers that were upgraded to second-generation Intel Xeon Scalable processors from first-
generation processors will still use the original 16K RPM fans and will continue to have the situation
where an eight-socket 205W processor configuration may experience a slight drop in performance under
extreme workloads when the ambient temperature is above 30°C.

Power supplies
The server supports up to four hot-swap power supplies. Power supplies are N+N redundant, which means
that if the server has four power supplies installed, then the server can continue operation even with two
failed power supplies, or if the utility service that feeds those two power supplies goes offline.
All power supplies installed in a server must have the same capacity (for example all 1600W).

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 61

Table 48. Power supply options
240V DC
Feature Maximum 110V 220V China
Part number code Description supported AC AC only
7N67A00885 AVNV 1100W Platinum (230V/115V) Power Supply 4 Yes Yes No
7N67A00886 AUPJ 1600W Platinum Power Supply (200-240VAC 4 No Yes No
only)
7N67A00887 B5KD 2000W Platinum Power Supply (200-240VAC 4 No Yes No
only)

The 1100W power supply is auto-sensing and supports both 110V AC (100-127V 50/60 Hz) and 220V AC
(200-240V 50/60 Hz) power.
Note: At 100-127 V AC input, the 1100W power supply is limited to 1050W.
Power supply options do not include a power cord. For models of the SR950, the inclusion of a power cords
is model dependent. Configure-to-order models can be configured without a power cord if desired.
See Physical and electrical specifications for additional information.

Tip: Use Lenovo Capacity Planner to determine exactly what power your server needs:
https://datacentersupport.lenovo.com/us/en/products/solutions-and-software/software/lenovo-capacity-
planner/solutions/ht504651

Power cords
Line cords and rack power cables with C13 connectors can be ordered as listed in the following table.

110V customers: If you plan to use the 1100W power supply with a 110V power source, select a power
cable that is rated above 10A. Power cables that are rated at 10A or below are not supported with 110V
power.

Table 49. Power cords

Part number Feature code Description
Rack cables - C13 to C14
SL67B08593 BPHZ 0.5m, 10A/100-250V, C13 to C14 Jumper Cord
00Y3043 A4VP 1.0m, 10A/100-250V, C13 to IEC 320-C14 Rack Power Cable
4L67A08367 B0N5 1.0m, 13A/100-250V, C13 to C14 Jumper Cord
39Y7937 6201 1.5m, 10A/100-250V, C13 to IEC 320-C14 Rack Power Cable
4L67A08368 B0N6 1.5m, 13A/100-250V, C13 to C14 Jumper Cord
4L67A08365 B0N4 2.0m, 10A/100-250V, C13 to IEC 320-C14 Rack Power Cable
4L67A08369 6570 2.0m, 13A/100-250V, C13 to C14 Jumper Cord
4L67A08366 6311 2.8m, 10A/100-250V, C13 to IEC 320-C14 Rack Power Cable
4L67A08370 6400 2.8m, 13A/100-250V, C13 to C14 Jumper Cord
39Y7932 6263 4.3m, 10A/100-250V, C13 to IEC 320-C14 Rack Power Cable
4L67A08371 6583 4.3m, 13A/100-250V, C13 to C14 Rack Power Cable
Rack cables - C13 to C14 (Y-cable)
00Y3046 A4VQ 1.345m, 2X C13 to C14 Jumper Cord, Rack Power Cable

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 62

Part number Feature code Description
00Y3047 A4VR 2.054m, 2X C13 to C14 Jumper Cord, Rack Power Cable
Rack cables - C13 to C20
39Y7938 6204 2.8m, 10A/100-250V, C13 to IEC 320-C20 Rack Power Cable
Rack cables - C13 to C20 (Y-cable)
47C2491 A3SW 1.2m, 16A/100-250V, 2 Short C13s to Short C20 Rack Power Cable
47C2492 A3SX 2.5m, 16A/100-250V, 2 Long C13s to Short C20 Rack Power Cable
47C2493 A3SY 2.8m, 16A/100-250V, 2 Short C13s to Long C20 Rack Power Cable
47C2494 A3SZ 4.1m, 16A/100-250V, 2 Long C13s to Long C20 Rack Power Cable
Line cords
39Y7930 6222 2.8m, 10A/250V, C13 to IRAM 2073 (Argentina) Line Cord
81Y2384 6492 4.3m 10A/220V, C13 to IRAM 2073 (Argentina) Line Cord
39Y7924 6211 2.8m, 10A/250V, C13 to AS/NZ 3112 (Australia/NZ) Line Cord
81Y2383 6574 4.3m, 10A/230V, C13 to AS/NZS 3112 (Aus/NZ) Line Cord
69Y1988 6532 2.8m, 10A/250V, C13 to NBR 14136 (Brazil) Line Cord
81Y2387 6404 4.3m, 10A/250V, C13 - 2P+Gnd (Brazil) Line Cord
39Y7928 6210 2.8m, 220-240V, C13 to GB 2099.1 (China) Line Cord
81Y2378 6580 4.3m, 10A/220V, C13 to GB 2099.1 (China) Line Cord
39Y7918 6213 2.8m, 10A/250V, C13 to DK2-5a (Denmark) Line Cord
81Y2382 6575 4.3m, 10A/230V, C13 to DK2-5a (Denmark) Line Cord
39Y7917 6212 2.8m, 10A/230V, C13 to CEE7-VII (Europe) Line Cord
81Y2376 6572 4.3m, 10A/230V, C13 to CEE7-VII (Europe) Line Cord
39Y7927 6269 2.8m, 10A/250V, C13(2P+Gnd) (India) Line Cord
81Y2386 6567 4.3m, 10A/240V, C13 to IS 6538 (India) Line Cord
39Y7920 6218 2.8m, 10A/250V, C13 to SI 32 (Israel) Line Cord
81Y2381 6579 4.3m, 10A/230V, C13 to SI 32 (Israel) Line Cord
39Y7921 6217 2.8m, 220-240V, C13 to CEI 23-16 (Italy/Chile) Line Cord
81Y2380 6493 4.3m, 10A/230V, C13 to CEI 23-16 (Italy/Chile) Line Cord
46M2593 A1RE 2.8m, 12A/125V, C13 to JIS C-8303 (Japan) Line Cord
4L67A08362 6495 4.3m, 12A/200V, C13 to JIS C-8303 (Japan) Line Cord
39Y7926 6335 4.3m, 12A/100V, C13 to JIS C-8303 (Japan) Line Cord
39Y7922 6214 2.8m, 10A/250V, C13 to SABS 164 (S Africa) Line Cord
81Y2379 6576 4.3m, 10A/230V, C13 to SABS 164 (South Africa) Line Cord
39Y7925 6219 2.8m, 220-240V, C13 to KETI (S Korea) Line Cord
81Y2385 6494 4.3m, 12A/220V, C13 to KSC 8305 (S. Korea) Line Cord
39Y7919 6216 2.8m, 10A/250V, C13 to SEV 1011-S24507 (Swiss) Line Cord
81Y2390 6578 4.3m, 10A/230V, C13 to SEV 1011-S24507 (Sws) Line Cord
23R7158 6386 2.8m, 10A/125V, C13 to CNS 10917-3 (Taiwan) Line Cord
81Y2375 6317 2.8m, 10A/240V, C13 to CNS 10917-3 (Taiwan) Line Cord
81Y2374 6402 2.8m, 13A/125V, C13 to CNS 60799 (Taiwan) Line Cord
4L67A08363 AX8B 4.3m, 10A 125V, C13 to CNS 10917 (Taiwan) Line Cord
81Y2389 6531 4.3m, 10A/250V, C13 to 76 CNS 10917-3 (Taiwan) Line Cord

