I've had a Powercolor 9800pro for a few months now. It has been working fine up until this last week but now I start getting artifacts and errors, even just while i'm browsing the net. I'm pretty certain its not overheating as it can happen immediately after I turn the box on, then be fine for hours after a restart. I'm also pretty sure its not a power suply problem as I have a Trupower 380W and I've tried removing all but the gfx card and HD and the problem doesn't go away. Does anyone have any more suggestions?