General > General Technical Chat

Does the length of HDMI 2.1 cable matter?

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eeguy:
How come Startech's cables are more expensive than most other brands?

Kjelt:
Indeed for that short length passive cables would suffice but if you really intend to use for 4K/50 and higher the cable and pair shielding becomes really important.

Be aware for manufacturers or sellers selling HDMI2.1 or 4KHDR cables etc., they do not use the proper terminology since HDMI2.1 also has all the backward compatible formats like 1080p25 in it.
So by itself this says nothing.

Check if the proper terms are used ON the cable itself which should be: Category 3 HDMI or "Ultra High Speed" HDMI cable.

wraper:

--- Quote from: eeguy on June 14, 2022, 12:40:25 pm ---How come Startech's cables are more expensive than most other brands?

--- End quote ---
They have quite fancy connector construction and you pay for it being Startech. BTW by adapter which you purchased you mean something from these? https://www.cablematters.com/c-141-adapters.aspx. The vast majority of them look like pure Chinesium sold on Aliexpress for less than $2 with delivery from China included. Usually they are total trash with no regards to signal integrity whatsoever.

eeguy:
So they are like the Apple in the cable industry?  I tried their DisplayPort 1.4 to HDMI 2.1 adapter but there are issues with fuzzy text. I also tried Club3D's adapter and cable but the display could not even detect the PC. Know any good DisplayPort 1.4 to HDMI 2.1 adapter that can do 4K@120/144Hz with chroma 444?

tszaboo:
Yes absolutely, cable quality and length matters at those speeds. Eye diagram will look bad, and you will get disconnections of dropped frames or other digital weirdness.
Linus tech tips had a HDMI cable tester not that long ago, and they tested a bunch of cables, check out their video about it. If you can find it since they are named clickbait recently.

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