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 63

Part number Feature code Description
81Y2388 6530 4.3m, 13A/125V, C13 to CNS 10917 (Taiwan) Line Cord
39Y7923 6215 2.8m, 10A/250V, C13 to BS 1363/A (UK) Line Cord
81Y2377 6577 4.3m, 10A/230V, C13 to BS 1363/A (UK) Line Cord
90Y3016 6313 2.8m, 10A/120V, C13 to NEMA 5-15P (US) Line Cord
46M2592 A1RF 2.8m, 10A/250V, C13 to NEMA 6-15P Line Cord
00WH545 6401 2.8m, 13A/120V, C13 to NEMA 5-15P (US) Line Cord
4L67A08359 6370 4.3m, 10A/125V, C13 to NEMA 5-15P (US) Line Cord
4L67A08361 6373 4.3m, 10A/250V, C13 to NEMA 6-15P (US) Line Cord
4L67A08360 AX8A 4.3m, 13A/120V, C13 to NEMA 5-15P (US) Line Cord

Integrated virtualization
The server supports booting from an operating system or hypervisor installed on an M.2 solid-state drive.
See the M.2 drives section for details and the list of available options.
You can download supported VMware vSphere hypervisor images from the following web page and load it
on the M.2 drive using the instructions provided:
https://vmware.lenovo.com/content/custom_iso/

Systems management
The server contains an integrated service processor, XClarity Controller (XCC), which provides advanced
service-processor control, monitoring, and alerting functions. The XCC is based on the Pilot4 XE401
baseboard management controller (BMC) using a dual-core ARM Cortex A9 service processor.

Local management
The SR950 offers the front operator panel showing key LED status indicators, as shown in the following
figure.

Figure 22. Front operator panel (LCD display panel closed)

The front operator panel pulls out (see the release latch in the above figure) to show an LCD display panel
and buttons, as shown in the following figure. The LCD display panel allows quick access to system status,
firmware, network, and health information.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 64

Figure 23. LCD display panel
The LCD display and the function buttons give you access to the following information:
Error messages
System VPD: machine type & mode, serial number, UUID string
System firmware levels: UEFI and XCC firmware
XCC network information: hostname, MAC address, IP address, DNS addresses
Environmental data: Ambient temperature, CPU temperature, AC input voltage, estimated power
consumption
System reset action
If an environmental condition exceeds a threshold or if a system component fails, XCC illuminates LEDs
inside the server to help you diagnose the problem and find the failing part. The SR950 has fault LEDs next
to the following components:
Each processor
Each memory DIMM
Each system fan
Each power supply
Each rear-facing PCIe slot
Each drive bay
For local console use, the SR950 has both a front and rear VGA port. Only one can be active at a time. If
displays are connected to both VGA ports, the front VGA port takes precedence.

System status with XClarity Mobile

The XClarity Mobile app includes a tethering function where you can connect your Android or iOS device to
the server via USB to see the status of the server.
The steps to connect the mobile device are as follows:
1. Enable USB Management on the server, by holding down the ID button for 3 seconds (or pressing the
dedicated USB management button if one is present)
2. Connect the mobile device via a USB cable to the server's USB port with the management symbol

3. In iOS or Android settings, enable Personal Hotspot or USB Tethering

4. Launch the Lenovo XClarity Mobile app

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 65

Once connected you can see the following information:
Server status including error logs (read only, no login required)
Server management functions (XClarity login credentials required)

Remote management
The server offers a dedicated RJ45 port at the rear of the server for remote management via the XClarity
Controller management processor. The port supports 10/100/1000 Mbps speeds.
Remote server management is provided through industry-standard interfaces:
Intelligent Platform Management Interface (IPMI) Version 2.0
Simple Network Management Protocol (SNMP) Version 3 (no SET commands; no SMNP v1)
Common Information Model (CIM-XML)
Representational State Transfer (REST) support
Redfish support (DMTF compliant)
Web browser - HTML 5-based browser interface with NLS support and using a responsive design that
is suitable for all devices. Java and ActiveX are not required.
IPMI via the Ethernet port (IPMI over LAN) is supported, however it is disabled by default. For CTO orders
you can specify whether you want to the feature enabled or disabled in the factory, using the feature codes
listed in the following table.

Table 50. IPMI-over-LAN settings

Part number Feature code Description
CTO only B7XZ Disable IPMI-over-LAN (default)
CTO only B7Y0 Enable IPMI-over-LAN

A virtual presence (remote control and remote media) capability also comes standard in the server for
remote server management.
The remote control functions include the following:
Remotely viewing video with graphics resolutions up to 1600x1200 at 75 Hz with up to 23 bits per
pixel, regardless of the system state
Remotely accessing the server using the keyboard and mouse from a remote client
Capturing blue-screen errors
International keyboard mapping support
LDAP-based authentication
Boot Capture
Remote mounting of ISO and IMG files
Virtual console collaboration - Ability for up to 6 remote users to be log into the remote session
simultaneously
Power capping
License for XClarity Energy Manager

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 66

Lenovo XClarity Administrator
Lenovo XClarity Administrator is a centralized resource management solution designed to reduce
complexity, speed response, and enhance the availability of Lenovo systems and solutions. It provides
agent-free hardware management for ThinkSystem servers, in addition to ThinkServer, System x, and Flex
System servers. The administration dashboard is based on HTML 5 and allows fast location of resources so
tasks can be run quickly.
Because Lenovo XClarity Administrator does not require any agent software to be installed on the managed
endpoints, there are no CPU cycles spent on agent execution, and no memory is used, which means that up
to 1GB of RAM and 1 - 2% CPU usage is saved, compared to a typical managed system where an agent is
required.
Lenovo XClarity Administrator is an optional software component for the SR950. The software can be
downloaded and used at no charge to discover and monitor the SR950 and to manage firmware upgrades.
If software support is required for Lenovo XClarity Administrator, or premium features such as configuration
management and operating system deployment are required, Lenovo XClarity Pro software subscription
should be ordered. Lenovo XClarity Pro is licensed on a per managed system basis, that is, each managed
Lenovo system requires a license.
The following table lists the Lenovo XClarity software license options.

Table 51. Lenovo XClarity Pro ordering information

Part number Feature code Description
00MT201 1339 Lenovo XClarity Pro, per Managed Endpoint w/1 Yr SW S&S
00MT202 1340 Lenovo XClarity Pro, per Managed Endpoint w/3 Yr SW S&S
00MT203 1341 Lenovo XClarity Pro, per Managed Endpoint w/5 Yr SW S&S
7S0X000HWW SAYV Lenovo XClarity Pro, per Managed Endpoint w/6 Yr SW S&S
7S0X000JWW SAYW Lenovo XClarity Pro, per Managed Endpoint w/7 Yr SW S&S

Lenovo XClarity Administrator offers the following standard features that are available at no charge:
Auto-discovery and monitoring of Lenovo systems
Firmware updates and compliance enforcement
External alerts and notifications via SNMP traps, syslog remote logging, and e-mail
Secure connections to managed endpoints
NIST 800-131A or FIPS 140-2 compliant cryptographic standards between the management solution
and managed endpoints
Integration into existing higher-level management systems such as cloud automation and
orchestration tools through REST APIs, providing extensive external visibility and control over
hardware resources
An intuitive, easy-to-use GUI
Scripting with Windows PowerShell, providing command-line visibility and control over hardware
resources
Lenovo XClarity Administrator offers the following premium features that require an optional Pro license:
Pattern-based configuration management that allows to define configurations once and apply
repeatedly without errors when deploying new servers or redeploying existing servers without
disrupting the fabric
Bare-metal deployment of operating systems and hypervisors to streamline infrastructure provisioning

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 67

For more information, refer to the Lenovo XClarity Administrator Product Guide:
http://lenovopress.com/tips1200

