HP Support already replaced the power supply but I still have exactly the same issue. I use this computer in a very quiet environment and it is considerably louder than my Dell Optiplex 990 (which ...

The HP Compaq 4000 Pro SFF (which stands for Small Form Factor) is a compact-size budget desktop with decent performance and eight USB ports. Our review model, priced at $650 as of July 25, 2011 ...