Hope you guys can help here, I'm running a ASUS M2N SLI deluxe MB, 2gb corsair ram, AMD x 2 5600, with dual 8800gts OC 512's. I have a 22" monitor running COD4 at about 91fps, stays right around 91 most the time until something big and then drops to around 60 at the low. My question is that when I put the second card in, everything is the same as only running 1 card. I have a BFG 650w PS. I ordered a 850 to see if that could be the problem. Why is SLI not improving any gaming or FPS here. Any help is welcome. Thanks