Hello,
Wanted to get back to you on what I initially said regarding tiled resources in Nsight Graphics not being supported for DX11. After further discussion internally we determined that we do have support for tiled resources in Nsight Graphics for DX11, however, there is a bug in the feature. I have created a bug for the engineering team to take action on for your issue in a future release.
With regard to the additional questions you asked have you tried this Forum here DirectX, DXR, DirectCompute - NVIDIA Developer Forums? Another possibility is this Driver category here About the Drivers - Linux, Windows, MacOS category.
Regards,
DG-9237