ATI continually improved their driver by releasing hotfix and improved gameplay experience for Far Cry 2 and Stalker Clear Sky.
The Hotfix particularly address the following issues:
- Improves performance for the DirectX 9 version of Far Cry 2 on CrossFire
- Improves performance for the DirectX 10 version of Far Cry 2 on both single and CrossFire
- Improves performance for the DirectX 10 and DirectX 10.1 version of Stalker Clear Sky on both single and CrossFireX configurations at higher resolutions
DirectX 10.1 is currently only supported by ATI cards based on 3000 and 4000 series model while Nvidia will only support it next year on their future cards.
You may download the new driver and hotfix at AMD/ATI Download Center