My friend and i were playing BF3 and we were wondering why he is only getting 20ish fps (on caspian boarder) he had a good GFX card so we checked his CPU and it is a 'AMD Phenom II X4 965be' but was underclocked to 1GHz for some reason (ratio of 5). So i cranked it back up to its stock settings and it ran okay - until i started prime95 which is when after a few seconds his pc froze. We managed to get it to 2.2Ghz and it raised his BF3 FPS to 40fps - but still crashed a few secs after starting prime95. Could this be a PSU problem?