Here is my system
Pentium $ 3.06 Ghz (533) not overclocked with Coolermaster Aero Fan and massive heatsink
Asus P4S8X-X MOBO
RADEON 9800 PRO with Arctic VGA cooler installed (not overclocked)
1024 ddr RAM PC2700
Soundblaster Live 5.1
Qtech 550Wts PSU
About 5 80mmcase fans, an exhaust fan and its not sitting next to a radiator
The problem is my pc shuts off all power after a short period when 3d gaming on demanding games such as Farcry and on the 3Dmark03 benchmarker. It would seem like cooling, VGA getting too hot so i installed the arctic VGA card cooler and now the powering off is delayed, before it was a few seconds now its minutes. I am virus free, i have tried Catalyst drivers 3.7 to the latest 4.4 making sure to destroy all previous installations, i have tried turning Fast writes off in the bios, increasing AGP voltage, decreasing the AGP aperture, turning off VPU recovery, My CPU temps are 36 when idle going up to 50ish when stressed, my case temp is 25-30. MY power supply is a 550 watt variety so i am unsure whether this is the problem, the Radeon 9800pro is brandnew and i have changed from a 9600 XT so i have not gone from Nvidia to ATI. My heatsink is dust free and i have checked for swelling of the capacitors on the mobo. This problem only started with the new graphics card so it is part of the problem if not the cause, i have heard that it may be my mobo or the northwood chipset that may be the issue here. I have tried fanning strong cool air onto the mobo whilst running the mother nature gametest on 3dmark03, but what ever happens it cannot get throught he whole test without swithing off power. Power is only restored when the mains switch is turned off for a few seconds then some thing resets and the power button works again. Ive scoured forums hoping to find an answer to this but inspite of many people having this problem with many hardware combinations, no one has posted a good solution. HELP!!!!!!
Many thanks for all your replies!
Jonathan from sunny England