Don't mine in crossfire. Configure guiminer to use each card separate.
I cant do that because I cant even see the GUIminer window. Also this is my main computer that I also play games on so I'd prefer to mine in crossfire. I'm on 11.8 drivers right now so I don't think I can update them anymore
Edit: just grabbed the newest SDK, no change. do i have to restart after i install it?