Highlights of the Catalyst 7.5 release include:
Performance improvements
• OpenGL performance in Windows Vista improves on the Radeon X1950 XTX at high resolutions (1920x1200 or greater) with anti-aliasing and anisotropic filtering enabled. Doom 3 and Quake 4 impr...
http://www.amdplanet.it/tag/ati/news/19 ... st-75.html