Quote from: pinjas on July 06, 2011, 09:29:30 AM

It seems ati tray tools can only support 2 cards, msi afterburner can do 3. However, I think you may be able to get around this problem by connecting the two with a crossfire bridge. I read that being suggested some where, I haven't tried it myself. I just took one of the cards out and put it in another machine. Linux can do 4 cards, but I can't seem to get around 'Configurable Peak Range'.
I also read that crossfire might slow it down a little. I had a few cards in crossfire not long ago, I am not sure if they really mined any slower.

It can handle more that 3 cards just fine. The problem is when you mix cards (at least for me). MSI was handling 4 6990s just fine.