telcart,
It seems like maybe the problem is electrical in nature. My buddie's computer seems to have a problem now with the agp slot. His monitor started acting funny, displaying odd shapes and colors with his card. This of course happened after we removed my defective card.
My Abit board imediately froze up when I got home with the MX200 in it. It may be that the card is burning out the agp slot somehow. The fan on the gpu works fine and there is plenty of thermal grease on the gpu/heatsink.
Thanks for the reply though, any other ideas.... except the obvious that the card is toast?