I have to step in here for a minute...Please spot blaming it on people’s hardware, hell my 9800P is working fine & before that my GeForce3 worked great. IT'S THE CARD, nothing more. Weather it's drivers, bios, or the board - It's still the card...
No one here should have to replace this, or replace that to get the 5900 to work properly.
I'm sorry, but I for one am not going to wrap my case in aluminum foil or what ever...
BTW: Mine was on an APC BackUps Pro 1100...
ATI 9800 Pro 128
1024 Megs XMS PC-3500