So, I turned my computer on this afternoon and it powers up, but nothing appears on the screen. After a lot of testing and retesting, the culprit appears to be my 6800 ultra. When I plugged my monitor into my onboard video, things worked. Now I know that my 400W PSU isn't really the recommended amount for this card, but it was working just fine yesterday so I don't know what happened. Any ideas? I'm going to try putting in a x800 pro that I have, but I would prefer to get the 6800 ultra working. Its fans turn on, but it just isn't outputting a signal.