Im running vista 64bit buisness edition and I got 2x 3850 in crossfire mode. I know its enabled, fps and all the other goodies prove it. When I load any of the gpu-z's it still shows it as disabled. Is this a bug? they worked fine in windows xp 32bit, just not in vista 64bit. Funny thing is I couldnt get crossfire to work in xp but gpu-z said it was enabled.