Try running grand theft auto. Crossfire gives you maximum 800x600. If you disable crossfire it works but there is massive artifacts, missing textures (heads for example! only teeth show). This is on a 2x5960 system. Tried it with xfire and non-xfire. I went back to 10.4 and GTA works flawlessly. Can someone else confirm? It seems that once it starts messing up, then it gets worse. If you go into the menu and change something in the graphics section then it improves for a short while and then goes right back. I am using the cards at stock speeds.