Last night, I got a GTX 770 to replace my old GTX 560ti. I asked some people here if I should install it even though I have a 550w power supply. I installed it and worked about as well as my 560 but worse. I was also seeing CPU usage skyrocket on the desktop. Running Skype and steam brings me to 60%. So I put my old GPU back in and these numbers are still here. I shouldn't have a virus because NOD32 scanned my whole system two days ago and found nothing. The only thing that is taking up processes is svchost.exe.