Just learned that most HDMI cables over 15 feet don't actually support 4K HDR properly

I was swapping out a projector in a conference room last Tuesday and couldn't get a stable signal past 12 feet. Checked the specs on a few 25-foot cables I had and turns out they max out at 18Gbps, not the 48Gbps needed for full 4K HDR. Has anyone else run into this issue with long runs or found a solid workaround besides active cables?

4 comments

4 Comments

emery2901mo ago

Yeah, shane_park92 is right, 25 feet is asking a lot from a passive cable. I had to swap out a 20 footer once for a shorter run and just moved the gear closer, worked way better than any of those "boosted" cables I tried.

shane_park922mo ago

25 feet and expecting 48Gbps is pure OPTIMISM my dude.

susansingh2mo ago

Used to think cable length didn't matter, yeah this changed my mind.

davidkim2mo ago

@shane_park92 nailed it, physics always wins with long cables.