Built a new pc about a 1 and a half weeks ago. No problems at all until i started to play call of duty 4. As im playing the game usually after about 2/3 hours of playing on and off suddenly the monitor will just go black onto stand-by like the PC is turned off, but its not its still on. And the sound just repeats its self in a loop like its crashed. The only way to fix it is to restart the PC, but the problem keeps re-accuring. At first i thought it could be a overheating problem, but my GFX card hardly goes over 45C and the CPU around 34C. Specs- Abit IP35 mobo 8800GT 512MB 2GB Crucial Ballistix Intel E4500 @ stock /w decent cooler Seagate 250GB HDD Coolermaster 330elite case /w Coolermaster 460W eXtreme PSU.