After a 10-15 minutes of playing some game, my computer suddenly restarts. I disabled "automaticlly restart", there isn't errors in "Event Viewer", there isn't BSOD. Computer is not overcloked, everyting in BIOS is set to "auto". I tested with Prime95 about 20 hours, and after 8 hours there was an error in "Worker thread #2 -> FATAL ERROR: Rounding was 0.4873046875, expected less than 0.4 ", but the Worker thread #1 didnt had any errors. I tested on a clean WinXP-SP2, without drivers or programs. Also I tried to install all the newest drivers and its same thing. The MB, CPU, VGA temperatures are OK, i'm monitoring them with everest. Configuration is: MB: ASUS P5K CPU: E6750 RAM: A-DATA 2x1GB DDR2 800 HDD: WD 320GB SATA2 16MB VGA: PALIT 8800GT 512MB DDR3 Please if anyone can help me ???