XP x64 - Ati driver problems?

I was getting some random blue screens/restarts ... well, still am. every once in a while it freezes and then it says the driver stopped and was recovered, but most of the time the system suddenly stops and restarts.

i thought it was heat related w\ the video card and i switched it out last night w\ another 3870 i have that i bought new, the others i have are used from ebay. anyhow, this card runs cooler but it still did the random restart and vpu recover.

I'm just trying to see if anybody else has had problems w\ 64 bit XP and display drivers?

I'm probably going to go to 32 bit just to try and fully troubleshoot this and figure out why my new system is crashing over and over. It is only crashing when I'm playing WoW, and a couple times last night it completely hung on system restart on the windows screen w\ the progress bar...