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I had a similar problem with eve online. All i done to fix it was turn cat a.i. in the ati cp to advanced and all seemed good after that. Not sure why this worked but it did. This was on a 3870 but the architecture is pretty much the same so it may work for you.

Did installing new drivers help? What is your anti aliasing settings set to?

No it didnt, and my setings are set 8x and i also tried on 2x same result![]()
yeah good point get a nvidia instead![]()
yeah good point get a nvidia instead![]()