[Ailos]

The last patch has solved many of the crossfire performance issues, in my experience. If you're having issues with skipping frames, try creating your own profile in catalyst control center with the following settings:

Filtering: program controlled
AA: Program controlled
V-Sync: always on
CrossFire mode: AFR-friendly

I've found that this combination on my pair of 5770s allows me to play the game on pretty much max settings. I've been using this for the last month with quite a bit of success, and as of the last patch, even the microstuttering has disappeared to the point that I really can't notice it. Just make sure you're running 12.10 Release and not the 12.11 beta driver package - the driver will crash A LOT if you don't use a release version.