This is my 4930k @4.0 on it's own
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If I run it at the same time as the 290Xs it only adds about an extra 70 points to the score the cards get on their own. I think most of it's processing power is used driving the GPUs and so there is little left over to add to the score.
Just for funnies, Phenom II x6 1090T @ 4Ghz
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