Says 60hz on the site, tried HDMI1, HDMI2, FreeSync, tried various HDMI cables, even bought an HDMI to Thunderbolt cable to try instead of HDMI out of the mac.
My old mac mini can drive my 60" TV properly, but my Mac pro can't drive an UHD display? Seems like I should be able to do this....
This is the only resolution I can get 60hz at:
EDIT Answer marked below. For anyone wondering: