After the WHQL version, AMD release a hotfix for ATI Catalyst 9.12. This hotfix provides full support for GPU acceleration of OpenCL when used in conjunction with the ATI Stream SDK v2.0. This support of OpenCL is limited to Radeon HD 5970 Series, Radeon HD 5800 Series, Radeon HD 5700 Series, ATI Radeon HD 4000 Series and FireStream 9200 Series.
The hotfix also resolves some problems like mouse being enlarged under Windows7, performance of OpenGL games, or CrossFireX support for Eyefinity.
You can grab the 9.12 hotfix HERE.
I don’t know what AMD has done with this driver but the installation takes hours… Fortunately AMD has published this hotfix, because it’s the only way for me to have the 9.12 + HD 5870 + Vista. The 9.12 WHQL can’t detect my HD 5970. Tough life…