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rtangwai's Avatar

11.22.2012 , 12:15 AM | #10
Isn't a HD6990M a Crossfire GPU? There are issues with Crossfire/SLI, try playing in fullscreen windowed mode. I have Crossfire (quadfire in fact) HD6950's and I get much better and smoother performance (with the loss of AA and other features) in fullscreen windowed mode (which uses only 1 GPU) on 3x30" monitors.