One day i was playing Crysis 2 maxed out on my pc getting 30-40 fps. then all of a sudden my PC restarted mid game. I load up the game and now the framerate is below 20. i tried a bunch of things and nothing worked. so i reformatted my windows 7 like new. installed crysis 2 and same thing, frame rates below 20. i found out it was the CPU. so i opened it, and cleaned off the thermal paste and put a pea size amount in the middle, then sealed everything up and booted my pc. i started playing battlefield 3 and i played for about 5 minutes with good framerates like before, but then my computer restarted again. now the framerate is back to crap. changing the thermal paste didnt work, so do i need a new CPU entirely? i can be idling on the desktop and eventually my computer will restart.