Ryzen 7000 CPU iGPUs now able to output full HDMI 2.1 (2160p/120Hz/12 bpc colors/HDR/Full-Range RGB) via motherboard?

[aBav.Normie-Pleb]

Hi,

this is basically an updated thread from almost two years ago where I got an explicitly negative response to me asking about this:

Ryzen 7000 iGPU + HDMI 2.1: UHD/60 Hz/10 bpc colors/HDR possible?

Hi, 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 AP…

A copy of the core information:

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.

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I just tested this myself and am now feeling stupid for not examining it earlier myself, I can get a full 48 Gbit HDMI 2.1 signal from the iGPU of a 7800X3D on an ASUS ProArt X670E-CREATOR WIFI (BIOS 2007), connected to an LG G3 TV with an active optical 20 m FIBBR HDMI 2.1 cable:

• It functions absolutely stable for hours, but of course haven’t had the actual time for real long-time testing, yet

BUT I’ve encountered 1 issue I can’t explain:

• I get a video signal from the moment of POST until the little Windows logo booting sequence.

• The moment it switches to the actual Windows desktop environment the signal is lost (It doesn’t matter what resolution has been selected, even something like 1920x1080/60 Hz doesn’t work).

• This can be temporarily fixed by unplugging the HDMI cable and then plugging it back in, you then get the expected Windows login screen.

• It doesn’t matter if it is a cold boot or reboot.

• This issue DOES not appear when you send the system to S3 sleep (suspend-to-RAM) and then wake the system up again.

Does anyone have an explanation for that remaining issue? I don’t want to kill my HDMI ports with unnecessary plugging cycles.

Due to the physical distance between the TV and the computer I am currently unfortunately unable to test other 48 Gbit/s-capable HDMI cables.

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And can other users of Ryzen 7000 CPUs confirm HDMI 2.1 (now?) actually fully working with their iGPUs (= UHD with 10 bpc colors at at least 60 Hz refresh rate)? ( @wendell )?

Thanks for your input!

[Janos]

If I remember correctly it was only a problem with the Linux drivers, with Windows my LG shows YCBCR444 10b 4L10@120HZ, but with Linux I get only YCBCR420 8b TM

[FurryJackman]

That’s because HDMI Licensing forbid the open sourcing of FRL link code. Your only option is DP 1.4 to HDMI converters.

[aBav.Normie-Pleb]

I am aware of the Linux licensing issues caused by the HDMI Forum regarding HDMI 2.1 on AMD GPUs.

The issues I meant in the initial posting seemed like general technological limitations of AM5 motherboards with Ryzen 7000 CPUs at the time. That’s the main reason I was waiting for 8000G APUs with an upgraded GPU that “finally” brought full native HDMI 2.1 output to motherboards’ HDMI ports without the need for any active DisplayPort adapters.

[aBav.Normie-Pleb]

@aBav.Normie-Pleb

BUT I’ve encountered 1 issue I can’t explain:

• I get a video signal from the moment of POST until the little Windows logo booting sequence.
• The moment it switches to the actual Windows desktop environment the signal is lost (It doesn’t matter what resolution has been selected, even something like 1920x1080/60 Hz doesn’t work).

The issue has been solved in the new AMD Adrenalin drivers 24.6.1, yay.

Now for me the only remaining point for using 8000G APUs is the AV1 encoding capability.