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Artifact problem with Powercolor HD4850

Last response: in Graphics & Displays
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October 5, 2010 3:56:40 PM

Hi,

I'm having some problems with artifacts on my Radeon HD4850 512 mb. I've searched around for similar threads, but no one seems to have the exact artifacts that I am experiencing.

They appear as little squares that show up primarily in high end games, but also in some low end ones, and once in while (seldomly) in Windows (mostly in the stock Windows image previewer). They seem to flicker depending on your within each game; that is to say, if my in game character turns, they flicker, but otherwise tend to remain still. Although, as previously mentioned, they keep still in the same spot on screen.

I tried changing the cooling paste on the card, which brought down idle temps about 10 degress C to around 48-50, but it didn't change artifacting.
The strange thing is, as I ran out of ideas, I decided to try the the stock ATI overclock tool and let it self calibrate. It overclocked the GPU to 630, and clocked the memory to 993. After this, the artifacting disappeared within Windows and is now confined (almost, see above) to games. More over, the artifacting is less intensive in games after this as well.

I've installed latest drivers of course, and before someone brings it up, the warranty has expired.

My system specs are:

OS: Windows 7 64 bit
CPU: Pentium Q8200
RAM: 4 Gigs

Screenshots of artifacts can be viewed here:

http://www.hairminator.com/CANISMAJOR/artifacts/1.png
http://www.hairminator.com/CANISMAJOR/artifacts/2.png
http://www.hairminator.com/CANISMAJOR/artifacts/3.png

Thank you for your time, and any help!
a c 189 U Graphics card
October 5, 2010 4:04:55 PM

You can try older driver like 10.3 or 10.4, see if that helps you, that's the most stable driver for today, sometime the latest driver is not the best solution...
October 5, 2010 4:31:55 PM

I have now tried both 10.3 and 10.4, and neither solved the problem sadly.

Thanks for the input though!
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a c 189 U Graphics card
October 6, 2010 1:20:51 AM

Try re-seat the card? Or try your card in different PC?
Well, if the same problem appears then i guess your card is going bad, sorry...
October 6, 2010 6:45:42 AM

try changing the clocks a bit up and down, even lower clocks cause artifacts on my 5670, maybe with you too.
Most probably the VRAM is overheating, get VRAM heatsinks if possible
!