Catalyst 7.4 Drivers Released
 

OpenGL performance in Windows Vista improves for the entire ATI Radeon X1000 series of products in both single card and hardware Crossfire configurations. Typical Improvements of 15% or more can be seen games such as Doom 3, Quake 4 and Prey with enthusiast class products seeing improvements of 30% any beyond.

http://ati.amd.com/support/drivers/xp/radeonx-xp.html