AMD Catalyst 12.1a Preview driver includes all of the features found in AMD Catalyst 12.1 Preview.

Additional changes for upcoming update of Rage

• Resolves some new texture corruption issues introduced by the latest version of the game
• Improved performance ~5%
• Smoother game play and reduces multicore sync points
• Fixed mapbuffer failures when switching maps on 32-bit systems.
• Fixed a game crash when switching maps back and forth on 32 and 64bit systems