i Xfired 2 5850's and it runs every game phenomenally.
EXCEPT BF bad company 2. Random crashes to desktop, black screens ( like u guys), black screen flickering.
i dono, it seems there is no concrete fix for it and these problems occur on many different brands of gfx cards.....im thinking game problem -.-
I had the crashing to desktop but found out that this is a driver problem with ATI 10.5 and greater. If you use 10.4 you shouldn't have this problem. However, you still have the black screen and flickering.