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Comment by OGWhales | Hacker News Reader

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.

> 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.

Caveat: the good active ones aren’t exactly cheap.

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...

It will, I’m doing DP to HDMI 4:4:4 4K@120Hz (and expecting HDR in the near future) from an RX 7900XTX to an LG C3 on Linux.

I’m using the Club3D active adapter, which is the only one I found in reviews to reliably work. And it does, 0 problems whatsoever.

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