I have two 6950's running in CrossfireX, tried these cards with two brides and one bridge. I have them in a Asus CH4E board, 8 gigs of RAM, 1200w PSU, 120mm fan installed in the card fan bracket of my Cooler Master 932 Advanced case. Asus instructions say for CrossfireX slots 1 & 3 are to be used. All my drivers are updated for everything I got in this case, OS has everything.
Then I tried only a single card. Card #1 went into slots 1 & 3, both installs worked flawlessly, then card #2 also were installed into slots 1 & 3, again both installs worked flawlessly. As a single card, both cards work great!
Now I went back to Crossfire. I tried three different bridges, all in the two locations where they attached to. I also flip flopped both cards several times with all three bridges. Using them in all configurations possible, problem still remains. BFBC2 will run great for a few minutes, then the flickering or flashing will start. Its never constant either, very sporadic. Now I am thinking this is a driver issue, anybody got any ideas? Thanks!