Lenovo XClarity Integrators

Lenovo also offers software plug-in modules, Lenovo XClarity Integrators, to manage physical infrastructure
from leading external virtualization management software tools including those from Microsoft and VMware.
These integrators are offered at no charge, however if software support is required, a Lenovo XClarity Pro
software subscription license should be ordered.
Lenovo XClarity Integrators offer the following additional features:
Ability to discover, manage, and monitor Lenovo server hardware from VMware vCenter or Microsoft
System Center
Deployment of firmware updates and configuration patterns to Lenovo x86 rack servers and Flex
System from the virtualization management tool
Non-disruptive server maintenance in clustered environments that reduces workload downtime by
dynamically migrating workloads from affected hosts during rolling server updates or reboots
Greater service level uptime and assurance in clustered environments during unplanned hardware
events by dynamically triggering workload migration from impacted hosts when impending hardware
failures are predicted
For more information about all the available Lenovo XClarity Integrators, see the Lenovo XClarity
Administrator Product Guide: https://lenovopress.com/tips1200-lenovo-xclarity-administrator

Lenovo XClarity Essentials

Lenovo offers the following XClarity Essentials software tools that can help you set up, use, and maintain
the server at no additional cost:
Lenovo Essentials OneCLI
OneCLI is a collection of server management tools that uses a command line interface program to
manage firmware, hardware, and operating systems. It provides functions to collect full system health
information (including health status), configure system settings, and update system firmware and
drivers.
Lenovo Essentials UpdateXpress
The UpdateXpress tool is a standalone GUI application for firmware and device driver updates that
enables you to maintain your server firmware and device drivers up-to-date and help you avoid
unnecessary server outages. The tool acquires and deploys individual updates and UpdateXpress
System Packs (UXSPs) which are integration-tested bundles.
Lenovo Essentials Bootable Media Creator
The Bootable Media Creator (BOMC) tool is used to create bootable media for offline firmware
update.
For more information and downloads, visit the Lenovo XClarity Essentials web page:
http://support.lenovo.com/us/en/documents/LNVO-center

Lenovo XClarity Energy Manager

Lenovo XClarity Energy Manager (LXEM) is a power and temperature management solution for data
centers. It is an agent-free, web-based console that enables you to monitor and manage power consumption
and temperature in your data center through the management console. It enables server density and data
center capacity to be increased through the use of power capping.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 68

LXEM is a licensed product. A single-node LXEM license is included with the XClarity Controller Enterprise
upgrade as described in the Remote Management section. If your server does not have the XCC Enterprise
upgrade, Energy Manager licenses can be ordered as shown in the following table.

Table 52. Lenovo XClarity Energy Manager

Part number Description
4L40E51621 Lenovo XClarity Energy Manager Node License (1 license needed per server)

For more information about XClarity Energy Manager, see the following resources:
Lenovo Support page:
https://datacentersupport.lenovo.com/us/en/solutions/lnvo-lxem
User Guide for XClarity Energy Manager:
https://pubs.lenovo.com/lxem/

Security
Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 69
Security
The server offers the following security features:
Administrator and power-on password
Trusted Platform Module (TPM) supporting both TPM 1.2 and TPM 2.0
Optional Trusted Cryptographic Module (TCM) or Nationz TPM, available only in China
Self-encrypting drives with support for IBM Security Key Lifecycle Manager
The server is NIST SP 800-147B compliant.
The plugin TCM and Nationz TPM modules, available only for China customers, are installed in a dedicated
socket on the I/O tray, as shown in Figure 9. Ordering information is shown in the following table.

Table 53. Security features

Part number Feature code Description
None* AVKE ThinkSystem Trusted Cryptographic Module (China customers only)
None* B22N ThinkSystem Nationz Trusted Platform Module v2.0
* The component is CTO on pre-configured models only. Not available as a field upgrade.
For SED drives and IBM Security Key Lifecycle Manager support see the SED encryption key management
with ISKLM section.

Intel Transparent Supply Chain

Add a layer of protection in your data center and have peace of mind that the server hardware you bring into
it is safe authentic and with documented, testable, and provable origin.
Lenovo has one of the world’s best supply chains, as ranked by Gartner Group, backed by extensive and
mature supply chain security programs that exceed industry norms and US Government standards. Now we
are the first Tier 1 manufacturer to offer Intel® Transparent Supply Chain in partnership with Intel, offering
you an unprecedented degree of supply chain transparency and assurance.
To enable Intel Transparent Supply Chain for the Intel-based servers in your order, add the following feature
code in the DCSC configurator, under the Security tab.

Table 54. Intel Transparent Supply Chain ordering information

Feature code Description
BB0P Intel Transparent Supply Chain

For more information on this offering, see the paper Introduction to Intel Transparent Supply Chain on
Lenovo ThinkSystem Servers, available from https://lenovopress.com/lp1434-introduction-to-intel-
transparent-supply-chain-on-thinksystem-servers.

Rack installation
All models of the SR950 include a rail kit for installation in a 19-inch rack cabinet. The contents of the kits are
shown in the following figure.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 70

Figure 24. SR950 rail kit
Optionally available is the SR950 shipping bracket kit, which is used when the server is installed in a rack
and the complete rack is then shipped to the client.

Figure 25. SR950 shipping bracket kit

Table 55. Shipping bracket kit

Part number Feature code Description
7XF7A03967 AUL5 ThinkSystem SR950 Shipping Bracket

Operating system support

The SR950 supports the following operating systems:
Microsoft Windows Server 2016
Microsoft Windows Server 2019
Microsoft Windows Server 2022
Red Hat Enterprise Linux 7.6

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 71

 Red Hat Enterprise Linux 7.7
Red Hat Enterprise Linux 7.8
Red Hat Enterprise Linux 7.9
Red Hat Enterprise Linux 8.0
Red Hat Enterprise Linux 8.1
Red Hat Enterprise Linux 8.2
Red Hat Enterprise Linux 8.3
Red Hat Enterprise Linux 8.4
Red Hat Enterprise Linux 8.5
Red Hat Enterprise Linux 8.6
Red Hat Enterprise Linux 8.7
Red Hat Enterprise Linux 8.8
Red Hat Enterprise Linux 8.9
Red Hat Enterprise Linux 8.10
Red Hat Enterprise Linux 9.0
Red Hat Enterprise Linux 9.1
Red Hat Enterprise Linux 9.2
Red Hat Enterprise Linux 9.3
Red Hat Enterprise Linux 9.4
SUSE Linux Enterprise Server 12 SP4
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 Xen SP4
SUSE Linux Enterprise Server 12 Xen SP5
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server 15 SP1
SUSE Linux Enterprise Server 15 SP2
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 Xen
SUSE Linux Enterprise Server 15 Xen SP1
SUSE Linux Enterprise Server 15 Xen SP2
SUSE Linux Enterprise Server 15 Xen SP3
SUSE Linux Enterprise Server 15 Xen SP4
SUSE Linux Enterprise Server 15 Xen SP5
Ubuntu 22.04 LTS 64-bit
VMware ESXi 6.5 U2
VMware ESXi 6.5 U3
VMware ESXi 6.7 U1
VMware ESXi 6.7 U2
VMware ESXi 6.7 U3
VMware ESXi 7.0
VMware ESXi 7.0 U1
VMware ESXi 7.0 U2
VMware ESXi 7.0 U3
VMware ESXi 8.0
VMware ESXi 8.0 U1
VMware ESXi 8.0 U2
For a complete list of supported, certified and tested operating systems, plus additional details and links to
relevant web sites, see the Operating System Interoperability Guide:
https://lenovopress.com/osig#servers=sr950-7x11-7x12-7x13-sp-gen-2
For configure-to-order configurations, the server can be preloaded with VMware ESXi installed on M.2 cards.
Ordering information is listed in the following table.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 72

Table 56. VMware ESXi preload
Part number Feature code Description
CTO only B3VW VMware ESXi 6.5 U2 (Factory Installed)
CTO only B6U0 VMware ESXi 6.5 U3 (factory installed)
CTO only B4XA VMware ESXi 6.7 U1 (Factory Installed)
CTO only B6U1 VMware ESXi 6.7 U2 (factory installed)
CTO only B88T VMware ESXi 6.7 U3 (factory installed)
CTO only BBZG VMware ESXi 7.0 (Factory Installed)
CTO only BE5E VMware ESXi 7.0 U1 (Factory Installed)
CTO only BHSR VMware ESXi 7.0 U2 (Factory Installed)
CTO only BMEY VMware ESXi 7.0 U3 (Factory Installed)
CTO only BMT5 VMware ESXi 8.0 (Factory Installed)
CTO only BQ8S VMware ESXi 8.0 U1 (Factory Installed)
CTO only BYC7 VMware ESXi 8.0 U2 (Factory Installed)

Physical and electrical specifications

The SR950 has the following overall physical dimensions, excluding components that extend outside the
standard chassis, such as EIA flanges, front security bezel (if any), and power supply handles:
Width: 447 mm (17.6 inches)
Height: 176 mm (6.9 inches)
Depth: 851 mm (33.5 inches)
The following table lists the detailed dimensions. See the figure below for the definition of each dimension.

