AMD released a new 11.11a Catalyst performance driver.

AMD Catalyst 11.11a performance driver features:

Batman Arkham City

• Improves DirectX 11 performance for single GPU and CrossFireX configurations

Rage

• Delivers AMD CrossfireX performance scaling
• Resolves a number of image / stability issues seen with the title:
• Fix geometry corruption, sometimes seen in Bash TV entrance
• Fix issues with Low-memory conditions on 32bit systems.
• Fix issue with extreme corruption with missing textures on 32bit systems.
• Fix memory leaks when deleting/reusing sync objects.
• Fix hitching and pausing, especially noticeable on some Quad Core systems when doing races and Stanley Express runs.
• Fix some missing shadows

Elder Scrolls Skyrim

• Improves performance 2-7% on single GPU configurations
• Resolve corruption seen when enabling Multi-Sample Anti-Aliasing on the AMD Radeon HD 6970 Series
• Disables CrossFireX (to resolve negative scaling and image quality issues seen when CrossFireX is enabled)
• AMD is continuing to work on a CrossFireX solution for Skyrim