Question Opencore compatibility with Intel/AMD RX VegaM?

[Dasboot5]

@Edhawk,
Is it possible to use this AMD Vega variant in a Laptop that has an Intel i7-8705G APU and AMD RX Vega M? This is an 8th-generation Processor, which should be no problem, but the graphics may not work as Apple never implemented this co-produced processor in any of their laptops. Unless I am wrong?

 

[Edhawk]

Never heard of that type of hybrid CPU before now. So no practical experience for this type of setup, or if the AMD Vega graphics will work in macOS.

My first thoughts were to check the date to make sure it wasn’t 1st April!

Having seen the specs for the CPU, I would say the discrete AMD graphics would probably need to be disabled, with the Intel IGPU (UHD 630) used for all graphics processing. Unless the laptop comes with a MUX Switch in the Bios, which allows you to select either the Intel or AMD graphics as your primary GPU.

The laptop would need an EFI based on the Kaby Lake Refresh CPU, with attention paid to the motherboard Intel chipset, as it may use a 200 or 300 series chipset and they require different setups.

 

[Dasboot5]

@Edhawk,
Thank You... Here is some more info on Vega M
AMD's Vega M (like in the Radeon RX Vega M GL/GH) is different from the Navi architecture. Vega M is based on the older Vega architecture, while Navi represents a newer generation of AMD GPUs. Vega M was a semi-custom design, a collaboration between AMD and Intel, specifically for Intel's Kaby Lake G series CPUs.
Vega M:
A mobile graphics chip, specifically the Radeon RX Vega M GL/GH, found in Intel's Kaby Lake G processors. It combines a Vega GPU with a Kaby Lake processor and HBM2 memory on a single package. While marketed as Vega, some features found in standard Vega GPUs (like Rapid Packed Math or Next Generation Geometry ) were either absent or disabled in Vega M.

 

[Edhawk]

So the hybrid CPU would follow the Kaby Lake guide, except for the IGPU. Which would require NootedRed.kext in place of WhateverGreen.kext.

 

[Dasboot5]

@Edhawk ,@Shaneee
Possibly, but I found someone who had attempted it and failed. (I have no idea what skill level he had.) Not even close to yours or Shaneee's. I bought a used Dell version, and I will make an attempt, not sure if you can block one of the two GPUs. Further, it looks as if Wi-Fi is soldered to the board, which would complicate an attempt further.
Both processors feature two graphics cards each – Intel HD Graphics 630 + AMD Radeon RX Vega M GL. There is a minimal difference in the maximum frequency of the HD Graphics chip – +100 MHz in favor of the i7-8705G (1.1 GHz vs 1.0 GHz). These are the listed wifi drivers.

 

[Edhawk]

Those Intel WiFi cards listed are all supported by Itlwm.kext /Airportitlwm.kext, depending on the macOS version you use.

You can usually disable one of the Graphics cards by using a custom SSDT or boot argument. The SSDT is a better option.