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OpenCore GPU Configuration

Joined
Apr 27, 2020
Messages
120
Motherboard
Gigabyte Designare EX X299
CPU
i9-9940X
Graphics
2x RX 6900XT, 1x RX 6800
Mac
  1. MacBook Pro
Classic Mac
  1. iMac
Mobile Phone
  1. iOS
I’m trying to switch from Clover to OpenCore (0.6.6), and I’m running into trouble around graphics configuration on High Sierra 10.13.6.

Because my BIOS (version F6) doesn’t have the “above 4g decoding” option available, I’m only able to boot with the ncpi=0x2000 or ncpi=0x3000 boot args, but I can’t get GPU acceleration to work.

WebDrivers are installed but he GPU’s show up as “VGA enabled devices” in System Information > PCI.

Is this a hardware mapping issue?
Whatevergreen issue?
4g decoding BIOS issue?

Appreciate any help!
 

Feartech

Moderator
Joined
Aug 3, 2013
Messages
24,185
Motherboard
Asus N752VX-OpenCore
CPU
i7-6700HQ / HM170
Graphics
HD 530 1920 x 1080
Mac
  1. iMac
Mobile Phone
  1. iOS
I’m trying to switch from Clover to OpenCore (0.6.6), and I’m running into trouble around graphics configuration.

Because my BIOS doesn’t have the “above 4g decoding” option available, I’m only able to boot with the ncpi=0x2000 or ncpi=0x3000 boot args, but I can’t get GPU acceleration to work.

WebDrivers are installed but he GPU’s show up as “VGA enabled devices” in System Information > PCI.

Is this a hardware mapping issue?
Whatevergreen issue?
4g decoding BIOS issue?

Any help would be appreciated.
what version of macOS are you running?
 
Joined
Apr 27, 2020
Messages
120
Motherboard
Gigabyte Designare EX X299
CPU
i9-9940X
Graphics
2x RX 6900XT, 1x RX 6800
Mac
  1. MacBook Pro
Classic Mac
  1. iMac
Mobile Phone
  1. iOS
what version of macOS are you running?
Sorry, I added this info after I posted.
I’m running 10.13.6, latest build.

Web drivers work fine under Clover.
The drivers even give me the option to switch to the Nvidia graphics (requires restart), but there’s no change after restart.

edit: forgot to emphasize the fact that I’m running three GPUs (gtx 1080ti) on my machine!
 
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