2018 15" MacBook Pro (Vega20) [8th,6C,H] + RX Vega 64 @ 32Gbps-TB3 (PowerColor Gaming Station) + macOS 10.14.2 & Win10 [Clustre] // 2x4K , 1x1080P over Thunderbolt1  

Thank you for sharing this nice build! Are you using the Apple provided Boot Camp drivers or the modified Radeon drivers from Bootcampdrivers.com?

I am using the provided Boot Camp drivers, as installing modified Radeon drivers broke my bluetooth connection. 

So I figured out how to install updated drivers for the Vega 64:
- Download newest drivers from AMD Website
- Extract the exe with 7zip
- Go into Device Manager, select the Vega, and click updated driver
- Select "Have Disk" and direct it into the folder that contains the setup for Video Driver 
- It will restart a few times, screen will screw up, etc but it will update

Game performance improved MASSIVELY. Without updated drivers, I was getting random fps drops in GTA V, now it is locked at 60 max settings with VSync on.

Does that same Radeon driver work for the Vega 20 dGPU? How long do you wait until the internal come back on?

Since I just installed the 19.1.1 Drivers for Vega 64 only (through device manager), the Vega 20 GPU drivers don't seem to have been updated. The internal display comes on immediately if I boot without eGPU plugged in, and to get Vega 64 working again I have to hotplug and start the restart sequence again.

Thank you for the additional details. Does the Vega 20 dGPU actually work for internal display eGPU acceleration through Windows Graphics option?

Only when the eGPU is not plugged in. When the eGPU is plugged in the Vega 20 is completely disabled (device manager shows that the device could not be started) and AMD xConnect is being used to power the internal display. This can be seen through both Device Manager, and the Task Manager (only GPU that shows is Vega 64). I have not tried eGPU and only internal display yet, with no external connected.

Posted by: Clustre

Only when the eGPU is not plugged in. When the eGPU is plugged in the Vega 20 is completely disabled (device manager shows that the device could not be started) and AMD xConnect is being used to power the internal display. This can be seen through both Device Manager, and the Task Manager (only GPU that shows is Vega 64). I have not tried eGPU and only internal display yet, with no external connected.

This is (unfortunately) a standard issue all MacBooks with AMD dGPU share: The AMD dGPU can't be used with an AMD eGPU in Bootcamp. It's almost a completely showstopper for Windows users. Acceleration on the internal display on this particular MacBook model (15-inch 2018) is not possible at all.

Posted by: OliverB

This is (unfortunately) a standard issue all MacBooks with AMD dGPU share: The AMD dGPU can't be used with an AMD eGPU in Bootcamp. It's almost a completely showstopper for Windows users. Acceleration on the internal display on this particular MacBook model (15-inch 2018) is not possible at all.

@oliverb we have found a way: https://egpu.io/forums/builds/mid-2018-15-macbook-pro-touchbar-radeon-vii32gbps-tb3-razer-core-macos-10-14-4-win10-1809-itsage/#post-55076

Posted by: mac_editor

Posted by: OliverB

This is (unfortunately) a standard issue all MacBooks with AMD dGPU share: The AMD dGPU can't be used with an AMD eGPU in Bootcamp. It's almost a completely showstopper for Windows users. Acceleration on the internal display on this particular MacBook model (15-inch 2018) is not possible at all.

@oliverb we have found a way: https://egpu.io/forums/builds/mid-2018-15-macbook-pro-touchbar-radeon-vii32gbps-tb3-razer-core-macos-10-14-4-win10-1809-itsage/#post-55076

Oh, fantastic!... my last information was that the procedure was not practicable. I will test it with my dGPU Radeon Pro 560x and eGPU Radeon RX 580.

Congratulations to @mac_editor and @itsage

What works for two, should work for three, too.

Only I had to uninstall both AMD eGPUs before rebooting, if not, the internal screen goes black. Is there any way that this step is not necessary?

Credit goes to @chris_moran and his build guide that details the effort he went through to produce fully functional internal display with AMD eGPU. I read it carefully and realized Windows has a slight delay when initializing a "new" graphics card connection during the booting process. This 1-2 second timeframe allows the internal display of 2018 15" MacBook Pro to come on. That's why we need to manually uninstall the AMD eGPU/s prior to next boot so that Windows will again produce this slight delay.

A program that automatically uninstalls the AMD eGPUs when shutting down, could be very helpful.

Is there any hint/idea why the interal screen goes black in the first hand?

@oliverb am already working on that program. Will take time since I'm completely unfamiliar with Batch.

Posted by: mac_editor

@oliverb am already working on that program. Will take time since I'm completely unfamiliar with Batch.

This is not easy, I am coming from the Unix/Linux world, too...":" replace ";" and vice versa.. hmmm.

Given @chris_moran's work on that build guide, I presume using PowerShell he could do this in an hour or two :p

Hi everyone. Thank you all for your awesome work to help people sort out their eGPU issues. I’ve followed the steps and referred to other posts, and finally get my enclosure to work. But, there are problems. I’m using a similar set up as you,

2018 15-inch Macbook Pro

CPU: i9 8th 6C H

eGPU: Radeon RX Vega 64 Liquid + Razer Core X Chroma

dGPU: Radeon Pro Vega 20

MacOS: Catalina 10.15.1

BootCamp: Windows 10 1903 18362.295

AMD Software: 19.2.2 (bootcampdriver.com)

External monitor: LG 27UL850 4K

Everything works perfectly when I hot-plug in the eGPU at the top right TB3. Win10 made a noise that we usually get when plug in a device. Then wait for a few seconds later, the external monitor is on and successfully show everything as planned. The internal display is operating normally.

However, when I manually uninstalled the Vega 64 (shown as “Radeon RX Vega” at device manager) and unplug the eGPU, booted into OS X (everything was perfect as usual in OS X) then back to Windows. Everything became very unstable. When I did the process and hot-plug in the eGPU, nothing was identified. And when I tried to restart the system, it would freeze at the shutting down process (says “shutting down” with the spinning wheel in the middle) for a unusual long time. When I tried to unplug everything and just clean booted into Windows then restarted, this problem remained.

Do you know why it happens to be unstable? Does it to do with the driver? What is the best AMD driver to use today? Could you help me?

Thank you very much, guys!

Bill

@bill_t_xu_chuzhengnan

Hi Bill, I just ordered the same monitor as you are using - mind if I ask how you are finding it?

@eightarmedpet

Hi there! Personally I think it’s brilliant! Lighter than I thought.

Bill

@bill_t_xu_chuzhengnan

cheers for the reply buddy! Any chance I could twist ya arm to post some more pics of your set up? Haven't seen many real world photos of the monitor, just product shots, which are prob renders.

@eightarmedpet

Hi, I would love to but I'm not sure how. There's no button to insert a photo. I just tested the monitor with some video games. To be honest, the sound speaker of this monitor is far worse than what we have in a MacBook Pro.