Table 57. Detailed dimensions

Dimension Description
483 mm Xa = Width, to the outsides of the front EIA flanges
447 mm Xb = Width, to the rack rail mating surfaces
447 mm Xc = Width, to the outer most chassis body feature
176 mm Ya = Height, from the bottom of chassis to the top of the chassis
780 mm Za = Depth, from the rack flange mating surface to the rearmost I/O port surface
815 mm Zb = Depth, from the rack flange mating surface to the rearmost feature of the chassis body
817 mm Zc = Depth, from the rack flange mating surface to the rearmost feature such as power supply handle
36 mm Zd = Depth, from the forwardmost feature on front of EIA flange to the rack flange mating surface
46 mm Ze = Depth, from the front of security bezel (if applicable) or forwardmost feature to the rack flange
mating surface

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 73

Figure 26. Server dimensions
The shipping dimensions (cardboard packaging) of the SR950 are as follows:
Width: 610 mm (24.0 inches)
Height: 557 mm (21.9 inches)
Depth: 1016 mm (40.0 inches)
The server has the following weight:
Minimum configuration: 32.6 kg (71.9 lb)
Maximum configuration: 58.7 kg (129.4 lb)
The server has the following electrical specifications:
Models with 2000 W AC power supplies:
220 - 240 (nominal) V AC; 50 Hz or 60 Hz; 10 A
200 - 240 (nominal) V AC; 50 Hz or 60 Hz; 11 A*
*11 A support is in only the following countries and regions: North America, Central America,
Ecuador, Guyana, Venezuela, American Samoa, Guam, Micronesia, Palau, Liberia, and Japan
Models with 1600 W AC power supplies:
200 - 240 (nominal) V AC; 50 Hz or 60 Hz; 8.7 A
Models with 1100 W AC power supplies:
100 - 127 (nominal) V AC; 50 Hz or 60 Hz; 12.0 A
200 - 240 (nominal) V AC; 50 Hz or 60 Hz; 6.2 A

Operating environment

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 74

Operating environment
The ThinkSystem SR950 server is designed to ensure thermal compliance to ASHRAE A4 ambient
environments, however processor models with a TDP of 150W or higher are limted to only ASHRAE A2
conditions.
The following restrictions also apply regarding ASHRAE A3 and A4 support:
NVMe drives and adapters are supported up to 35°C only
256 GB DIMMs are supported up to 35°C only
Intel Optane DC Persistent Memory is supported up to 35°C only

Upgrades from first-generation processors: If you are upgrading your SR950 server from first-
generation Intel Xeon Scalable processors to an eight-socket configuration of any 205W second-
generation processor, you may experience a slight drop in performance under extreme workloads when
the ambient temperature is above 30°C. The processors affected by this upgrade thermal limitation are
the following processors:
8x Intel Xeon Platinum 8268 24C 205W 2.9GHz Processor
8x Intel Xeon Platinum 8270 26C 205W 2.6GHz Processor
8x Intel Xeon Platinum 8280 28C 205W 2.7GHz Processor
8x Intel Xeon Platinum 8280L 28C 205W 2.7GHz Processor
8x Intel Xeon Platinum 8280M 28C 205W 2.7GHz Processor
This thermal restriction does not apply to new SR950 orders (with the upgraded system boards and 19K
RPM fans).

Temperature and humidity

The server is supported operating in the following environments:
ASHRAE A2:
Temperature: 10°C to 35°C
Humidity: 8% to 80%
Altitude 0-3000 m (10,000 ft), derated 1°C per 300 m above 950 m
ASHRAE A3:
Temperature: 5°C to 40°C
Humidity: 8% to 85%
Altitude 0-3000 m (10,000 ft), derated 1°C per 175 m above 950 m
ASHRAE A4:
Temperature: 5°C to 45°C
Humidity: 8% to 90%
Altitude 0-3000 m (10,000 ft), derated 1°C per 125 m above 950 m
Non-operating environment support:
Without packaging:
Temperature: -10 °C to 60 °C
Humidity: 8 to 90%
Storage with packaging:
Temperature: -40 °C to 70 °C
Humidity: 8 to 90%
Heat output
The server generates the following heat/thermal output:
Minimum configuration: 938 BTU/hr, 275 W
Typical configuration: 3412 BTU/hr, 1000 W

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 75

 Full configuration: 21,838 BTU/hr, 6400 W
Shock and vibration
The server has the following vibration and shock limits:
Vibration:
Operating: 0.21 G rms at 5 Hz to 500 Hz for 15 minutes across 3 axes
Non-operating: 1.04 G rms at 2 Hz to 200 Hz for 15 minutes across 6 surfaces
Shock:
Operating: 15 G for 3 milliseconds in each direction (positive and negative X, Y, and Z axes)
Non-operating:
12 kg - 22 kg: 50 G for 152 in./sec velocity change across 6 surfaces
23 kg - 31 kg: 35 G for 152 in./sec velocity change across 6 surfaces

Particulate contamination
Airborne particulates (including metal flakes or particles) and reactive gases acting alone or in combination
with other environmental factors such as humidity or temperature might damage the system that might cause
the system to malfunction or stop working altogether.
The following specifications indicate the limits of particulates that the system can tolerate:
Reactive gases:
The copper reactivity level shall be less than 200 Angstroms per month (Å/month)
The silver reactivity level shall be less than 200 Å/month
Airborne particulates:
The room air should be continuously filtered with MERV 8 filters.
Air entering a data center should be filtered with MERV 11 or preferably MERV 13 filters.
The deliquescent relative humidity of the particulate contamination should be more than 60%
RH
Environment must be free of zinc whiskers
For additional information, see the Specifications section of the documentation for the server, available from
the Lenovo Documents site, https://pubs.lenovo.com/

Warranty and Support

The ThinkSystem SR950 server has the following choice of warranties:
Machine type 7X11: 1-year warranty
Machine type 7X12: 3-year warranty
Machine type 7X13: 3-year warranty
The standard warranty terms are customer-replaceable unit (CRU) and onsite (for field-replaceable units
FRUs only) with standard call center support during normal business hours and 9x5 Next Business Day
Parts Delivered.
Lenovo’s additional support services provide a sophisticated, unified support structure for your data center,
with an experience consistently ranked number one in customer satisfaction worldwide. Available offerings
include:

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 76

 Premier Support
Premier Support provides a Lenovo-owned customer experience and delivers direct access to
technicians skilled in hardware, software, and advanced troubleshooting, in addition to the following:
Direct technician-to-technician access through a dedicated phone line
24x7x365 remote support
Single point of contact service
End to end case management
Third-party collaborative software support
Online case tools and live chat support
On-demand remote system analysis
Warranty Upgrade (Preconfigured Support)
Services are available to meet the on-site response time targets that match the criticality of your
systems.
3, 4, or 5 years of service coverage
1-year or 2-year post-warranty extensions
Foundation Service: 9x5 service coverage with next business day onsite response.
YourDrive YourData is an optional extra (see below).
Essential Service: 24x7 service coverage with 4-hour onsite response or 24-hour committed
repair (available only in select markets). Bundled with YourDrive YourData.
Advanced Service: 24x7 service coverage with 2-hour onsite response or 6-hour committed
repair (available only in select markets). Bundled with YourDrive YourData.
Managed Services
Lenovo Managed Services provides continuous 24x7 remote monitoring (plus 24x7 call center
availability) and proactive management of your data center using state-of-the-art tools, systems, and
practices by a team of highly skilled and experienced Lenovo services professionals.
Quarterly reviews check error logs, verify firmware & OS device driver levels, and software as
needed. We’ll also maintain records of latest patches, critical updates, and firmware levels, to ensure
you systems are providing business value through optimized performance.
Technical Account Management (TAM)
A Lenovo Technical Account Manager helps you optimize the operation of your data center based on
a deep understanding of your business. You gain direct access to your Lenovo TAM, who serves as
your single point of contact to expedite service requests, provide status updates, and furnish reports
to track incidents over time. In addition, your TAM will help proactively make service
recommendations and manage your service relationship with Lenovo to make certain your needs are
met.
Enterprise Server Software Support
Enterprise Software Support is an additional support service providing customers with software
support on Microsoft, Red Hat, SUSE, and VMware applications and systems. Around the clock
availability for critical problems plus unlimited calls and incidents helps customers address challenges
fast, without incremental costs. Support staff can answer troubleshooting and diagnostic questions,
address product comparability and interoperability issues, isolate causes of problems, report defects
to software vendors, and more.

