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Bootcamp issues with 2015 mid 15-inch Macbook Pro + Razer Core X + Sapphire Vega...
 

Bootcamp issues with 2015 mid 15-inch Macbook Pro + Razer Core X + Sapphire Vega 64 Nitro+  

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Piperx10
(@piperx10)
New Member
Joined: 2 weeks ago
 

Hi everyone, i've been following the egpu guides around here for a while but can't manage to get my eGPU to work on bootcamp.
My setup is the following:

Mid 2015 15-inch Macbook Pro
iGPU: Intel Iris Pro
dGPU: Radeon MX390
OSX: Mojave 10.14.4
Bootcamp: Windows 10 v1809
External Monitor: Samsung CF791

eGPU: Razer Core X
GPU: Sapphire Vega 64 Nitro+

Thunderbolt 3 to Thunderbolt 2 Adapter
Thunderbolt 2 Cable

I didnt have any problems with installation on Mac OS, just run purge.wrangler and that was it. Everything works perfect.

For windows i still can't make it work.
I did fresh install of windows v1809 in bootcamp, then deleted drivers with DDU
I downloaded the drivers from bootcampdrivers.com but when trying to install the drivers i get different outcomes after several tries. When i got black screens, i then proceeded with a system restore after DDU.
1st Outcome: I get 2 Microsoft Display Monitor Adapter, one with yellow cone error 31. There's nothing i can do after this.
2nd Outcome: Sometimes I get black screen after trying to install the drivers with egpu connected. I dont know if i should install the drivers before or after connecting eGPU. AMD adrenalin software says "looking for devices" while installing drivers, so i guess it should be connected.
3rd Outcome: I get the correct drivers, Radeon MX390 displaying and Vega 64 with yellow cone error 12. Then i try apple_set_os.efi guide. I get the EFI selection screen, after booting into windows i only get black screen and freeze.

I don't mind about using the internal display while on bootcamp, as I just plan using the external display with egpu in bootcamp for gaming. Isnt there an easier way if I just want it like this?

*Another doubt: does the external monitor have to be connected to the other thunderbolt 2 port or connected to the eGPU??

If i can get some guidance i would really appreciate it. I don't know which part I am doing wrong.
I've checked every build with the same mid 2015 15-inch macbook pro, followed the steps but nothing.

Mid 2015 15-inch Macbook Pro, Razer Core X, Sapphire Vega 64 Nitro+


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itsage
(@itsage)
Famed Member Admin
Joined: 3 years ago
 

Your configuration is probably the most challenging to set up in Boot Camp. I don't personally have first-hand experience so these are some guesses as to what you can try next. Go with Windows 10 1903 and see if it helps. If you don't care about using the internal display in Boot Camp mode, then boot into Windows with the eGPU connected to get around error 12. The setup procedure would be as followed:

Make sure you don't connect the eGPU until the very last step or when you know drivers for it is fully installed. Also connect the external monitor to the eGPU directly before booting up to get screen output. You don't/shouldn't connect the external monitor through the second TB2 port of MacBook Pro.

Best ultrabooks for eGPU use

eGPU enclosure buying guide


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Piperx10
(@piperx10)
New Member
Joined: 2 weeks ago
 

@itsage

Hi!, thanks for the reply.
After going to the processes over and over again, i finally managed to make it work. However it is still not stable. Here's what i did.

Installed windows 10 v1903
Removed drivers with DDU
Installed latest drivers from bootcampdrivers.com
(*In my mid 2015 15" macbook pro, installing the drivers with or without the egpu connected makes no difference.)

After this, i had the AMD Radeon R9 M370X showing ok and the Radeon Vega 64 showing error 12.

I started messing with enabling and disabling the PCI Root bridges following @nando4 guide on solving egpu error 12 in windows. After many tries, error 12 was gone and my external display finally showed up.

I checked again what i did and basically was this, in this particular order:

Enter to view devices by connection

-Disabled PCI root above the Radeon Vega
-Disabled PCI root above the Radeon R9 M370x dGPU
-Disabled PCI root above the Facetime camera
-Enable PCI root above Radeon Vega.

And then, no more error 12! 
What i think is weird is that, different from other builds i've seen, i have both internal and external display working. (external display connected to eGPU via displayport), which is better than what i expected. Everything working perfect in both displays.

The only problem is that after rebooting or put to sleep, everytime i have to repeat the disabling and enabling process. It takes a few tries though, if the first time didnt work, i enable everything again and start disabling. 

Thanks for the help and the very useful guides and builds in this site. I will still try to find for a more effective way to get the setup running.

Mid 2015 15-inch Macbook Pro, Razer Core X, Sapphire Vega 64 Nitro+


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itsage
(@itsage)
Famed Member Admin
Joined: 3 years ago
 

@piperx10 Good to hear you managed to get the eGPU working. The next step is to find a reliable procedure. Error 12 is definitely a headache for AMD eGPU in Boot Camp. My recommendation is to do a dsdt.aml override so that you can imbed it into a boot loader such as automate-eGPU EFI. I'm doing that with my 2016 15" MacBook Pro [build link] and it's a much nicer and more reliable procedure to use AMD eGPU in Boot Camp.

Best ultrabooks for eGPU use

eGPU enclosure buying guide


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graukatze
(@graukatze)
Active Member
Joined: 2 years ago
 

I had Error 12 as well (RX5700XT) and what solved it was to boot twice into macOS and keeping the eGPU plugged in. The next boot into Windows 10 (1903) worked, no yellow bang on the eGPU. Not sure if this would be reliable, but previously when the eGPU (with RX580) would not work a boot into macOS did the trick as well. No overrides or disabled PCIs.

Macbook Pro 2018 w/ Radeon Pro 560X
Akitio Node and RX5700 XT with Windows 10 1903 and macOS 10.14.6


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Piperx10
(@piperx10)
New Member
Joined: 2 weeks ago
 

@graukatze

Do you have to always boot into macOS twice before logging into windows? or after the first time that was it?
I use macOS for my daily work so its mostly macOS. When switching to windows, i have to disable PCIs to make eGPU work. I dont think rebooting makes a difference.

Mid 2015 15-inch Macbook Pro, Razer Core X, Sapphire Vega 64 Nitro+


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Piperx10
(@piperx10)
New Member
Joined: 2 weeks ago
 

@itsage

Thanks for the recommendation. However, the problem is that using automate-eGPU EFI, i get black screen after logging (im pretty sure im following it step by step), then i have to force reboot. For now, i can deal with enabling, disabling everytime i switch to windows. 

BTW, I discovered that after getting my external display to show with the vega 64, i can re-enable again the R9 M370X dGPU and the facetime PCI with no problems. I guess its not a resource problem then..., with that i can have the internal display using the R9 M370X dGPU and the external display using the vega 64. Is this normal? or is this luck?

Mid 2015 15-inch Macbook Pro, Razer Core X, Sapphire Vega 64 Nitro+


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itsage
(@itsage)
Famed Member Admin
Joined: 3 years ago
 

I think it's priority of allocating resources at boot. Each Mac configuration behaves differently in Boot Camp when setting up with eGPU so it's hard to say what is normal.

Best ultrabooks for eGPU use

eGPU enclosure buying guide


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