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