HDMI Not Working In 4K with Cable Over 25 Feet

[Aaron Jones]

I have tried three separate cables to connect my Radeon RX580 to a monitor
and none of them work. I need to be able to connect from across my room and
so I have purchased a 20 Foot Cable, a 25 Foot cable, and a 30 Foot cable
with a repeater and none of them will keep a signal at 4K. However, I moved
the 30 foot cable over to the displayport using an adapter and reduced to
1080p and it works.

Any one able to recommend a 4K friendly method for connecting my system at
around 20ish feet?

Thanks,
Aaron
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