gpudirect - tesla or quadro - Is there an actual list of supported products somwhere?

see: “https://en.wikipedia.org/wiki/CUDA

I have a question about what gpus support gpudirect.
Also see: “https://devtalk.nvidia.com/default/topic/734807/gpudirect-rdma-supported-quadro-cards-/

The docs just say “tesla or quadro”, but there is a microarchitecture kepler and a brand quadro, but not a microarchitecture quadro.
Does that then indicate anything branded tesla or quadro of any gpu that supports cuda?

Is there an actual official list available somewhere?
Is there a way to poll the GPU to determine if the feature is supported?

I have a set of quadro K600s that don’t seem to support it, yet they are quadros.

see “https://developer.nvidia.com/gpudirectforvideo” - that seems to list of supported gpus, but it is a much smaller list than “tesla or quadro”.

Thanks