Hello Eric,
Redeon has 2 HDMI out, one will be dedicated for 4K playback from Adobe Premiere & the other port will keep it free.
For user GUI, I used Thunderbolt3 to HDMI converter which working absolutely perfect.
My main concern since I am not a video editor If Redeon will be sufficient & efficient to use it as Video Device in Premiere rather than buying Blackmagic or AJA ?
Do you know any similar setup which totally depends on GPU as a video playback in Adobe ?