HDMI 2.1 FRL and DisplayPort 2.1 UHBR video sources for gaming, home theatre PC and viewing experience
Adoption of HDMI 2.1 (FRL) and DP 2.1 (UHBR) in video sources and displays – features, port speeds, interfaces, marketing and challenges in transitioning to new connectivity tech in products
Why use HDMI 2.1 and DP 2.1 ports on video sources? ——–
There are several reasons that have been pushing image sources towards wider video data bandwidth and full adoption with uncompressed video signals. Those mostly include:
gaming experience – 4K 60/90/120Hz 10-bit RGB images require >18 Gbps and FRL signal
daily viewing experience of images as above, such as smooth scrolling, require FRL signal
live videos 4K/60 10-bit RGB require FRL and more bandwidth than HDMI 2.0b can offer
pass-through devices, e.g. capture cards, for the above signals from GPUs/consoles, need FRL
new AMD 7000 GPUs will drive even higher resolutions on DisplayPort 2.1 up to 54 Gbps
AMD Zen4 CPUs and Zen3+ APUs are capable of supporting both new specifications
HDMI 2.1 (FRL) – Ports on some products are already fully capable. Nvidia RTX 3000 and 4000 GPUs can output 48 Gbps video signal on HDMI. Nvidia GPUs can output up to 4K/144Hz 10-bit RGB or 4K/120 12-bit RGB signal onto capable display without DSC (image compression codec by VESA) and up to 4K/240Hz with DSC. Similar capability is linked to AMD 7000 GPUs.
ADDITIONAL CHIPS ON BOARDS
High density video signal needs to maintain strength and integrity in order to be delivered from source processor chip to output HDMI or DP port. PC motherboards and PCB boards on graphics cards use several types of chips to achieve this. Specifications of those chips can reveal whether end product supports HDMI 2.1 FRL and/or DP 2.1 UHBR signals.
Please note that additional chips do not guarantee support of all video modes. Those chips indicate hardware capability. Appropriate combinations of resolutions, refresh rates, bit depth and colour space profiles must be supported in EDID, DisplayID and driver level too.
原文：https://www.avsforum.com/threads/hdmi-2-1-frl-and-displayport-2-1-uhbr-video-sources-for-gaming-home-theatre-pc-and-viewing-experience.3259197/