A week ago, my video card started locking up when ever I played any game requiring 3d. It would run for a few seconds, then lock for many seconds. I tried everything from downgrading to dx8.1, downgrading drivers, all making sure the old drivers were totally gone. I tried everything short of an os reinstall.

Now, I have a new Abit IC7, I've upgraded to XP... Same Problem. This time, when I did a fresh install of xp, I tried the card with 30.82 drivers and 8.1. No good, same problem. I updated the drivers... No good. I upgraded Dx to 9.0a. Still no good. Anytime my card is required to use 3d, it freezes, even sometimes crashing, sending me to a 4bit 640x480 desktop, or just plain restarting my computer. I can not think of anything else that would be causing me problems besides a toasted card.

I've tried it on two different mobos, with 2 different os's, with multiple versions of drivers and DirectX.... nothing at all works. Nothing will fix my problem.

Anyone have any ideas? I'm about to trash it and get an ATI if I can't get it working.

Sounds like it but just to be sure can you try a different card in your computer? Just to clarify, had it previously been working? How old is it?

Same thing happened to me a while back. I know it sounds stupid but make sure the fan on the GPU is working. On mine the cable had worked its way out a little and was'nt making a good contact. My symptoms were exactly how you described it

you try setting it to the stock speed? have you messed with the vid card bios?