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Swapped a Radeon VII for 6900XT Red Devil (xtx) but won't work (Big Sur)

Joined
Apr 23, 2019
Messages
8
Motherboard
Gigabyte Z390 Designare- F9i
CPU
i9-9900K
Graphics
Radeon VII
Mac
  1. MacBook Pro
  2. Mac mini
Mobile Phone
  1. iOS
I have a working Hackintosh, running Big Sur 11.6.1 with a Radeon VII, and so far it works fine for my needs. I used opencore .78 and the Dortania setup guide.

I wanted to speed up video transcodes by installing the powercolor 6900XT red devil, so I took out the VII and popped this one in. I booted it up and it got to about 20% on the apple logo screen and the screen went black. I then added the agdpmod=pikera and it had no effect. I checked the AAPL,ig-platform-id and its set to 0300913E.

I even went as far as attempt to install a fresh copy on a new drive, with the original installer (with pikera boot arg) and it had the same effect, black screen.

I tried all 4 ports (1xhdmi, 3xDP) with the same results.

I verified the card in Windows and its device id is _73BF, subsys _2408148C and according to techpowerup and other sources is an XTX card.

As most users I have seen posting about this card say that it works out of the box, I have had a hard time finding ways to troubleshoot the issue. Most solutions are based on XTXH and spoofing, which I should not need to do.

I would appreciate assistance pointing me in the right direction to troubleshoot this issue.
 
Joined
May 10, 2012
Messages
134
Motherboard
Asus X299 PRO/SE
CPU
i9-10920X
Graphics
6900XT, W6600, W6800
Mac
  1. Mac Pro
Try this solution:
 
Joined
Apr 23, 2019
Messages
8
Motherboard
Gigabyte Z390 Designare- F9i
CPU
i9-9900K
Graphics
Radeon VII
Mac
  1. MacBook Pro
  2. Mac mini
Mobile Phone
  1. iOS
I am using smbios 19,1 to match the hardware, the thread talked about the old mac pro cheesegraters, not sure if it would work on my system.
 
Joined
Aug 23, 2016
Messages
23
Motherboard
GIGABYTE Z97X-UD5H-BK
CPU
i7-4790K
Graphics
Dual RX Vega 64
Mobile Phone
  1. Android
I am using smbios 19,1 to match the hardware, the thread talked about the old mac pro cheesegraters, not sure if it would work on my system.
Hey bud, you ever figured it out?
I think i am having similar issue. Except i am coming from a Sapphire Vega 64 to a Sapphire 6900XT Nitro+ SE.

Popped this card in and got black screen... thought it was my Opencore version... and decided to try to re-install and even that i am still having issues.
been trying to use the latest 0.8.5 and 0.8.4 opencore... MacOS Montery
 
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