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[WildZeppelin]

Recently Installed a 3.2EGhz P4 cpu (had a 2.4Ghz P4 socket 478 @800mhz fsb). My mobo bios is version 28, all drivers updated and recent, cmos was cleared properly. Windows boots fine. Can run movies fine and do everything from web browsing to playing cds in windows. When I start a game however, even old ones from 1996 the system will crash shortly into the game. Menus from games like Doom3, FEAR,... will work, but as the game starts it shuts off entire PC, and I have to disconnect the power supply, refresh the caps, and then it will turn back on.
I have checked thermal readings, and the cpu doesn't go above 55C, my 2.4 was overclocked to 3Ghz, and it ran great at a max of 68C. My X800XT AIW card is at default settings. Reinstalled windows with updates and all drivers and still have the same problem. Any advice would be much appreciated. Thanks