I posted my previous problem here.
I wasn't able to fix it, and went ahead and reinstalled WindowsXP. Then when I attempted to install the drivers for my Gainward GeForce4 Ti4200, it froze with a black screen except for the mouse pointer and a small area around it.
I've reinstalled windows again, because I thought that I might have gotten multiple versions of the Nvidia drivers installed over eachother in a mess, but it still doesn't work. It also doesn't work in Win2k. However, with my old TNT2 Ultra, it works fine.
Do you think this is purely a unsolvable hardware problem and I should RMA it? Any suggestions?