I have a Mech RX6600 x2, and I've been using HDMI without issues for a while.
I'm trying to use DisplayPort since I want to use the HDMI output to use my TV as a secondary output for big screen gaming, however Adrenaline drivers break DisplayPort.
The cable works, and the GPU outputs to DP when in safe mode, or if I uninstall the AMD drivers. I've tried everything, even a full DDU uninstall and re-install. No dice.
I'm currently running driver 24.10.1.