@vit9696 as you know the Nvidia cards do not produce boot screen in OC on EFI 1.1 platforms like cMP. Lately we have been working on this issue. @joevt created a driver FakeEdk2Driver joevtApps.zip to hack the EFI version to be 2.x and add the CreateEventEx function to boot services. Then we put the FakeEdk2Driver.efi in the drivers folder of @dakanji RefindPlus to load first and we put the extracted uncompressed NVIDIA GOP EFI ROM loading as a second driver to load (in order) there. As a result the NVIDIA boot screen appeared at boot. See the attached log file.
20v12d2308.txt.zip
Can this functionality be integrated in OC?