Today Ati posted a new hot fix driver for Catalyst 8.10 on their support page.You can find the download links for both XP and Vista + the realease notes here:AMD Customer Care
Ati release note said:This hotfix
* Improves performance for the DirectX 9 version of Far Cry 2 on CrossFire™ compatible systems
* Improves performance for the DirectX 10 version of Far Cry 2 on both single and CrossFire™ compatible systems
*
Improves performance for the DirectX 10 and DirectX 10.1 version of Stalker Clear Sky on both single and CrossFireX configurations at higher resolutions