As was hinted in a few videos floating on youtube, after the Computex show, Codemasters has AMD's support for DX11 and they should be using the Evergreen family for testing.
http://www.brightsideofnews.com/new...directx-11-dirt-22c-grid-22c-and-f1-2010.aspx
http://www.brightsideofnews.com/new...directx-11-dirt-22c-grid-22c-and-f1-2010.aspx