The PSU is the oldest piece that I havnt replaced since 2010 and i've updated my drivers/windows/anti virus. Tried about 3 different video drivers after doing driver sweep to make sure it was a clean install and my GPU is in the correct PCIe slot for using a single GPU and not crossfire. I'm not sure I updated my bios tho and my ram is about a year old. Windows detects 8 gigs of ram but i've never tested that to see if its working perfectly. My temps are all good. Under full load my CPU is at 55 and thats running prime95 and my GPU barely goes over 60 while playing games like Far cry 3 but i still get major lag in games that my rig shouldn't.