Right ho people, been a while since I was here. I have a custom built PC system:
Athlon XP Barton 2800+ 1gb Crucial PC2700 DDR RAM 50gb Maxtor 7200 RPM Hard Drive ASUS A7V333 Motherboard Windows XP Pro
Ok lets start, I have tried 3 different graphics cards and 3 different CPU's. Here's my problem: Whenever I play any games my PC shuts itself down randomally and won't turn back on until its been unplugged and plugged back in.
I have tried 3 CPU's and Athlon XP 2800+, a 2600+ and a Duron 1.6ghz. The graphics cards are a Geforce 256, an ATI Radeon 9700 Pro and a Geforce FX 5200. The PC does this with every card and every CPU.
The only time it doesn't restart randomally is when I use the Geforce 256 along with my Athlon 2800+ but unclocked to 1.2ghz.
I have tried different drivers, bios settings and moving my network card to different PCI slots. I have tried a bigger and smaller PSU. The PC is not overheating...
I had this problem a lot too and eventually tracked it down - bizarrely - to Zone Alarm. Don't suppose that's your firewall, is it? Since switching to Norton Internet Security the PC has behaved much better.