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HD 4850 has artifact problem--goes away on hard reboot

Last response: in Graphics & Displays
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February 24, 2012 4:27:55 PM

Hello,
Have a HD 4850 (brand unknown) on a 939 motherboard, running windows xp pro. 430 watt psu. For the past week, video is always perfect during post, bios, windows intro. After xp desktop loads, I'll get dots, artifacts, and inability to play 3d game. Warm reboot won't help. But if I turn machine off, and then on again, problem goes away, and I can 3d game indefinitely without problem. CCC says my temp is OK (79-80 C immediately after exiting intense 3d game). I think problem went a way for a few days when I ran defrag. Any ideas. Drivers are latest.
February 24, 2012 4:44:12 PM

Do you have onboard video you can try?

Have you tried another power supply or video card?
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February 24, 2012 4:49:55 PM

No onboard video, but my old GT 7950 worked fine.
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February 24, 2012 5:01:56 PM

Try uninstalling the VGA driver s , and then Run DriverSweeper to delete any remaining files , re install latest driver , if u have oced ur card , go back to stock . if the problem persist then i'm afraid ur vga is faulty
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March 4, 2012 11:37:35 PM

Best answer selected by niknak.
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March 4, 2012 11:38:49 PM

card was bad. RMAed it.
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March 5, 2012 7:35:19 AM

This topic has been closed by Maziar
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