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 77

 YourDrive YourData
Lenovo’s YourDrive YourData is a multi-drive retention offering that ensures your data is always
under your control, regardless of the number of drives that are installed in your Lenovo server. In the
unlikely event of a drive failure, you retain possession of your drive while Lenovo replaces the failed
drive part. Your data stays safely on your premises, in your hands. The YourDrive YourData service
can be purchased in convenient bundles and is optional with Foundation Service. It is bundled with
Essential Service and Advanced Service.
Health Check
Having a trusted partner who can perform regular and detailed health checks is central to maintaining
efficiency and ensuring that your systems and business are always running at their best. Health
Check supports Lenovo-branded server, storage, and networking devices, as well as select Lenovo-
supported products from other vendors that are sold by Lenovo or a Lenovo-Authorized Reseller.
Examples of region-specific warranty terms are second or longer business day parts delivery or parts-only
base warranty.
If warranty terms and conditions include onsite labor for repair or replacement of parts, Lenovo will dispatch
a service technician to the customer site to perform the replacement. Onsite labor under base warranty is
limited to labor for replacement of parts that have been determined to be field-replaceable units (FRUs).
Parts that are determined to be customer-replaceable units (CRUs) do not include onsite labor under base
warranty.
If warranty terms include parts-only base warranty, Lenovo is responsible for delivering only replacement
parts that are under base warranty (including FRUs) that will be sent to a requested location for self-service.
Parts-only service does not include a service technician being dispatched onsite. Parts must be changed at
customer’s own cost and labor and defective parts must be returned following the instructions supplied with
the spare parts.
Lenovo Service offerings are region-specific. Not all preconfigured support and upgrade options are
available in every region. For information about Lenovo service upgrade offerings that are available in your
region, refer to the following resources:
Service part numbers in Lenovo Data Center Solution Configurator (DCSC):
http://dcsc.lenovo.com/#/services
Lenovo Services Availability Locator
http://lenovolocator.com/
For service definitions, region-specific details, and service limitations, please refer to the following
documents:
Lenovo Statement of Limited Warranty for Infrastructure Solutions Group (ISG) Servers and System
Storage
http://pcsupport.lenovo.com/us/en/solutions/ht503310
Lenovo Data Center Services Agreement
http://support.lenovo.com/us/en/solutions/ht116628

Services
Lenovo Services is a dedicated partner to your success. Our goal is to reduce your capital outlays, mitigate
your IT risks, and accelerate your time to productivity.

Note: Some service options may not be available in all markets or regions. For more information, go to
https://www.lenovo.com/services. For information about Lenovo service upgrade offerings that are
available in your region, contact your local Lenovo sales representative or business partner.

Here’s a more in-depth look at what we can do for you:

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 78

 Asset Recovery Services
Asset Recovery Services (ARS) helps customers recover the maximum value from their end-of-life
equipment in a cost-effective and secure way. On top of simplifying the transition from old to new
equipment, ARS mitigates environmental and data security risks associated with data center
equipment disposal. Lenovo ARS is a cash-back solution for equipment based on its remaining
market value, yielding maximum value from aging assets and lowering total cost of ownership for your
customers. For more information, see the ARS page, https://lenovopress.com/lp1266-reduce-e-
waste-and-grow-your-bottom-line-with-lenovo-ars.
Assessment Services
An Assessment helps solve your IT challenges through an onsite, multi-day session with a Lenovo
technology expert. We perform a tools-based assessment which provides a comprehensive and
thorough review of a company's environment and technology systems. In addition to the technology
based functional requirements, the consultant also discusses and records the non-functional
business requirements, challenges, and constraints. Assessments help organizations like yours, no
matter how large or small, get a better return on your IT investment and overcome challenges in the
ever-changing technology landscape.
Design Services
Professional Services consultants perform infrastructure design and implementation planning to
support your strategy. The high-level architectures provided by the assessment service are turned
into low level designs and wiring diagrams, which are reviewed and approved prior to implementation.
The implementation plan will demonstrate an outcome-based proposal to provide business
capabilities through infrastructure with a risk-mitigated project plan.
Basic Hardware Installation
Lenovo experts can seamlessly manage the physical installation of your server, storage, or
networking hardware. Working at a time convenient for you (business hours or off shift), the
technician will unpack and inspect the systems on your site, install options, mount in a rack cabinet,
connect to power and network, check and update firmware to the latest levels, verify operation, and
dispose of the packaging, allowing your team to focus on other priorities.
Deployment Services
When investing in new IT infrastructures, you need to ensure your business will see quick time to
value with little to no disruption. Lenovo deployments are designed by development and engineering
teams who know our Products & Solutions better than anyone else, and our technicians own the
process from delivery to completion. Lenovo will conduct remote preparation and planning, configure
& integrate systems, validate systems, verify and update appliance firmware, train on administrative
tasks, and provide post-deployment documentation. Customer’s IT teams leverage our skills to enable
IT staff to transform with higher level roles and tasks.
Integration, Migration, and Expansion Services
Move existing physical & virtual workloads easily, or determine technical requirements to support
increased workloads while maximizing performance. Includes tuning, validation, and documenting
ongoing run processes. Leverage migration assessment planning documents to perform necessary
migrations.

Regulatory compliance
Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 79
Regulatory compliance
The SR950 server conforms to the following regulations:
FCC - Verified to comply with Part 15 of the FCC Rules, Class A
Canada ICES-003, issue 6, Class A
UL/IEC 60950-1
CSA C22.2 No. 60950-1
IEC 62368-1 2014(CB Certificate and CB Test Report)
NOM-019
Argentina IEC60950-1
Japan VCCI, Class A
Australia/New Zealand AS/NZS CISPR 32, Class A; AS/NZS 60950.1
China CCC GB4943.1, GB9254 Class A, GB17625.1
Taiwan BSMI CNS13438, Class A; CNS14336-1 CNS15663
Korea KN32, Class A; KN35
Russia, Belorussia and Kazakhstan, TR CU 020/2011 (for EMC) and TR CU 004/2011 (for safety)
IEC 60950-1 (CB Certificate and CB Test Report)
CE Mark (EN55032 Class A, EN60950-1, EN55024, EN61000-3-2, EN61000-3-3)
CISPR 32, Class A
TUV-GS (EN60950-1, IEC60950-1, EK1-ITB2000)
RoHS Directive
Energy Star 3.0
ErP lot3
JESL

External drive enclosures

The server supports attachment to external drive enclosures using a RAID controller with external ports or a
SAS host bus adapter. Adapters supported by the server are listed in the SAS adapters for external storage
section.
Note: Information provided in this section is for ordering reference purposes only. For the operating system
and adapter support details, refer to the interoperability matrix for a particular storage enclosure that can be
found on the Lenovo Data Center Support web site:
http://datacentersupport.lenovo.com

