All our server hardware comes with non-NVidia graphics cards. Combining non-NVidia graphics card with S1070 does not work in Vista and Windows Server 2008 because loading of multiple VDDM drivers is not supported.
Windows 7 and Windows Server 2008 R2 do allow loading of multiple WDDM drivers, so this problem should not exist anymore in theory. I can see that the drivers for both non-NVidia graphics card and C1060 get loaded successfully, but the CUDA still does not work. I am using Windows Server 2008 R2 Beta and v181.71 NVIDIA graphics drivers.
Setting DisplaylessPolicy and LimitVideoPresentSources registry keys suggested in other posts did not make any difference.
Any suggestions on how to make non-NVidia graphics card work with S1070 in Windows Server 2008 R2, like it used to in Windows Server 2003?