Re: How to test a video card
Does this happen randomly? Or while you're playing games. If you're playing games when this happens, how hot does the card get (or what are the temps in general?). If you're on XP, you can check them with ATiTool, as well as stress the card. If you're on Vista, you can check the temps with RivaTuner.
Could also try replacing the card. Either RMA it and see if that fixes the problem, or borrow a video card from somebody (or if you have a spare use that).
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