My suspects would be: antivirus, some software autoupdate, hdd access by game, game is flashing vram (too high textures)... ...or you are using vsynk without triple buffering.
upd. Just noticed 5970 is a dual chip video card. This can be the reason for all the trouble if crossfire is not working correctly somehow in fullscreen or in general. And 1gb vram per chip is not enough to run everything maxed out as you easily get your vram filled with high-res textures.
Last edited by Ataros; 05-21-2011 at 01:08 PM.
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05-21-2011, 12:48 PM
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