I have an ATI Radeon HD 5870 card and am trying to run d3d11 (feb 2010 sdk) on it, but it seems to revert to direct3d as a 10.1 feature set only (in the samples as well, not only my code). I was truly disappointed at first since the only reason I bought the card was to develop d3d11-stuff with a non-reference driver. But then I started to search around the web and everywhere it says the 5870 should support dx11. But why doesn't it? Is it the driver that is not fully functional yet? I just installed the latest catalyst 10.2 (including drivers).