I think my mainly problem was that I didnt uninstall old drivers for my old card (nvidia 8600gt). So I put that Nvidia card back to PC and uninstall everything from Nvidia. Then I also uninstall every drivers from AMD and then I removed old card. So in PC wasnt any graphic drivers and any cards. In this condition I put there new MSI card and instal new drivers for AMD 6870.
I think that you have to use the last drivers from amd. I am not sure, but drivers from MSI dvd (that comes in package with card) are not up to date and do not work with vegas. Also you need OpenCL version 11.7 or newer.
But I still cant get GPU acceleration for Sony AVC codec… 🙁
And Mainconcept codec with can use GPU acceleration is allways rendered with that green bug… 🙁
WHY??? It must work if Sony tested their new product with exactly this card…
(I hope you understand my terrible english, sorry for that)
Dominik Jursa