I have a PC with a GTX 970 on mini HDMI 2.0 hanging on a LG 55UB850v UHD screen.
Currently running the with a mini HDMI cable 5m deleyCON, also bought on Amazon. That's no problem at all until, yes to you on UHD comes. And ladies and gentlemen, UHD (or 4K) that is 3840 x 2160 at 60 Hz. No 30Hz, 25Hz and 24Hz not ruled out completely.
The 5 meters deleycon makes to 4k @ 60Hz zicken already a lot, for example, random pixels, small glitches or vertical lines in the image. Depending on how you insert the plug into the HDMI socket "bewackelt".
That's why I switched to the Purelink, firstly because of the great reviews, and secondly because I thought that 3 meters are signally better. Long Story Short: I get exactly to 3840 x 2160 at 30 Hz, an image. In the screen remains ever entirely black. Granted, the plugs fit well and the cable also does not make a good impression otherwise, but HDMI 2.0 is the safe. 4k @ 30Hz creating 'I namely even with my DVI to HDMI converter.
And because it is recognized as an EXTRA 18 GBit HDMI 2.0, I have to assign a star. Anyone who is trying to debug a 4k connection with the cable damn badly off. At the cable because I had namely not necessarily intended as the first. So absolutely no buy recommendation from me. I'll send it back and look if I have better luck with a 3m deleyCON.