HDMI or DisplayPort cable — which should a project specify?

Choose by device ecosystem and topology, not by which one is "better".

Answer: choose by what the devices actually are and how many screens you need — the two standards are not ranked, they are aimed at different ecosystems.

ScenarioUsually
TV, projector, AV receiver, set-top boxHDMI
PC monitor, multi-display, daisy chainDisplayPort
Long run to a displayEither, via AOC/fibre
Laptop docking to one 4K screenUSB-C DP Alt Mode

A converter at either end adds a failure point and is capped by the weaker side — specify the native standard where possible.

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Frequently asked questions

Should I choose HDMI or DisplayPort?

By device ecosystem: HDMI for TV/AV gear, DisplayPort for PC monitors and multi-display; avoid unnecessary converters.