Hi, have just bought a pretty decent gaming rig and I am experiencing problems with the graphics card, 3 times now when I boot up it has said "Error, Unable to overclock CPU" on the BIOS Screen, I am using Windows Vista and it is very Unstable especially when running Crysis Sandbox Editor. I think that this is a PSU related problem because even when I underclock the CPU it still experiences problems.. The computer is using two SATA II Hard drives, 6GB of DDR3 RAM and a 2.6Ghz i7 CPU. When I custom built it, I was told that a 650Watt PSU was adequate and that 1000-1500W was overkill. I somehow doubt that.
Could you please tell me what the problem could possibly be, and if it is the PSU, what Wattage PSU would you recommend?