hey Guys i know you guys are smarter than me so maybe you guys can me some knowledge of what is going on with my system. I just brought 2 Diamond HD 4850 video cards, installed it on my pc, but crossfire mode is not showing up. The ATI CCC does not have have any crossfire tab for me to enable it. In device manager it shows i have both card up and running but somewhere no crossfire for me to choose from. Should i flash the bio or what should i do? thank you knowledge people!!