Hi @Ginsengelf , welcome back to the NVIDIA dev forums!
The way this should be interpreted is that all the NVIDIA GPU Direct features as part of Magnum IO are supported on current generation datacenter GPUs. If you check the RDMA docs specifically you will find that it was already introduced with Kepler generation and does support Quadro and as such Quadro RTX6000 as well.
Did you find some product description of an RTX6000 that only listed “GPU Direct to Video”? If so I would be very interested to see where you found that so we could clarify this possible confusion.
I hope this helps.