Thats odd because it works fine with my 3 cards. Turn crossfire off then back on and restart your pc. What drivers are you using? Go get 11.2 and the ati catalyst application profiles 11.2 cap3. http://sites.amd.com/us/game/downloa...n_win7-64.aspx
O and make sure you have msi afterburner 2.1.0
No more over heating problem! Except It still using my HIS card - so eventhough now the screen is plugged into XFX the GPU usage is still 0% on a fullscreen 3d application!