ERROR 12 on BOOTCAMP HAS BEEN FIXED BY MICROSOFT! in WINDOWS INSIDER (FAST) !
 
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ERROR 12 on BOOTCAMP HAS BEEN FIXED BY MICROSOFT! in WINDOWS INSIDER (FAST) !  

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Martin Svehla
(@martin_svehla)
Active Member
Joined: 1 month ago
 

@valkyrionetz, thank you for the reply, im going to try it right now on my imac.

 

iMac 27'' 5k late 2015
4 GHz Quad-Core Intel Core i7
32 GB 1867 MHz DDR3
AMD Radeon R9 M390 2 GB
eGPU RX 5700 XT + SAPPHIRE enclosure


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JesterOfTorutuga
(@jesteroftorutuga)
Active Member
Joined: 2 months ago
 

Hey everyone,

Ended up getting 1909 working no problem by swapping in the pci.sys file extracted from a 1903 V1 ISO (as explained elsewhere on this forum).

This I think is actually the simplest option for BootCamp users, since you can skip the bootable Windows USB step by simply putting the pci.sys file on a stick, booting in mac, and dragging it into the appropriate part of the bootcamp partition from there.

I have made backups of the working pci.sys file for personal use for all future Windows builds that don't work Smile

2018 15" MacBook Pro (RP560X) (8th,6C,H) + Sonnet Breakaway 550 w/RX5700 XT + MacOS 10.15.5 + Windows 10 2004

(Solved Error 12 in both 1909 and 2004 with the 1903 pci.sys file swap, as explained here: https://egpu.io/forums/pc-setup/egpu-fail-after-update-to-windows-19-03/)

 
2018 15" MacBook Pro (RP560X) [8th,6C,H] + RX 5700 XT @ 32Gbps-TB3 (Sonnet Breakaway 550) + macOS 10.15.5 & Win10 [build link]  


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Valkyrionetz
(@valkyrionetz)
Active Member
Joined: 1 year ago
 

@jesteroftorutuga, Interesting. I remember reading all the steps on how to fix error 12 and I don't believe this method is mentioned. If I'm not mistaken, would you mind elaborating on it more for us that aren't familiar with it? Thanks 😁

 

iMac Late 2014 with the 5k display, Core i7-4790K, R295X, Razer Core X with Thunderbolt 2 adapter, AMD Radeon VII and an HP Omen X 27 external gaming display


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orchoidizer
(@orchoidizer)
Active Member
Joined: 10 months ago
 
Posted by: @dabesdiabetic

Have you tried playing around with disabling some of the cores? A user over on reddit has a detailed a post on doing this and doubling his FPS. Essentially the games can't use them anyways and because they scale (or some technical term) they still run and produce heat creating the throttle. Might be worth looking into.

Cant find this on reddit. What is the name of the thread where this is posted so I can do a search for it? Thanks

Mid 2015 15-inch MacBook Pro Retina (2.2GHz Intel quad Core i7)
Intel Iris Pro Graphics. Thunderbolt 2, High Sierra - Bootcamp Win10 1903 (18362.39)
Razer Core X - Vega 64, Apple TB3 to TB2 Adapter ,- 2m TB2 cable


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andygev35
(@andygev35)
Estimable Member
Joined: 3 months ago
 

@orchoidizer, I believe I've seen that before as well... I think the user was using Process Lasso to limit the number of cores used by a specific application.

 

2020 MacBook Pro, i5-1038NG7, 16GB RAM, 1TB
Razer Core X
Sapphire Pulse RX 5700 XT Dual BIOS

 
2020 13" MacBook Pro [10th,4C,G] + RX Vega 56 @ 32Gbps-TB3 (Razer Core X) + macOS 10.15.4 & Win10 [build link]  


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orchoidizer
(@orchoidizer)
Active Member
Joined: 10 months ago
 

@andygev35, Thanks. That looks a bit advanced for me. Will have to read up on it before dipping my toes in that.

 

Mid 2015 15-inch MacBook Pro Retina (2.2GHz Intel quad Core i7)
Intel Iris Pro Graphics. Thunderbolt 2, High Sierra - Bootcamp Win10 1903 (18362.39)
Razer Core X - Vega 64, Apple TB3 to TB2 Adapter ,- 2m TB2 cable


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arouris
(@arouris)
Eminent Member
Joined: 4 months ago
 

@jesteroftorutuga, I tried doing that on Windows Insider Fast (2004) and replaced the pci.sys from 1809. That rendered windows unbootable with repair kicking in (automatic repair at boot) and being unable to fix the problem. Then I put back the 2004 pci.sys and Windows were again bootable (but no egpu).

 

Mac Mini 2018 (Core i5), Sonnet 550 enclosure, Sapphire 5700 XT Nitro


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Arizor
(@arizor)
Eminent Member
Joined: 4 months ago
 

Warning folks, the latest Catalina update now has my previously flawless eGPU bootcamp booting into a black screen, not even a Windows loading circle.

2019 16-inch MacBook Pro Retina (2.3ghz Intel i9) // Radeon 5500M (8GB).
MacOS Catalina // Bootcamp Win10 1903 (18362.230).
Razer Core X // Vega 64 // 2m Active Thunderbolt cable.


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orchoidizer
(@orchoidizer)
Active Member
Joined: 10 months ago
 
Posted by: @dabesdiabetic

Have you tried playing around with disabling some of the cores? A user over on reddit has a detailed a post on doing this and doubling his FPS.

@dabesdiabetic, whereabouts on reddit is the post?

I've looked all around for it with no sucess.

Can you give some kind of indication where the post is.

Thanks

 

Mid 2015 15-inch MacBook Pro Retina (2.2GHz Intel quad Core i7)
Intel Iris Pro Graphics. Thunderbolt 2, High Sierra - Bootcamp Win10 1903 (18362.39)
Razer Core X - Vega 64, Apple TB3 to TB2 Adapter ,- 2m TB2 cable


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buttsaggybob
(@buttsaggybob)
Active Member
Joined: 2 months ago
 

I can confirm I got it working. I'm running a 2018 Macbook Pro 15" with the RP560X along with a Razer Core X and a Gigabyte RX5700XT. I originally had a working installation of W10 1903 v1 with DDU and drivers installed in safe mode, and I installed version 2004 fast directly from the iso after extracting it. I let it do its thing, and everything worked perfectly fine after a restart with the egpu plugged in.

Macbook Pro 15" (2018) + Razer Core X + RX 5700XT
Windows 10 2004 (Insider Preview Fast)


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