I've got a Gigabyte 7VRXP MB with 640MB of PC2100 running WINXP. My video card fan took a crap on me and I just replaced it yesterday. I had been running it without a fan for around 4 weeks without a problem. Yesterday when I was at class my computer restarted by itself. I logged back on and was using it for around 3 hours before it did this again. Now I can barely get on to the login screen before it happens again. It automatically restarts then freezes in bios after I get through to windows. I have to reset the bios by taking out the battery to get it to the login screen again. I can vaguely see a windows bluescreen when it restarts. It comes out for like less than a second. I really don't know what to do, I tried my friends video card and that didn't help. I'm really lost on this one.