I have a similar problem, hope someone can help, I have one card 2070 GTX and it shows in system devices but not working, i tried the above command line 1 and line 3 and started the VM and i was able to see my windows and the graphic card was recognized, when I rebooted the unraid server it went back as before ? anyone has a clue what is the cause of this. knowing that I setup the same before and it worked but it was a test run so had to reformat everything and do it all over, and I am following