Table 58. External drive enclosures

Model Description
4587HC1 Lenovo Storage D1212 Disk Expansion Enclosure (2U enclosure with 12x LFF drive bays)
4587HC2 Lenovo Storage D1224 Disk Expansion Enclosure (2U enclosure with 24x SFF drive bays)
6413HC1 Lenovo Storage D3284 High Density Expansion Enclosure (5U enclosure with 84x LFF drive
bays)
7DAHCTO1WW Lenovo ThinkSystem D4390 Direct Attached Storage (4U enclosure with 90x LFF drive bays)

For details about supported drives, adapters, and cables, see the following Lenovo Press Product Guides:
Lenovo Storage D1212 and D1224
http://lenovopress.lenovo.com/lp0512
Lenovo Storage D3284
http://lenovopress.lenovo.com/lp0513
Lenovo ThinkSystem D4390
https://lenovopress.lenovo.com/lp1681

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 80

External storage systems
Lenovo offers the ThinkSystem DE Series and ThinkSystem DM Series external storage systems for high-
performance storage. See the DE Series and DM Series product guides for specific controller models,
expansion enclosures and configuration options:
ThinkSystem DE Series Storage
https://lenovopress.com/storage/thinksystem/de-series#rt=product-guide
ThinkSystem DM Series Storage
https://lenovopress.com/storage/thinksystem/dm-series#rt=product-guide
ThinkSystem DG Series Storage
https://lenovopress.com/storage/thinksystem/dg-series#rt=product-guide

External backup units

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 81
External backup units
The server supports both USB-attached RDX backup units and SAS-attached tape drives.
The following table lists the available external SAS tape backup options.
Tip: Verify the end-to-end support of an IBM tape backup solution through the IBM System Storage
Interoperation Center (SSIC): http://www.ibm.com/systems/support/storage/ssic

Table 59. External SAS backup options

Part number Description
External SAS tape backup drives
6160S7E IBM TS2270 Tape Drive Model H7S
6160S8E IBM TS2280 Tape Drive Model H8S
6160S9E IBM TS2290 Tape Drive Model H9S
External SAS tape backup autoloaders
6171S7R IBM TS2900 Tape Autoloader w/LTO7 HH SAS
6171S8R IBM TS2900 Tape Autoloader w/LTO8 HH SAS
6171S9R IBM TS2900 Tape Autoloader w/LTO9 HH SAS
External tape backup libraries
6741A1F IBM TS4300 3U Tape Library-Base Unit
SAS backup drives for TS4300 Tape Library
01KP937 LTO 7 HH SAS Drive
01KP953 LTO 8 HH SAS Drive
02JH836 LTO 9 HH SAS Drive

For more information, see the list of Product Guides in the Backup units category:
https://lenovopress.com/servers/options/backup
The following table lists the external RDX backup options available.

Table 60. External RDX dock and cartridges

Part number Feature code Description
External RDX docks
4T27A10725 B32R ThinkSystem RDX External USB 3.0 Dock (No cartridge included with the drive)
Cartridges
7TP7A01601 AVF8 ThinkSystem RDX 500GB Cartridge
7TP7A01602 AVF1 ThinkSystem RDX 1TB Cartridge
7TP7A01603 AVF0 ThinkSystem RDX 2TB Cartridge
7TP7A04318 AXD1 ThinkSystem RDX 4TB Cartridge

For more information, see the Lenovo RDX USB 3.0 Disk Backup Solution product guide:
https://lenovopress.com/tips0894-rdx-usb-30

Fibre Channel SAN switches

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 82
Fibre Channel SAN switches
Lenovo offers the ThinkSystem DB Series of Fibre Channel SAN switches for high-performance storage
expansion. See the DB Series product guides for models and configuration options:
ThinkSystem DB Series SAN Switches:
https://lenovopress.com/storage/switches/rack#rt=product-guide

Uninterruptible power supply units

The following table lists the uninterruptible power supply (UPS) units that are offered by Lenovo.

Table 61. Uninterruptible power supply units

Part number Description
55941AX RT1.5kVA 2U Rack or Tower UPS (100-125VAC)
55941KX RT1.5kVA 2U Rack or Tower UPS (200-240VAC)
55942AX RT2.2kVA 2U Rack or Tower UPS (100-125VAC)
55942KX RT2.2kVA 2U Rack or Tower UPS (200-240VAC)
55943AX RT3kVA 2U Rack or Tower UPS (100-125VAC)
55943KX RT3kVA 2U Rack or Tower UPS (200-240VAC)
55945KX RT5kVA 3U Rack or Tower UPS (200-240VAC)
55946KX RT6kVA 3U Rack or Tower UPS (200-240VAC)
55948KX RT8kVA 6U Rack or Tower UPS (200-240VAC)
55949KX RT11kVA 6U Rack or Tower UPS (200-240VAC)
55948PX RT8kVA 6U 3:1 Phase Rack or Tower UPS (380-415VAC)
55949PX RT11kVA 6U 3:1 Phase Rack or Tower UPS (380-415VAC)
55943KT† ThinkSystem RT3kVA 2U Standard UPS (200-230VAC) (2x C13 10A, 2x GB 10A, 1x C19 16A
outlets)
55943LT† ThinkSystem RT3kVA 2U Long Backup UPS (200-230VAC) (2x C13 10A, 2x GB 10A, 1x C19 16A
outlets)
55946KT† ThinkSystem RT6kVA 5U UPS (200-230VAC) (2x C13 10A outlets, 1x Terminal Block output)
5594XKT† ThinkSystem RT10kVA 5U UPS (200-230VAC) (2x C13 10A outlets, 1x Terminal Block output)
† Only available in China and the Asia Pacific market.
For more information, see the list of Product Guides in the UPS category:
https://lenovopress.com/servers/options/ups

Power distribution units

The following table lists the power distribution units (PDUs) that are offered by Lenovo.

Table 62. Power distribution units

ASEAN

JAPAN
RUCIS
Brazil

INDIA
MEA

Part Feature
PRC
ANZ

HTK
EET

WE

NA
LA

number code Description

0U Basic PDUs
00YJ776 ATZY 0U 36 C13/6 C19 24A 1 Phase PDU N Y Y N N N N N N Y Y Y N
0U Switched and Monitored PDUs

