Upgrade to RX 6650 XT

hackryzentosh

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AMD OS X Member
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Jan 27, 2021
Messages
50
Hi guys,
I just bought a new gpu, the Asus Strix RX 6650 XT.
My previous gpu was the RX 570 and everything worked fine.

With this new gpu i knew i had to do a gpu spoof... so i tried by setting SSDT-BRG0 but no luck at the moment.

Do you have a guide or any tips for me?

Thank you in advance!
 

leesurone

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May 6, 2020
Messages
387
Hi guys,
I just bought a new gpu, the Asus Strix RX 6650 XT.
My previous gpu was the RX 570 and everything worked fine.

With this new gpu i knew i had to do a gpu spoof... so i tried by setting SSDT-BRG0 but no luck at the moment.

Do you have a guide or any tips for me?

Thank you in advance!
Besides the SSDT you also need to add the device-id in the DeviceProperties section of the config.plist. You can find it using Gfxutil. See here #1,304
 

hackryzentosh

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AMD OS X Member
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Jan 27, 2021
Messages
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So I did that and now it boots just fine, but it says my gpu has 7 mb of memory... and it is slow... I don't understand why... help :cry:
 

hackryzentosh

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AMD OS X Member
Joined
Jan 27, 2021
Messages
50
I just want to update with the solution I found:
I did a double check of my efi and then
Under NVRAM -> Add -> 7C436110-AB2A-4BBB-A880-FE41995C9F82 -> boot-args, append the boot arg agdpmod=pikera -radcodec

Cheers :cool:
 

hackryzentosh

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Jan 27, 2021
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Attachments

  • SSDT-BRG0.zip
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Galve2000

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Sep 19, 2020
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Thank you sir.. it turns out my Gigabyte 6650 OC work out of the box with a simple Device ID spoof.. but I will save your SSDT-BRGO in case I need it at some point.

It turns out that not disabling the iGPU of my 7950X caused issues with GFXBench Metal. but once I disabled the iGPU it came to life.
 

ExtremeXT

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Aug 7, 2022
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Thank you sir.. it turns out my Gigabyte 6650 OC work out of the box with a simple Device ID spoof.. but I will save your SSDT-BRGO in case I need it at some point.

It turns out that not disabling the iGPU of my 7950X caused issues with GFXBench Metal. but once I disabled the iGPU it came to life.
Most AMD desktops don't need bridge definitions for Navi cards.
 
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