After trying many different HDMI cables including a top of the line cable with Redmere, I still had handshake issues with my TV

works great, copper hdmi cables don't process 4kK content very well

A best long hdmi cable I have bought especially bandwidth can pass 18Gbps and work 4K at 60Hz with HDR perfectly

I highly recommend this hdmi cable if you are running a more than 40' distance between the source and the display and you are sending a 4K60FPS HDR 8 or 10 gbps signal

An HDMI cable over 15' that actually works at 4K 4:4:4, thank you.

With the higher resolution of 4K and the additional data required by HDR, even top quality long HDMI cables have become spotty in their performance.