Got it figured out. Needed:
1) High quality MDP - HDMI cable specifically labelled "4K"
2) Got into AMD firepro management app and changed monitor to custom display. The key inputs were 3840, 1620, CVT, and 24K hertz.
3) Changed TV input type to "PC" using the down arrow on select source.
Now it's awesome! A little slow for video, but that's what you get for the price.