2018 Mac Mini [8th,6C,B] + RX 5700 XT @ 32Gbps-TB3 (Razer Core X Chroma) + macOS 10.15.2 & Win10 1909 [Gibby]
1. Late 2018 Mac mini - i7-8700B/UHD Graphics 630 iGPU/32GM RAM/1TB SSD
2. LG 27" 4K Monitor x2, Samsung 27" 1080P Monitor x1
macOS Catalina 10.15.2 + (Bootcamp) Win10 Pro Version 1909, build 18363.535
1. Connect single monitor using iGPU HDMI port
2. Use Bootcamp to install Windows 10, Version 1909, build 18363.418
3. Apply all available updates (currently to 18363.535)
4. Place pci.sys (renamed to pci-1903.sys) from Win10 Version 1903, build 18362.30 into c:/Windows/system32/drivers/ folder
5. Select Start, Settings, Update & Security, Recovery, Advanced Startup, Restart Now
6. Using command prompt (x:\Windows\system32>) enter the following commands pressing the enter key after each line to perform the rename of pci.sys:
ren pci.sys pci-1909.sys
ren pci-1903.sys pci.sys
7. Select the 'Turn off your PC' button.
8. Disconnect iGPU HDMI cable, connect eGPU to Thunderbolt closest to iGPU HDMI connection
9. Power on
10. Disable Windows Updates
|Tool||Windows / MacOS|
|Geekbench 4||186740 / 183297|
|Geekbench 5||62055 / 63008|
|LuxMark - Luxball||27646 / 27075|
|LuxMark - Mic||17771 / 20858|
|LuxMark - Hotel||2720 / 5102|
Huge thanks to the post here ( https://egpu.io/forums/pc-setup/egpu-fail-after-update-to-windows-19-03/) and @itsage for instructions.
I am able to boot into Windows / MacOS without any issues. Without the pci.sys from 1903 I get the dreaded error 12 in Windows 1909 and no amount of troubleshooting fixed the issue.
- You’ve given me confidence to try this with mysimilar setup, thank you
Did this work for anyone else? I am about to try it but I will first have to clean install Windows 10.
Could you say how did you use CMD to rename the file? Also, did you have to change ownership during that process, because for the life of me I don't get this file ownership thing (This is my first time using Windows at home in the last 10 years). Also where did you get the file from?
I have the same question as @Os. How did you perform step 4? Can you provide a bit more info? I tried searching for the pci.sys file in W10 but I can't find it. Are you using Goalque ‘s automate-eGPU EFI ? Did you DDU after installing all updates? Did you use bootcampdrivers.com?
I will try to provide additional detail as this was a confusing process going into it for me as well.
- Take the pci.sys from Win10 1903 and rename it to an alternate name (I chose pci-1903.sys).
- Browse on your computer to the following directory: c:/Windows/system32/drivers/
- Paste the pci-1903.sys into this folder.
- At this time you will have the unmodified pci.sys from Win10 1909 and in addition the pci-1903.sys files in the c:/Windows/system32/drivers/ directory.
Continue the steps as listed above - I didn't follow any additional guides or steps to take ownership of any files. I hope this helps. If I need to provide more detail please let me know where there is still confusion. I don't have enough posts to embed a picture, but you can find a picture of my 'final state' here: https://imgur.com/a/T6kMlRc
I was able to use command prompt to rename the file as in step 5 above I had selected to reboot into a recovery state for Windows 10. This negates the need for a special boot disk / USB to boot into recovery mode while still allowing you to perform the necessary changes to the local file system without the need to take ownership of the file. I got the file from downloading the ISO from this link: https://tb.rg-adguard.net/public.php using the options in this image: https://imgur.com/a/IyrTMY4 . The following steps are taken from this link: https://egpu.io/forums/pc-setup/egpu-fail-after-update-to-windows-19-03/ and noted by @bas_timer.
- Open install.wim with 7-Zip
- Mount the Image and then extract the following file
I would also like to add that a Bootcamp update was just released (6.1.10) and it has provided approximately an additional 3-5% performance boost to the benchmarks linked above.
Thank you excellent guide.
Do you know whether this will work with a 2018 mbp 13?
A) 2020 MacBook Pro, i7-1038NG7, 32GB RAM, 1TB, EGPU Razer Core X, Nitro+ RX5700 xt 8Gb, Samsung 65 Q70R
Mac OS Catalina 10.15.5, Internal Bootcamp Windows 10 2004 pci.sys swap.
B) 2.7 GHz I7 4 Cores, 16Gb, 1TB MBP 13 2018 TB3 , EGPU Razer Core X, Nitro+ RX5700 xt 8Gb, LG 32UK550
Mac OS Catalina 10.15.2, Ext SSD Windows 10 1903 V1 .295
Although I do not have access to a MB Pro to validate, yes, I would expect similar results.
Thanks for the explanation and info about Bootcamp update. I took a little break from trying while replacing my new GPU card to the XT. I just realized it was only a marginal difference. Once my card comes, I will start running some more trials on the pci.sys method. Let me know if something else worked for you