A question for someone that has a Ryzen 7000 and an UHD/4K/HDMI 2.1 display like for example a TV from the last few years:
Can you set the HDMI output settings to 3840x2160, 60 Hz (or more), RGB 0-255, 10 bit per channel colors and HDR enabled?
Couldn’t find a trustworthy answer online, data sheets are sadly meaningless here (previous AM4 APUs also had “HDMI 2.1” but in reality you could only use 3840x2160/60 Hz/8 bpc colors, basically the limits from HDMI 2.0b + VRR).
I know that the iGPU isn’t fast enough for gaming, I’m just interested in a 2D output that handles the specs mentioned above without having to use a dGPU.
Sadly, no. On my LG C2 I can do 4K 120Hz with YCbCr420 on my Ryzen 7000 with an Asus ProArt x670E. On 60Hz it defaulted to YCbCr444, but I’d think it could do RGB as well.
YCbCr420 doesn’t look great for text rendering (colour fringing) but it might be OK for gaming.
By any chance, do you know if the Ryzen 7000 iGPU supports DSC (or @wendell )?
(Then there might be a chance of reaching higher output settings with an active DisplayPort 1.4-to-HDMI-2.1 adapter, in my experience they only work with DP 1.4+DSC, if DSC is missing then they basically fall back to HDMI 2.0b )
According to AMDs press publications they support DSC (for DP they have supported this for while). But DSC with HDMI requires the FRL modes.
I saw one of AMDs press slides, that said, 7000 iGPUs support both FRL & DSC on HDMI (without max speed. Given that even RX6000 seems limited to FRL5 (40G), the iGPUs probably have some limit as well), but FRL might require additional components on the board or even a DP-HDMI converter since a lot of boards say they are limited to the previous 4K60 which I am assuming means no FRL, only TMDS 600 MHz support.
The most I have seen so far is from Asrock Boards, which list FRL (8G) support in their specs. Assuming they are giving us the Lane-Rate as is common with DP, that would be FRL 4 with 32G in total.
Lane-Rate is the only one that fits exactly. Alternatively that would have to mean FRL1 with 9G raw, 7.88G after encoding overhead.
But would be great to know if this is something native, possibly requiring redrivers on the board or just an adapter chip with arbitrary limits, similar to how Intel is providing FRL on their ARC GPUs.
Edit:
ok, while trying to find my source again (https://videocardz.com/newz/amd-confirms-ryzen-7000-integrated-rdna2-graphics-features) I might have imagined somebody explicitly mentioning DSC with HDMI. But I believe it should be possible to reuse the already existing HW used with DP so I could not imagine why not, if it is in fact native output. If not native, then this would be up to whatever converter is used. Anybody know how the HDMI-DSC support is with the already available DP-HDMI FRL adapters? Can they recompress the already compressed signal from DP? Will they just forward the exact signal they get via DP without changing the compression or will they always uncompress?
Edit2: iGPU Benchmarks and AM5 Motherboards, Ryzen 9 7950X and Ryzen 5 7600X - AMD Ryzen 9 7950X and Ryzen 5 7600X Review: A Return to Gaming Dominance | Tom's Hardware states FRL6 (48G) & DSC without any indication of sources. And I find the 48G very hard to believe, as existing RDNA2 did not support the full speed. Also 40G would use the same frequencies as DP UHBR10, so probably much easier to only supprt HDMI with the same top-speed as DP. Especially with the fine-grained speed levels available with FRL, why would you implement 48G on this tiny iGPU, there is probably no practical use that could actually saturate that with this iGPU.
Guess I’ll have to check the eventual Ryzen 7000 DisplayPort adapter capability myself when the 3D SKUs hopefully hit the market January 23rd (fingers crossed).
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