Re: HELP My 5900 ultra just died
You might reload drivers. Make sure you use driver cleaner. You can DL from guru3d.com. Also make sure your cooling is ok.
If it is your card, I didn't think a GFFX 5900 would be out of warranty yet. Mine has a 3 year warranty (of course if I have problems I must reflash with my original bios).
Post how things go.