To answer OP's question, yes you can buy HDMI 2.1 cable up to 100meter
For a passive copper cable, 3 meters is the limit (unless you enjoy black screens or green artifacts on your screen). Anything over 3m should be an active cable.
And yes HDMI cable is backwards compatible so you could use a 5m meter passive copper cable with an older HDMI 2.0 device just fine, but plug in a shiny new RTX3080 and you will get artifacts and black screens
Thanks for the replies, yes it seems 5M is the limit, unless you go optical hdmi 2.1 ?
I wonder if anyone has tried optical hdmi 2.1 from GPU to TV ?
Seems like its my only option short of moving the whole hifi rack.
For a passive copper cable, 3 meters is the limit (unless you enjoy black screens or green artifacts on your screen). Anything over 3m should be an active cable.
And yes HDMI cable is backwards compatible so you could use a 5m meter passive copper cable with an older HDMI 2.0 device just fine, but plug in a shiny new RTX3080 and you will get artifacts and black screens
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