Well, I figured you guys might be able to help with this. So, I wanted to upgrade my graphics along with a new psu. The card is a EVGA GTX 560 ti superclocked, with a XFX TS 550w power supply. I got everything working just fine, ran games pretty sweet compared to before, but after 30 some minutes the computer shut down and wouldn't turn back on.. it would for a split second but yeah. I done the paper clip test, and the psu works fine but even with the old card back in, the new psu wont boot up the computer. Any ideas..? I assumed if the paper clip boot worked, the psu would too but yeah. I really appreciate the help.