and the answer to your question is Yes some have Open CL support,this one dose:
Do you know what is so specional in MSI card, why only MSI HD5770 support OpenGL?
And i install drvers ATI Stream SDK v2.1 with support of OpenCL (yes my card support OpenCL) and now when i run 3DMark Vantage i got a error. Test will start and go, but on finish appar some error about PhisiX...
Do you know why?