4k @ 60hz over 15metres help?

[Snookums]

I’m looking at outputting from my pc to a TV. Total span is about 12m so guessing a 15m cable is what I’ll need. It’s displaying to a 4k screen at 60hz but it is only hdmi 2.0 input. Pc output is a 4080 suprim so hdmi 2.1

I just need clarity. Plenty of places say hdmi is good for that distance, others say an active cable is needed.

What solution would you guys suggest for this? Would a DP to hdmi make any difference?

 

[Snookums]

Figure it seemed pretty hit and miss. Thought id move the pc for the meantime as I’m not really using in my office atm anyway.

For some reason a hdmi cable that output at 5120x1440 at 60hz isn’t outputting at 4k@60hz on my tv. Even the 1440p isn’t showing 60hz available only 30hz. I’m not 100% certain it’s a 2.0 cable but surely it must be if it can do 60hz at 5120x1440?