2018 Mac Mini [8th,6C,B] + RX Vega 64 @ 32Gbps-TB3 (Razer Core X) + macOS 10.15....
 
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2018 Mac Mini [8th,6C,B] + RX Vega 64 @ 32Gbps-TB3 (Razer Core X) + macOS 10.15.4 & Win10  

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svertel
(@svertel)
New Member
Joined: 6 months ago
 

System specs

2018 Mac Mini - i5-8500B/Intel UHD630/32GB RAM/256GB SSD

 

eGPU hardware

Razer Core X + MSI Vega 64 Air Boost + 1m Thunderbolt 3 Cable.

 

Installation steps

macOS:
Plug-and-play. Working flawlessly with a Samsung C34J791T at 3440x1440 @ 100Hz

Win10:
All credit goes to @itsage for instructions and @aa15032261 for apple_set_os-loader because i basically just followed their instructions word by word with some minor modifications.

  1. Disable Secure Boot and allow Boot of External Devices [in Recovery Mode]
  2. Install Windows 10 1903 V1 ISO (version 19362.30) through Bootcamp Assistant [in macOS]
  3. Disable automatic Windows Updates through either Group Policy or Services [in Windows]
  4. Disable bottom three PCI Express Root Ports in Device Manager [in Windows]
  5. Run DDU to disable Windows automated driver installation and remove graphics drivers [in Windows]
  6. Hot-plug Radeon eGPU then install drivers from AMD website [in Windows]
  7. Shut computer down instead of Restart prompt through Radeon Installer [in Windows]
  8. Boot with eGPU connected

Nothing disabled in Device Manager. All 4 ports on the mini works with the eGPU. The other 3 ports are used for a usb-hub and 2 external SSDs. I do not have to hot-plug the eGPU after installing drivers.

Notes:
Swapping between macOS and Windows works 90% of the time with the 10% obviously being going from macOS to Windows. Usually shutting down the Mac Mini completely before booting into windows fixes this issue.

 

Benchmarks

macOS:

Benchmark Score GPU
Luxmark 3.1 Luxball 2547 iGPU
Luxmark 3.1 Luxball 29145 eGPU
Luxmark 3.1 Neumann 1752 iGPU
Luxmark 3.1 Neumann 18589 eGPU
Luxmark 3.1 Hotel Lobby 579 iGPU
Luxmark 3.1 Hotel Lobby 4922 eGPU
GeekBench 5 Compute OpenCL 53415 eGPU
GeekBench 5 Compute Metal 53747 eGPU
Unigine Heaven 1080p8xAA D3D11 P:Custom Q:Ultra T:Extreme 1469 eGPU

 

Win10 (Everything using eGPU with the GPU Undervolted):

Benchmark Score
Unigine Heaven 1080p 8xAA D3D11 P:Custom Q:Ultra T:Extreme 2120
Unigine Valley 1080P 8xAA D3D11 Preset: Extreme 3542
Fire Strike Graphics 17210
Time Spy Graphics 7106

 

Comments

Im very happy with finally getting my build to work after struggling a lot since i bought the eGPU. I mostly use the eGPU in Windows for gaming and in macOS for some light work in Blender and Unreal Engine 4. Im able to get playable FPS in Red Dead Redemption 2 with decent settings at 3440x1440. 

Apple Mac Mini 2018 (i5 32GB RAM) + Razer Core X + MSI Vega 64 Air Boost

 
2018 Mac Mini [8th,6C,B] + RX Vega 64 @ 32Gbps-TB3 (Razer Core X) + macOS 10.15.4 & Win10 [build link]  


itsage liked
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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@svertel, Welcome aboard and thank you for sharing this build! The Samsung C34J791 is an excellent ultrawide Thunderbolt 3 monitor. I've also noticed a full shutdown before booting into Windows seems to be more reliable than restart.

 

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 15" HP Spectre X360 [11th,4C,G] + RTX 2080 Ti @ 32Gbps-TB4 (AORUS Gaming Box) + Win10 2004 [build link]  


ReplyQuote
(@brad_sloan)
New Member
Joined: 6 months ago
 

Where did you find the Windows 10 1903 V1 ISO file I have looked everywhere and get the MSU file which I don't know how to open up. Bootcamp doesn't recognize this file either.

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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svertel
(@svertel)
New Member
Joined: 6 months ago
 

@itsage, Thanks. It sure is! Unfortunately I somehow managed to upgrade to catalina 10.15.5 and that totally ruined the build. I'm thinking I might have to do the apple_set_os-loader stuff again because I'm not getting the screen where it tells you to plug in the eGPU and click any key anymore. Basically back to Error 12. Even tried upgrading to 2004 but it behaves the same.

@brad_sloan, There was this site linked here a while back where you could get the specific version of Windows you wanted from a dropdown. I'll see if I can find it because i will most likely need it myself considering the build is not working anymore.

 

 

Apple Mac Mini 2018 (i5 32GB RAM) + Razer Core X + MSI Vega 64 Air Boost

 
2018 Mac Mini [8th,6C,B] + RX Vega 64 @ 32Gbps-TB3 (Razer Core X) + macOS 10.15.4 & Win10 [build link]  


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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@svertel, I've encountered that same behavior too. The fix is to simply redo the process of setting up the modified apple_set_os.efi v0.5 boot loader. Boot back into macOS, mount the Windows boot volume EFI then copy the modified efi file over. You can leave everything else as is.

 

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 15" HP Spectre X360 [11th,4C,G] + RTX 2080 Ti @ 32Gbps-TB4 (AORUS Gaming Box) + Win10 2004 [build link]  


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svertel
(@svertel)
New Member
Joined: 6 months ago
 

@itsage, I couldn't get 2004 to work so I decided to redo everything I did before except this time I installed Windows 1903 on an external SSD using this guide: https://medium.com/@transferx23/install-windows-10-on-an-external-hdd-or-ssd-with-boot-camp-under-macos-catalina-10-15-e0e315f2d48d . I did not expect it to actually work but it did and it seems more stable than ever. I did about 10 restarts and 5 cold boots and it did not fail a single time.

There are two drawbacks with this but theyre very minor.

1. I have to keep a HDMI-cord plugged into the mini until I get to the spinning circles. When the screen starts glitching like crazy I can change source to the Displayport from the eGPU.

2. "Restart in macOS..." using the tray Boot Camp icon does not work. I need to hold the option key during boot or unplug the external SSD to boot into macOS.

@brad_sloan, Sorry for the late reply but I found where to download win 1903: https://tb.rg-adguard.net/public.php  

I used the following in the dropdowns: 

Type: Windows (Final)

Select Version: Windows 10, Version 1903 - 19H1 (build 18362.30)

Select Edition: Windows 10

Select Language: English International

Select File: Take the x64 one

 

 

Apple Mac Mini 2018 (i5 32GB RAM) + Razer Core X + MSI Vega 64 Air Boost

 
2018 Mac Mini [8th,6C,B] + RX Vega 64 @ 32Gbps-TB3 (Razer Core X) + macOS 10.15.4 & Win10 [build link]  


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