Contribute
Register

[Success] Radeon RX 6800 XT - Big Sur

Joined
May 9, 2010
Messages
223
Motherboard
Gigabyte Z690 Gaming X
CPU
Intel i5-12600K
Graphics
RX 6600 XT
Mobile Phone
  1. iOS
@ThetaK7 - Perhaps all you need to do is add a scaled resolution for 2880x1620? I've used this in the past to add unsupported resolutions for my Intel iGPU:

For an iMac19,1 SMBIOS, I had to add "slide=0" to my boot-args, and specify my Intel UHD 630 as a headless GPU (with AAPL,ig-platform-id set to 0300913E), in order for it to work. I also now use an iMacPro1,1 SMBIOS. (Edited: for corrections).
 
Last edited:
Joined
Oct 28, 2021
Messages
10
Motherboard
Gigabyte X299 DESIGNARE EX
CPU
10940x
Graphics
W6800, Radeon VII
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
@ThetaK7 - Perhaps all you need to do is add a scaled resolution for 2880x1620? I've used this in the past to add unsupported resolutions for my Intel iGPU:

For an iMac19,1 SMBIOS, I had to add "slide=0" to my boot-args, and specify my Intel UHD 630 as a headless GPU (with AAPL,ig-platform-id set to 0300913E), in order for it to work. I also now use an iMacPro1,1 SMBIOS. (Edited: for corrections).

Hi, I think it was an issue with the display. I unplugged power and reconnected, and the proper resolutions came back. W6600 working fine now. Incidentally I'll be sending back as it couldn't compete with my older VII. Thanks for the reply.
 
Joined
Sep 13, 2015
Messages
31
Motherboard
Gigabyte Z690 Aero G
CPU
i9-12900K
Graphics
RX 6800
Mac
  1. Mac Pro
My Gigabyte Radeon RX 6600 XT Eagle 8GB works after upgrading to 12.1 beta. Using CaseySJ's oc 0.7.5 for z490 vision G (changed for smbios iMacPro1,1), using "agdpmod=pikera" boot-arg. :thumbup:
 

Attachments

  • Screen Shot 2021-11-07 at 8.28.39 PM.png
    Screen Shot 2021-11-07 at 8.28.39 PM.png
    31.9 KB · Views: 85
Joined
Nov 13, 2012
Messages
94
Motherboard
Asrock Z390 Phantom Gaming 6
CPU
i9-9900K
Graphics
RX 5700 XT
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
I just want to share an observation I made with my XFX RX 6900XT. I always had random graphic freezes and shorter hangs with this card. I tested on two different Z390 boards. It got worse lately. I was running a iMacPro or macPro smbios without iGPU when these freezes happened.

I switched back to iMac19,1 with headless iGPU and all the problems were gone.
 
Joined
Jun 15, 2012
Messages
508
Motherboard
Gigabyte Z370 AORUS Gaming 7-F13
CPU
i7-8700K OC @ 5.1Ghz
Graphics
RX 6900 XT
Mac
  1. MacBook Pro
  2. Mac Pro
Classic Mac
  1. Performa
Mobile Phone
  1. iOS
I was having freezes wth a 6900XT too, and it was worse on imac 19,1 with IGPU vs imacpro without igpu. but the diagnosis of the freezes finally actually determined that it was caused by intel power gadget's lapic interrupt hook for it's performance metrics. What this had to do with GPU, well they are all interconnected, cpu and gpu communicate directly through PCI lanes and lapic responses so these hooks can destabalize entire kernel.

I contacted author of intel power gadget through their contact email and their response was basically "uninstall it and forget it, because we're never updating it again anyways" (in more words, but basically yes kill it with fire if using it at all, it'll only get worse as macOS gets updates).
 
Joined
Nov 13, 2012
Messages
94
Motherboard
Asrock Z390 Phantom Gaming 6
CPU
i9-9900K
Graphics
RX 5700 XT
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
I was having freezes wth a 6900XT too, and it was worse on imac 19,1 with IGPU vs imacpro without igpu. but the diagnosis of the freezes finally actually determined that it was caused by intel power gadget's lapic interrupt hook for it's performance metrics. What this had to do with GPU, well they are all interconnected, cpu and gpu communicate directly through PCI lanes and lapic responses so these hooks can destabalize entire kernel.

I contacted author of intel power gadget through their contact email and their response was basically "uninstall it and forget it, because we're never updating it again anyways" (in more words, but basically yes kill it with fire if using it at all, it'll only get worse as macOS gets updates).

You mean this one?: https://www.intel.com/content/www/us/en/developer/articles/tool/power-gadget.html :shifty:
 
Joined
May 25, 2020
Messages
2
Motherboard
Gigabyte Z390 M Gaming
CPU
Intel i7 9700K
Graphics
R9 290
Mac
  1. MacBook
Classic Mac
  1. 512K
Mobile Phone
  1. iOS
My Gigabyte Radeon RX 6600 XT Eagle 8GB works after upgrading to 12.1 beta. Using CaseySJ's oc 0.7.5 for z490 vision G (changed for smbios iMacPro1,1), using "agdpmod=pikera" boot-arg. :thumbup:
:eek::eek: I've been waiting to get my rx 6600 xt to work with mac os for a few months now. So you are saying it has GPU accelleration under Monterey and opencore 0.7.5? (with the correct bootarg of course)
 
Joined
Sep 13, 2015
Messages
31
Motherboard
Gigabyte Z690 Aero G
CPU
i9-12900K
Graphics
RX 6800
Mac
  1. Mac Pro
:eek::eek: I've been waiting to get my rx 6600 xt to work with mac os for a few months now. So you are saying it has GPU accelleration under Monterey and opencore 0.7.5? (with the correct bootarg of course)
Yes, 12.1 beta included drivers for 6600 xt. It will not work on 12.0.1.

It’s been running on my system for 3 days now.
 
Joined
May 25, 2020
Messages
2
Motherboard
Gigabyte Z390 M Gaming
CPU
Intel i7 9700K
Graphics
R9 290
Mac
  1. MacBook
Classic Mac
  1. 512K
Mobile Phone
  1. iOS
Yes, 12.1 beta included drivers for 6600 xt. It will not work on 12.0.1.

It’s been running on my system for 3 days now.
WOW! Thank you for the fast answer! I will try installing 12.1
 
Joined
Jun 15, 2012
Messages
508
Motherboard
Gigabyte Z370 AORUS Gaming 7-F13
CPU
i7-8700K OC @ 5.1Ghz
Graphics
RX 6900 XT
Mac
  1. MacBook Pro
  2. Mac Pro
Classic Mac
  1. Performa
Mobile Phone
  1. iOS
Yes. it won't be getting further updates. not after intel and apple's partnership soured. dev confirmed they are pulled off of it. when I sent the freeze/KP issue with it and my gpu, they basically said "just uninstall it, we don't support it anymore"

I do miss the cpu frequency stats and better temp stats in menu, but without intel power badget i can at least get approx temp off one of proximity sensors, and it's clear that if it's discontinued, it's probably only gonna get worse with macOS updates. Heck uninstalling it was recommended to me by vit, so that alone was reason enough.

Whether or not it's same issue as you, don't know. I'd need see the panic report you get after a freeze (upon reboot). assuming you have working nvram and panic dumps on reboots variables enabled on your hack.
 
Top