PC Restarts when playing games
I am having a problem here. I can stay on the computer for hours and hours and hours without any kinds of problems, whether it be downloading, browsing the net.
The problem happens when I begin to play any game. I play it for a few minutes and then the PC automatically restarts itself. I have never had this kind of problem in the past.
I have a Intel Pentium 4 2.66 Ghz, Corsair 2GB RAM with the builtin cooling casing, 2 HDD's mounted in the same slot with a fan blowing in right through them (HDD's never get hot they are always cool to the touch even after 24hrs of being on, BFG GeForce 6800 GT OC, no brand name power supply thats been on for about 1 year which is 650 watts, 5 case fans, and I'm also running XP Pro.
I have checked my CPU and Graphics temperatures and they are running normal. The CPU is running at around 35-38 Celsius at Idle while the graphics card is running at 67-72 Celsius at idle.
I also have uninstalled and installed the Nvidia driver, current one. Also looked in the BIOS and everything is looking good in there.
I am not sure what is causing this problem, if anybody has some suggestions I would greatly appreciate it.