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 83

 ASEAN

JAPAN
RUCIS
Brazil

INDIA
MEA
Part Feature

PRC
ANZ

HTK
EET

WE

NA
LA
number code Description
00YJ781 AU03 0U 20 C13/4 C19 Switched and Monitored N N Y N Y N Y N N Y Y Y N
24A 1 Phase PDU
1U Switched and Monitored PDUs
4PU7A90808 C0D4 1U 18 C19/C13 Switched and monitored 48A Y Y Y Y Y Y Y Y Y Y Y Y Y
3P WYE PDU V2 ETL
4PU7A81117 BNDV 1U 18 C19/C13 switched and monitored 48A N N N N N N N N N N N Y N
3P WYE PDU - ETL
4PU7A90809 C0DE 1U 18 C19/C13 Switched and monitored 48A N N N N N Y Y N N N N N N
3P WYE PDU V2 CE
4PU7A81118 BNDW 1U 18 C19/C13 switched and monitored 48A Y Y Y Y Y Y Y Y Y N Y N Y
3P WYE PDU - CE
4PU7A90810 C0DD 1U 18 C19/C13 Switched and monitored 80A Y Y Y Y Y Y Y Y Y Y Y Y Y
3P Delta PDU V2
4PU7A77467 BLC4 1U 18 C19/C13 Switched and Monitored 80A N N N N N N N N N Y N Y N
3P Delta PDU
4PU7A90811 C0DC 1U 12 C19/C13 Switched and monitored 32A N N N N N Y Y N N N N N N
3P WYE PDU V2
4PU7A77468 BLC5 1U 12 C19/C13 switched and monitored 32A Y Y Y Y Y Y Y Y Y N Y Y Y
3P WYE PDU
4PU7A90812 C0DB 1U 12 C19/C13 Switched and monitored 60A N N N N N N N N N Y N N N
3P Delta PDU V2
4PU7A77469 BLC6 1U 12 C19/C13 switched and monitored 60A N N N N N N N N N N N Y N
3P Delta PDU
1U Ultra Density Enterprise PDUs (9x IEC 320 C13 + 3x IEC 320 C19 outlets)
71763NU 6051 Ultra Density Enterprise C19/C13 PDU N N Y N N N N N N Y Y Y N
60A/208V/3PH
71762NX 6091 Ultra Density Enterprise C19/C13 PDU Y Y Y Y Y Y Y Y Y Y Y Y Y
Module
1U C13 Enterprise PDUs (12x IEC 320 C13 outlets)
39Y8941 6010 DPI C13 Enterprise PDU Module (WW) Y Y Y Y Y Y Y Y Y Y Y Y Y
1U Front-end PDUs (3x IEC 320 C19 outlets)
39Y8938 6002 DPI Single-phase 30A/120V Front-end PDU Y Y Y Y Y Y Y Y Y Y Y Y Y
(US)
39Y8939 6003 DPI Single-phase 30A/208V Front-end PDU Y Y Y Y Y Y Y Y Y Y Y Y Y
(US)
39Y8934 6005 DPI Single-phase 32A/230V Front-end PDU Y Y Y Y Y Y Y Y Y Y Y Y Y
(International)
39Y8940 6004 DPI Single-phase 60A/208V Front-end PDU Y N Y Y Y Y Y N N Y Y Y N
(US)
39Y8935 6006 DPI Single-phase 63A/230V Front-end PDU Y Y Y Y Y Y Y Y Y Y Y Y Y
(International)
1U NEMA PDUs (6x NEMA 5-15R outlets)
39Y8905 5900 DPI 100-127V NEMA PDU Y Y Y Y Y Y Y Y Y Y Y Y Y
Line cords for 1U PDUs that ship without a line cord

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 84

 ASEAN

JAPAN
RUCIS
Brazil

INDIA
MEA
Part Feature

PRC
ANZ

HTK
EET

WE

NA
LA
number code Description
40K9611 6504 4.3m, 32A/380-415V, EPDU/IEC 309 3P+N+G Y Y Y Y Y Y Y Y Y Y Y Y Y
3ph wye (non-US) Line Cord
40K9612 6502 4.3m, 32A/230V, EPDU to IEC 309 P+N+G Y Y Y Y Y Y Y Y Y Y Y Y Y
(non-US) Line Cord
40K9613 6503 4.3m, 63A/230V, EPDU to IEC 309 P+N+G Y Y Y Y Y Y Y Y Y Y Y Y Y
(non-US) Line Cord
40K9614 6500 4.3m, 30A/208V, EPDU to NEMA L6-30P (US) Y Y Y Y Y Y Y Y Y Y Y Y Y
Line Cord
40K9615 6501 4.3m, 60A/208V, EPDU to IEC 309 2P+G (US) N N Y N N N Y N N Y Y Y N
Line Cord
40K9617 6505 4.3m, 32A/230V, Souriau UTG Female to Y Y Y Y Y Y Y Y Y Y Y Y Y
AS/NZ 3112 (Aus/NZ) Line Cord
40K9618 6506 4.3m, 32A/250V, Souriau UTG Female to KSC Y Y Y Y Y Y Y Y Y Y Y Y Y
8305 (S. Korea) Line Cord

For more information, see the Lenovo Press documents in the PDU category:
https://lenovopress.com/servers/options/pdu

Rack cabinets
The racks supported by the server are listed in the following table.

Table 63. Rack cabinets

Maximum
Part number Description supported
Rack cabinets currently available
9308-4EX 42U Enterprise Expansion Rack 10
9308-4PX 42U Enterprise Rack 10
9360-4PX 42U 1200mm Deep Dynamic Rack 10
9361-4PX 42U 1200mm Deep Static Rack 10
9363-4PX 42U 1100mm Dynamic Rack 10
9363-4EX 42U 1100mm Dynamic Expansion Rack 10
Withdrawn rack cabinets
9360-4EX 42U 1200mm Deep Dynamic Expansion Rack 10
9361-4EX 42U 1200mm Deep Static Expansion Rack 10
9362-4PX 47U 1200mm Deep Static Rack 11
9362-4EX 47U 1200mm Deep Static Expansion Rack 11
9363-4CX PureFlex System 42U Rack 10
9363-4DX PureFlex System 42U Expansion Rack 10

For information about these racks, see the Lenovo Rack Cabinet Reference:
https://lenovopress.com/lp0658-lenovo-rack-cabinet-reference

KVM console options

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 85
KVM console options
The following table lists the supported KVM consoles.

Table 64. KVM console

Part number Description
4XF7A84188 ThinkSystem 18.5" LCD Console (with US English keyboard)

The following table lists the available KVM switches and the options that are supported with them.

Table 66. KVM switches and options

Part number Description
KVM Console switches
1754D2X Global 4x2x32 Console Manager (GCM32)
1754D1X Global 2x2x16 Console Manager (GCM16)
1754A2X Local 2x16 Console Manager (LCM16)
1754A1X Local 1x8 Console Manager (LCM8)
Cables for GCM and LCM Console switches
46M5383 Virtual Media Conversion Option Gen2 (VCO2)
46M5382 Serial Conversion Option (SCO)

For more information, see the list of Product Guides in the KVM Switches and Consoles category:
http://lenovopress.com/servers/options/kvm

Lenovo Financial Services

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 86
Lenovo Financial Services
Lenovo Financial Services reinforces Lenovo’s commitment to deliver pioneering products and services that
are recognized for their quality, excellence, and trustworthiness. Lenovo Financial Services offers financing
solutions and services that complement your technology solution anywhere in the world.
We are dedicated to delivering a positive finance experience for customers like you who want to maximize
your purchase power by obtaining the technology you need today, protect against technology obsolescence,
and preserve your capital for other uses.
We work with businesses, non-profit organizations, governments and educational institutions to finance their
entire technology solution. We focus on making it easy to do business with us. Our highly experienced team
of finance professionals operates in a work culture that emphasizes the importance of providing outstanding
customer service. Our systems, processes and flexible policies support our goal of providing customers with
a positive experience.
We finance your entire solution. Unlike others, we allow you to bundle everything you need from hardware
and software to service contracts, installation costs, training fees, and sales tax. If you decide weeks or
months later to add to your solution, we can consolidate everything into a single invoice.
Our Premier Client services provide large accounts with special handling services to ensure these complex
transactions are serviced properly. As a premier client, you have a dedicated finance specialist who
manages your account through its life, from first invoice through asset return or purchase. This specialist
develops an in-depth understanding of your invoice and payment requirements. For you, this dedication
provides a high-quality, easy, and positive financing experience.
For your region-specific offers, please ask your Lenovo sales representative or your technology provider
about the use of Lenovo Financial Services. For more information, see the following Lenovo website:
https://www.lenovo.com/us/en/landingpage/lenovo-financial-services/

Seller training courses

The following sales training courses are offered for employees and partners (login required). Courses are
listed in date order.
1. SAP Webinar for Lenovo Sellers: Lenovo Portfolio Update for SAP Landscapes
2024-06-04 | 60 minutes | Employees Only

Join Mark Kelly, Advisory IT Architect with the Lenovo Global SAP Center of Competence as he
discusses:
• Challenges in the SAP environment
• Lenovo On-premise Solutions for SAP
• Lenovo support resources for SAP solutions
Published: 2024-06-04
Length: 60 minutes
Employee link: Grow@Lenovo
Course code: DSAPF101

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 87

 2. Lenovo Data Center Product Portfolio
2024-05-29 | 20 minutes | Employees and Partners

This course introduces the Lenovo data center portfolio, and covers servers, storage, storage
networking, and software-defined infrastructure products. After completing this course about Lenovo
data center products, you will be able to identify product types within each data center family,
describe Lenovo innovations that this product family or category uses, and recognize when a specific
product should be selected.
Published: 2024-05-29
Length: 20 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: SXXW1110r7
3. VTT Cloud Architecture: NVidia Using Cloud for GPUs and AI
2024-05-22 | 60 minutes | Employees Only

