...but mainly doesn't. I am new to dual gpu and haven't had a ton of time to troubleshoot this yet but I thought I'd post what is wrong and my findings so far in case someone has insight. Under XP 32 and 9.2 using RT 2.23 to monitor GPU load the other night I noticed the second card was flat-lined. Think I was playing FO3 and also tried Oblivion and Crysis-no go. A reboot didn't help, nor did testing forcing a profile with AgentGODs tool. So I downloaded 8.12 and Driver Cleaner'd them in, rebooted and lo and behold both GPUs worked again in Oblivion with near perfect sync. Tried FO3 again and nothing even after a reboot. And again Oblivion and Crysis wouldn't use second card either. Cold boot didn't help. So went back to 9.2 last night even trying the 'install one card at a time' method. Worked fine right at first once again but then nothing after restarting the game and never got it going again after another hour of screwing around and trying everything I could think of including different bridge configs. I have Vista 64 install I can try out which I will do though really just use it for a couple DX10 games.