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MacKeeper

 
Member Since: Apr 16, 2010
Location: Kyiv,Ukraine
Posts: 58
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like bobtomay said this resembles somthing usually called video artifacts, signs of either of the following:
-video adapter driver failing
-video card overheating

Just to make sure, try to reinstall the latest video drivers and get an app to check board temperatures, look for GPU temp.
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