According to Microsoft Direct3D 11 1 has to be complete in order to execute Direct3D 11 1 feature level I ve only edited it once but Nvidia does not support Direct3D 11 1 or 11 2 fully Microsoft says it has to support all of the features and Nvidia is lying about it Someone has edited it back and I am on an edit restriction on not to revert it so I went to the talk page Nice to see someone edited back the OpenCL 1 1 as Nvidia does not support OpenCL 1 2 but Nvidia does not fully support Direct3D 11 1 feature level talk