Heres the problem! when running those 2 with the 8800 as primary the computer loads upto the windows xp symbol and the scrolling blue bar and then the bar just stops moving. However if i run with the 6600 as primary the the computer boots fine. Obviously i want the 8800 as primary for the better graphics but im unsure how to do this. I was wondering if its because the 8800 is trying SLI but i can't figure out how to turn it off if it is possible. Anyone got any idea on why this won't work or how to turn off sli?