AMD has released their Catalyst 13.3 beta driver which improves performance for Sim City, Far Cry 3, and latency issues in Tomb Raider and Hitman Absolution. It also fixes some Tomb Raider TressFX issues.
Improve performance in Sim City 5 up to 16 percent
Improves performance in Far Cry 3 up to 5 percent
Improves latency performance issues seen in Tomb Raider and Hitman Absolution
Resolves slight corruption seen in Tomb Raider with TressFX enabled for CrossFire and single GPU configurations