I would have to mention; you may want to reconsidder those cards, look for a better card without going sli, as many times, the sli cards take a chunk out of your performance compared to a good single card. Hence my sig pic, "NEED MORE CPU" I'm thinking 3.6-3.9 GHZ would be needed to push the cards, but I could see a good single card putting out better numbers than sli.