[Success] AMD RX6000 Series working in macOS

[gabevf]

@gabevf Thanks! I see there's still only one display overall and AGDC has loaded, so this must be on 'igfxonln=1' only. Curiously, HDMI audio no longer loads properly on GFX2.
I guess @ramazarusx will want to try these boot flags.

@etorix just to clarify, I haven't changed anything! I'm back to my previous BIOS & config.plist settings and the GPUs are working fine.

Again, idk what did the trick – I think it was a PSU power cycle, to be honest.

I do think that the issue is related to WEG, but idk how to reach out to the developers to troubleshoot.

 

[zabalex]

Hello guys,
I just purchased my new

Sappshire Radeon RX 6800 XT 12Gb​

and tried fitting it into my BigSur rig. It would replace my Gigabyte Vega 64.
I got it in, plugged one of my two monitors into a single available HDMI slot on the GPU, others are Displayports, and I realized I don't have any. While I ordered the cables, I wanted to give this now card a go. However, I couldn't go past the BIOS screen. Rebooted, same thing. Felt like my input devices are disconnected.

Any idea what this could be?

 

[oli.mathieu]

Hello guys,
I just purchased my new

Sappshire Radeon RX 6800 XT 12Gb​

and tried fitting it into my BigSur rig. It would replace my Gigabyte Vega 64.
I got it in, plugged one of my two monitors into a single available HDMI slot on the GPU, others are Displayports, and I realized I don't have any. While I ordered the cables, I wanted to give this now card a go. However, I couldn't go past the BIOS screen. Rebooted, same thing. Felt like my input devices are disconnected.

Any idea what this could be?

12Gb .... strange

 

[zabalex]

12Gb .... strange

Sorry, typo, 16Gb

 

[joostiphone]

Hello guys,
I just purchased my new

Sappshire Radeon RX 6800 XT 12Gb​

and tried fitting it into my BigSur rig. It would replace my Gigabyte Vega 64.
I got it in, plugged one of my two monitors into a single available HDMI slot on the GPU, others are Displayports, and I realized I don't have any. While I ordered the cables, I wanted to give this now card a go. However, I couldn't go past the BIOS screen. Rebooted, same thing. Felt like my input devices are disconnected.

Any idea what this could be?

RX 6800 XT support started with Monterey 12.1 if I remember correctly.

 

[zabalex]

I think what inspired me to even buy this card was the [success] prefix to this forum's thread with BigSur in its title line.
You're probably right about the formal support, however at this point I can't even enter bios, feels like I'm stuck on the first load screen where I should be able to select DEL, F12, etc. but I can't. Nothing that I press on my keyboard makes any difference. I can reboot, returning to the same start screen.

 

[zabalex]

I had to switch back to my Vega 64 for the time being, I need to work, and I rolled back as of right now.
I'll follow recommendations and will keep switching to try other solutions, so please contribute.

 

[oli.mathieu]

RX 6800 XT support started with Monterey 12.1 if I remember correctly.

it was RX 6600 (XT) .. No offense

 

[joostiphone]

it was RX 6600 (XT) .. No offense

haha no worries. Most importantly, it wasn't Big Sur If you want to get the latest AMD cards to work when supported by Apple, Monterey is the OS to be on.

 

[oli.mathieu]

I had to switch back to my Vega 64 for the time being, I need to work, and I rolled back as of right now.
I'll follow recommendations and will keep switching to try other solutions, so please contribute.

Do you add the boot arg : agdpmod=pikera ?