If you're sure your psu is good enough and card is ok, and not overheating, and you've tried updating your chipset drivers, and mobo bios if there are new versions available (Those often go under the, if it isn't broke don't fix it category since you can end up with a unbootable system if you do it wrong or power is interrupted during the flash process or endup in a blue screen loop if you force install wrong chipset drivers.)
Try downclocking your ati card and see if the glitch goes away.
If you are overclocking your system, return it to default clockspeeds and seetings that goes for gpu too of course, even if it seems stable in one game doesn't mean it will be stable in another game.
As some users has reported the fan on their ATI card never changes from 30% even when its overheating try raising it to a higher idle speed.
ATI Radeon HD 4850 Fan Speed Workaround
http://www.techpower...index.php?64398I don't know how you install/update your graphics drivers when you do. But sometimes reinstalling the drivers can fix issues.
So uninstall drivers, reboot into safe mode.
Run a program like driver sweeper to remove left over files and registry entries, or do it manually.
http://downloads.gur...nload-1655.htmlhttp://www.tweakguid...m/ATICAT_3.htmlOther than that I guess you'll just have to wait for a driver update from ati. I don't think theres much you can do on your end unless we are overlooking something. It does look like a driver glitch to be honest.
You can try to rename the games exe to UT3.exe to get catalyst to load the profile for Unreal 3 and see if glitch goes away in me2, perhaps it loads some settings/tweaks/hotfix pertaining to the unreal 3 engine which you can't change normally.
Could be related.
http://www.tweakguides.com/UT3_7.htmlDisableATITextureFilterOptimizationChecks=True
This setting appears to be an ATI-specific troubleshooting option, and should only be set to False if you are having issues.
Modifié par Herethos, 30 janvier 2010 - 12:12 .