AMD today formally introduced Catalyst 11.1 WHQL software suite and Catalyst 11.1a Hotfix update. AMD Catalyst installs drivers and system software for ATI/AMD Radeon graphics processors (HD 2000 series and above), AMD chipset integrated graphics, and other ATI multimedia products. The Catalyst 11.1 WHQL finalizes the new Catalyst Control Center (referred to so far as CCC2), as the default control center, which simplifies control for mainstream and advanced users. It also formally introduces support for OpenGL 4.1. Catalyst 11.1 WHQL adds performance updates to F1 2010 and Left 4 Dead 2, the performance increments are more for the HD 6000 series GPUs. Next up is the 11.1a Hotfix update, which packs all the features of 11.1, plus performance improvements for Radeon HD 6000 series GPUs. It also adds new tessellation level controls. A number of Catalyst AI texture filtering updates are also added.