You may want to reconsider not doing 3 way SLI. When you install 3 GPU's You will loose performance because with 2 cards in you get 2 + 16X. = 32 pipelines. With 3 GPU's you will go down to 8-8-8 = 24 pipelines. It really depends on how a bios in a Mobo will allow you to config the slots. Things will be different on all Mobo's Some will let you config maybe 16-8-8. Many Tech Reps I've spoken to say to stay with 2 GPU's for gaming. Only a few games could possibly benifit by 3 way SLI. Extensive Homework on the net will tell you what you need to know & help you decide. As for me, I'll stick with 2 cards.