I have an ASUS A8N-SLI with two 6600s. They are running Windows XP Pro and have all the latest drivers and software updates installed. The problem is that I can't get 4 monitors to work. The system is NOT setup as a SLI machine, just two seperate video cards. I can get two monitors to work on one card, but only VGA and TV out. I have also tried using two 6800GS to see if that would work, but it does not. Is this problem just me or is it a limitation of the nVidia nForce4 SLI chipset w/ 6x00 video cards?