I Think I might be having problems with crossfire still. My 2x HD 7850s are running with a i7 3770 and are getting a 3dmark11 score of about 9500. However people with i5s that haven't overclocked according to 3D mark are beating my score by over 3000? Is there a reson? Faulty graphics cards or something? Or am I just being an idiot? 
