The currently available expansion cards support up to HDMI 2.0b, with 4K 60Hz resolution.
Since the processor should be able to generate more data than that (as proved by the availability of DisplayPort expansion cards), is an HDMI 2.1 expansion card on the horizon?
Since it is not mentioned on the web site, is the current DisplayPort expansion card able to support 4K at 144Hz? Which version of DP is it?