rich4653 0 Posted November 2, 2020 Share Posted November 2, 2020 Had to jump through a few hoops to spoof my GPU device-id. I thought sharing might help somebody else out because I couldn't find this particular pattern anywhere... First I had to create an SSDT to (I assume) define GFX0 as shown: DefinitionBlock ("", "SSDT", 2, "DRTNIA", "AMDGPU", 0x00001000) { External (_SB_.PCI0.GPP8, DeviceObj) Scope (\_SB.PCI0.GPP8) { Device (GFX0) { Name (_ADR, Zero) // _ADR: Address } } } Wasn't able to successfully define the device-id in the SSDT, but once I added GFX0 in the SSDT, I was able to set it via DeviceProperties. Along the lines of: DeviceProperties -> Add -> PciRoot(0x0)/Pci(0x2,0x0) -> device-id where PciRoot for GFX0 can be found with gfxutil, and device-id will be specific to your GPU My system: MSI B450 Mortar Ryzen 5 3600 AMD FirePro W5100 Opencore 0.6.2 Catalina 10.15.7 Quote Link to post Share on other sites
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