Join JD Dupont, NVIDIA Head of Americas Sales, Lenovo partnership and Veer Mehta, NVIDIA
Solution Architect on an interactive discussion about cloud to edge, designing cloud Solutions with
Nvidia GPUs and minimizing private\hybrid cloud OPEX with GPUs. Discover how you can use what
is done at big public cloud providers for your customers. We will also walk through use cases and see
a demo you can use to help your customers.
Published: 2024-05-22
Length: 60 minutes
Employee link: Grow@Lenovo
Course code: DVCLD212
4. Partner Technical Webinar - ISG Portfolio Update
2024-04-15 | 60 minutes | Employees and Partners

In this 60-minute replay, Mark Bica, NA ISG Server Product Manager reviewed the Lenovo ISG
portfolio. He covered new editions such as the SR680a \ SR685a, dense servers, and options that are
strategic for any workload.
Published: 2024-04-15
Length: 60 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: 041224
5. Partner Technical Webinar – StorMagic
2024-03-19 | 60 minutes | Employees and Partners

March 08, 2024 – In this 60-minute replay, Stuart Campbell and Wes Ganeko of StorMagic joined us
and provided an overview of StorMagic on Lenovo. They also demonstrated the interface while
sharing some interesting use cases.
Published: 2024-03-19
Length: 60 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: 030824

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 88

 6. Intel Transparent Supply Chain on Lenovo Servers
2024-01-29 | 12 minutes | Employees and Partners

This course introduces the Intel Transparent Supply Chain (TSC) program, explains how the program
works, and discusses the benefits of the Intel TSC program to customers. Adding the Intel TSC
feature to an order is explained.

Course objectives:
• Describe the Intel® Transparent Supply Chain program
• Explain how the Intel® Transparent Supply Chain program works
• Discuss the benefits of the Intel® Transparent Supply Chain program to Lenovo customers
• Explain how to add Intel® Transparent Supply Chain program feature to an order
Published: 2024-01-29
Length: 12 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: SXXW1230
7. Family Portfolio: Storage Controller Options
2024-01-23 | 25 minutes | Employees and Partners

This course covers the storage controller options available for use in Lenovo servers. The classes of
storage controller are discussed, along with a discussion of where they are used, and which to
choose.

After completing this course, you will be able to:

• Describe the classes of storage controllers
• Discuss where each controller class is used
• Describe the available options in each controller class
Published: 2024-01-23
Length: 25 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: SXXW1111
8. Lenovo-Intel Sustainable Solutions QH
2024-01-22 | 10 minutes | Employees and Partners

This Quick Hit explains how Lenovo and Intel are committed to sustainability, and introduces the
Lenovo-Intel joint sustainability campaign. You will learn how to use this campaign to show customers
what that level of commitment entails, how to use the campaign's unsolicited proposal approach, and
how to use the campaign as a conversation starter which may lead to increased sales.
Published: 2024-01-22
Length: 10 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: SXXW2524a

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 89

 9. FY24Q3 Intel Servers Update
2023-12-11 | 15 minutes | Employees and Partners

This update is designed to help you discuss the features and customer benefits of Lenovo servers
that use the 5th Gen Intel® Xeon® processors. Lenovo has also introduced a new server, the
ThinkSystem SD650-N V3, which expands the supercomputer server family. Reasons to call your
customer and talk about refreshing their infrastructure are also included as a guideline.
Published: 2023-12-11
Length: 15 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: SXXW2522a
10. Benefits of Intel Ring and Mesh Architecture Topology
2023-11-03 | 12 minutes | Employees and Partners

This course is an overview of ring and mesh topology in Intel-based servers. Topics covered include
ring, mesh, NUMA, CHA, cross-bar, and NUMA awareness.

Upon completion of this training, you will be able to:

• Describe Ring and Mesh
• Discuss the benefits of Ring and Mesh
• Describe Workloads
Published: 2023-11-03
Length: 12 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: SXXW1112
11. Partner Technical Webinar - Data Center Limits and ISG TAA Compliance
2023-05-16 | 60 minutes | Employees and Partners

In this 60-minute replay, we had two topics. First Vinod Kamath, Lenovo Distinguished Engineer for
Data Center Cooling presented on the Systems Configuration and Data Center Ambient Limits.
Second, Shama Patari, Lenovo Trade Council, and Glenn Johnson, Lenovo Principal Engineer for
Supply Chain presented on ISG TAA Compliance.
Published: 2023-05-16
Length: 60 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: 051223

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 90

 12. Family Portfolio: ThinkSystem Intel Mission Critical Servers
2023-01-09 | 10 minutes | Employees and Partners

This course is designed to give Lenovo sales and partner representatives the foundation of the Intel
Mission Critical server family of products. As an introduction to the products, this course also includes
Lenovo innovations and when to select a specific product.

When you finish this course, you should be able to identify products and features within the family,
describe Lenovo innovations that this product family uses, and recognize when a specific product or
products should be selected.
Published: 2023-01-09
Length: 10 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: SXXW1209r6
13. Lenovo Sustainable Computing
2022-09-16 | 4 minutes | Employees and Partners

This Quick Hit describes the Lenovo sustainable computing program, and the many ways in which
Lenovo strives to respect and protect the environment.
Published: 2022-09-16
Length: 4 minutes
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Course code: SXXW2504a

Related publications and links

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 91
Related publications and links
Videos on the ThinkSystem SR950:
ThinkSystem SR950 Walkthrough:
https://lenovopress.com/lp0702-thinksystem-sr950-server-video-walkthrough
ThinkSystem SR950 Ease of Service
https://lenovopress.com/lp0899-thinksystem-sr950-ease-of-service-video
Lenovo Engineer discusses the ThinkSystem SR950 Server
https://www.youtube.com/watch?v=2F5UD0Xr50Q
For more information, see these useful resources:
Lenovo ThinkSystem SR950 product page:
https://www.lenovo.com/us/en/data-center/servers/mission-critical/Lenovo-ThinkSystem-
SR950/p/77XX7HSSR95
Interactive 3D Tour of the ThinkSystem SR950:
https://lenovopress.com/LP0674
ThinkSystem SR950 drivers and support
http://datacentersupport.lenovo.com/products/servers/thinksystem/sr950/7x11/downloads
Lenovo ThinkSystem SR950 product publications:
http://thinksystem.lenovofiles.com/help/index.jsp
Quick Start
Rack Installation Guide
Setup Guide
Hardware Maintenance Manual
Messages and Codes Reference
Memory Population Reference
Lenovo Hardware Installation & Removal Videos on the ThinkSystem SR950:
YouTube: https://www.youtube.com/playlist?list=PLYV5R7hVcs-DbSYJFY74PoKmph7vgrkKH
Youku: https://list.youku.com/albumlist/show/id_50952215
ServerProven hardware compatibility:
http://www.lenovo.com/us/en/serverproven

Related product families

Product families related to this document are the following:
4-Socket Rack Servers
8-Socket Rack Servers
Mission Critical Servers
ThinkSystem SR950 Server

Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 92

Notices
Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your
local Lenovo representative for information on the products and services currently available in your area. Any
reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product,
program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any
Lenovo intellectual property right may be used instead. However, it is the user's responsibility to evaluate and verify
the operation of any other product, program, or service. Lenovo may have patents or pending patent applications
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8001 Development Drive
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Attention: Lenovo Director of Licensing

LENOVO PROVIDES THIS PUBLICATION ”AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR
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The products described in this document are not intended for use in implantation or other life support applications
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Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in any
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that these measurements will be the same on generally available systems. Furthermore, some measurements may
have been estimated through extrapolation. Actual results may vary. Users of this document should verify the
applicable data for their specific environment.

© Copyright Lenovo 2024. All rights reserved.

This document, LP1054, was created or updated on March 24, 2024.

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Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 93

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Lenovo ThinkSystem SR950 Server (Xeon SP Gen 2) 94