Come on m8... you think they can predict/test full compatability between all possible makes and models of CPU, Graphics Card, and RAM in all possible combinations?
REALLY?
And did you check to see if there were any driver updates before you wrote it off as a game issue?
And do you know with absolute certainty that it has nothing to do with other background processes running on your computer?
And did you try simply turning down the HDL/Shadows - its not the best Graphics card...