[mdfwrestler]

Not all active cables are equal.

AIUI some (most?) active cables only support HDMI 1.4 modes and below - and don't support the new, higher clock rate, HDMI 2.0 modes that are required for 4:2:2 and 4:4:4 2160/60p. If you are using an Active cable solution you'll need to upgrade to one that supports HDMI 2.0 modes. Active cables are the exception when it comes to cables supporting HDMI 1.4 vs HDMI 2.0. That's because they aren't really cables - they are HDMI sources and sinks.

(HDMI 1.1-1.3 ran with a max clock rate of 165MHz, HDMI 1.4 moved this to 340MHz and HDMI 2.0 now has a max clock rate of 600MHz.)

Cheers noggin, another option to research, only if I successfully replace my HDMI cable to HDMI 2.0 standard I could carry on with my HTPC - or just ditch it for a 4K60Hz receiver + Nvidia box