On June 24 AMD newly launched Radeon R9 Fury X will be on store shelves, the first GPU based on Fiji GPU Core with accompanying HBM memory. Although this new Graphics card is for UHD resolution but will not offer support for the HDMI 2.0 port, continue using the Standard HDMI 1.4a.
AMD Radeon R9 Fury is not equipped with HDMI 2.0
The difference between the two standards means that on 4K resolution HDMI 1.4a only allows a refresh rate of 30 Hz Versus 60Hz HDMI 2.0, perhaps a bit smart move by the company thinking in your Project Quantum, but of course, who is going to connect a computer with a Dual Fiji GPU to a TV to play, as any gaming monitors have DP 1.2a.
Obviously the company is committed to the DisplayPort 1.2a connectivity for high resolutions, as well as supporting 4K at 60 Hz remember that technology FreeSync AMD is only possible through such connectivity. Even during E3 2015 they used 3 4k monitors (12K) to run DiRT Rally game at 60 frames per second.
On AMD’s forum someone asked about such connectivity, and the answer was the same as already we expressed above.
This question was answered by AMD Matt from our forums:
Q: Does the AMD Radeon R9 Fury X GPU have HDMI 2.0?
A: No. AMD recommends and uses DisplayPort 1.2a for 4K60 content.