Originally Posted by golffnutt
Thanks Craig for that detailed reply. Because of the way my family room is laid out I can not run 4k60 RGB 444 through the wall. I do have 444 turned off on the Oppo and still I can only get 24hz 8 bits. Maybe I need to return my Luxe 35' cable for the 35' Cabernet cables? Also need to return the 6' Ultra Slim Active cables for the Monoprice CP cables right? Will these 2 things help you think? What is YUV420? I am not educated enough on all this stuff to know that unfortunately.
Yes, for devices that output RGB 444 (Samsung 4K Bluray player, PS4 Pro) I use 3ft CP cables that I bought to replace 4ft Ultraslim cables. The Ultraslim cables sort of worked but I was getting occasional white flashes. For the Wii U, PS3, Oppo BDP-83 and the X1 I use Ultraslim cables, as those boxes only output 1080p.
YUV420 basically means the color information is displayed at half resolution vertically and horizontally compared to the luminance information. The relevance to cabling is that it reduces the number of pixels that need to be transmitted and as such reduces the required bandwidth. Bluray disks also use this format to reduce the size of the movies on disk.
The relative bandwidth required is proportional to the number of pixels sent. YUV420 = 4 + 2 + 0 = 6 therefore requires half the bandwidth of RGB 444 = 4 + 4 + 4 = 12. HDR requires 10 bits per pixel so requires 10/8 more bandwidth than SDR or regular 8 bit video. The respective bandwidths at 4K60 are shown here.
2160p60 YUV420 8.91Gb/s
2160p60 YUV420 HDR 11.1Gb/s
2160p60 RGB444 17.8Gb/s
If a newer cable like the Luxe couldn't do 11.1Gb/s I'd return it, it should be able to. Very, very few cables can do 17.8Gb/s even though they all claim to be able to and the longer you need the fewer choices there are. Monoprice Certified Premium are good up to 20ft and they're by far the cheapest out there. Stay away from the premium priced brands (Monster, Audioquest etc. as they are mostly rubbish).
If you really need 35ft I'd definitely try the Cabernet cables as they are relatively inexpensive and I have two running through my walls that pass 11.1Gb/s no problems. They definitely won't work at 17.8Gb/s so I'm using an additional 25ft Belden Series-1 for the main feed from the receiver.
Someone else posted that they were trying to get a 35ft run to pass RGB 444 and the Belden Series-1 did the trick. That's your last resort because the cable is going to cost you over $100 and it is truly a massive cable.