BSOD & Bios Autorecovery?

It is generally after i have been playing any games for a while, or the pc has been on for a while.

The misses and i forget to shut it down, and then I walk in and take it from slow mode into loading up cod4 of something, and play....after 2/3 hours it will start stuttering on the screen, start closing current programmes, then crash.

It has done this 3/4 times now, generally runs fine with no gaming apps running.

I think its a memory dump issue, or having defragged it might be things need reinstalling, dunno.

Operating sys is XP Pro.

I will check the grpx driver tonight.

sounds like a heat problem, check the fan on the graphics card see how clogged up it is