RX580 DP and HDMI Audio stutters/skips with more than one monitor connected (macOS Monterey)

[tsanko.dimitrov]

Hello,

I have a strange issue with my build. Hardware is the following:
CPU: Intel Core i7-11700K
MB: Gigabyte Z590 VISION D
GPU: Gigabyte RX580 Gaming 4GB 3xDP, 1xHDMI, 1xDVI
Monitors: 1x DELL UP2716D, 1x DELL UP2516D, 1x LED TV 49"
OS: macOS Monterey 12.0.1
SMBIOS: MacPro7,1

So the problem I have: when I connect more than one monitor to the GPU, I'm experiencing a DP and HDMI audio issues (stutters/skips) when I'm playing music with VLC, YouTube or iTunes etc. When I put load to the GPU, the problem goes away. No issues with the onboard ALC4080 audio.

CPU power management is working properly, GPU power management is injected too (AGPMInjector). Tested with and without CPUFriend incl. CPUFriendDataProvider kexts. Nothing seems to give a positive sign. The GPU was working fine on Big Sur but in another build. The GPU BIOS is flashed with the stock BIOS file. The name of the GPU is: GV-RX580GAMING-4GD F11 with HYNIX memory.

Attached you will find the full EFI and IOReg.

The GPU is working properly under Windows 11 and Linux.

Any help is appreciated.

 

[tsanko.dimitrov]

Fixed. For more information please read this.