It seems it supports DP 1.4 as well, so perhaps you could get an adapter if your display only supports HDMI 2.1

I'm not sure that would work. From what I can tell, the adapters are basically dumb straight through cables, they aren't converting anything. And it's the actual GPU that's outputting a HDMI signal over the Displayport connector, which the adapter than rewires in to a HDMI shaped connector.

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cesarb 8 hours ago | parent | next [-]

> And it's the actual GPU that's outputting a HDMI signal over the Displayport connector, which the adapter than rewires in to a HDMI shaped connector.

There are two kinds of DP to HDMI adapters. The passive ones are like you said, they need special support on the GPU (these ports are usually labelled as DP++), IIRC they only do some voltage level shifting. The active ones work on any DP port (they don't need AFAIK any special support on the GPU), and they do the full protocol conversion.

	▲	baq 2 hours ago \| parent [-]
		Caveat: the good active ones aren’t exactly cheap.

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OGWhales 8 hours ago | parent | prev [-]

I was able to use this adapter to get my 2070s DisplayPort output to send 4k120hz to my TV, which only has HDMI ports.

Club 3D active adapter: https://www.amazon.com/Club-3D-DisplayPort1-4-Adapter-CAC-10...