I have 2 major problems with a newly purchased RX6900XT GPU that never occurred on GTX 1070Ti and RTX 3080 I was using.
This is connected to a LG OLED C9 TV.
First issue:
The GPU is limited to 4k/120hz 10bit 4:4:4 RGB or 4k/60hz 12bit 4:4:4 RGB in windows but not 4k/120hz 12bit 4:4:4 RGB.
RTX 3080 is outputting 4k/120hz 12bit 4:4:4 RGB just fine.
This seems to be a 40Gbps cap on AMD's HDMI 2.1 implementation that was never mentioned and I have no idea whether this is a hardware limitation or it can be fixed with a driver update to give us full 48Gbps HDMI 2.1 bandwidth as it supposed to be,
Second issue:
4K HDR videos do not run in 12bit or 10bit YCbCr 4:2:2 format and the only option is 10bit YCbCr 4:2:0 and that is not good.
Again, both GTX 1070Ti and RTX 3080 support 12bit YCbCr 4:2:2 just fine.
I need to know whether these 2 issues can be fixed or not before losing the ability to return my RX6900XT.
Thanks.
