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[Solved] eGPU error 12 fail after update to Windows 10 1903 or newer (OS Build 18362.329 or newer) inc downgrade pci.sys version solution  

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tsakal
(@tsakal)
Reputable Member
Joined: 2 years ago
 

@macjj, as I use my bootcamp on an external ssd and use it only fro gaming steam games as long as they play on the 1903 version I dont need to upgrade to the newest windows version. So I have not felt the need to bother with the pci.sys. 

 

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

C) 2.7 GHz I7 4 Cores, 16Gb, 1TB MBP 13 2018 TB3 , EGPU Gigabyte Gaming Box RX580 8Gb, Mac OS Catalina 10.15.2, Ext SSD Windows 10 1803

D) 3.1 GHz I7, 16Gb, 1TB MBP 13 2015 TB2 , EGPU Gigabyte Gaming Box RX580 8Gb


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Anchoricex
(@anchoricex)
Trusted Member
Joined: 4 years ago
 

Is the pci.sys thing STILL not fixed on windows’ end? Are they aware that their update broke eGPU’s? We’re a few months away from having dealt with this issue for a year. I can’t tell if this was intentional by Microsoft or they’re blissfully unaware of the issue. 

This post was modified 4 months ago

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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Ningauble77
(@ningauble77)
Reputable Member
Joined: 3 years ago
 

Microsoft is aware, I used the Windows 10 Feedback Hub app to report it very shortly after the first problematic system update:

  https://aka.ms/AA65meb  

They did say they were working on it and want me to be able to use my egpu, for whatever that is worth.  The response from a Microsoft rep was a couple months ago.

2019 16 Macbook Pro + Core v2 + Radeon VII MacOS 10.15.1
Core X Chroma + RTX 2080 Windows 10 1909
Asrock X570 Phantom Gaming ITX/TB3, Ryzen 5 3400G + Core v2 + Radeon VII Win10 1909

 
2019 ASRock X570 Phantom Gaming-ITX/TB3 [R3K,4C,G] + Radeon VII @ 32Gbps-TB3 (Razer Core V2) + Win10 1909 [build link]  


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johnot
(@johnot)
New Member
Joined: 5 months ago
 

@macjj, I tried the pci.sys method (same file from this thread) with Windows 10 2004, but I got:

  • Black screen booting with iGPU (couldn't do a hot-plug)
  • Flickering windows logo on cold-plug (it seems to continue booting in the background, because I have SCPToolkit which makes a sound every time I login, and it did)

I then decided to reinstall Windows 1903.30, but got:

  • Flickering windows logo on cold-plug
  • BSOD's (different errors) when I hot-plug

 

This post was modified 4 months ago

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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Mark Bernardinis
(@mark_bernardinis)
New Member
Joined: 4 months ago
 
Posted by: @johnot

@macjj, I tried the pci.sys method (same file from this thread) with Windows 10 2004, but I got:

  • Black screen booting with iGPU (couldn't do a hot-plug)
  • Flickering windows logo on cold-plug (it seems to continue booting in the background, because I have SCPToolkit which makes a sound every time I login, and it did)

I then decided to reinstall Windows 1903.30, but got:

  • Flickering windows logo on cold-plug
  • BSOD's (different errors) when I hot-plug

 

I have yet to upgrade to 2004 but I did the pci.sys trick (it is dated 19/3/2019) with 1903, OS build 18362.900 and this build works with the latest patches applied.

When I click Check for updates I am not given the option to install the "Feature update to Windows 10, version 2004". Based on your experience I will hold off on that upgrade for the time being.

It definitely is an issue with the pci.sys upgrade as I confirmed that the pci.sys dated 23/6/2020 (well that is the date on my system - I may have modified it when I renamed it) doesn't work and I had to apply the old pci.sys again. Microsoft need to expedite their fix - it's very annoying.

MacBook Pro 2020 13" 10th Gen CPU, 2TB, 32GB RAM, Razer Core X Chroma, 5700 XT (pci.sys patch)


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FromTheVault
(@fromthevault)
New Member
Joined: 4 months ago
 

Does this affect all graphics cards, or just AMD? I'm just wondering as I've got a new XPS 9300 and want to know what this error does, and how to avoid it.

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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miraliska
(@miraliska)
New Member
Joined: 4 months ago
 
Posted by: @daniele_pugliese

Temporary Fix [by @bas_timer]

A quick analysis shows that in `pci.sys`, a function called "PciOverrideBridgeRequirements" got changed between .1 and .329 to add 2 additional override cases from the initial build of pci.sys. There does not seem to be a registry change to bypass this, but perhaps this can be overridden from ACPI: that's a slightly later concern I might look into, it does seem to act on a resource requirement value. For now, downgrading system32\drivers\pci.sys to the version shipped with the initial 18362.1/.10 ISO (take ownership, rename, replace) works fine, but it might be this'll need to be put back to allow future CUs editing this file to be installed. Perhaps as a workaround references to pci.sys in the registry could be renamed to, say, pci2.sys as well, but I'm not certain about this...

  • Open install.wim with 7-Zip
  • Mount the Image and then extract the following file
  • X:\sources\install.wim\1\Windows\System32\drivers\pci.sys
  • After updating Windows to 1903/1909 boot from an "Emergency" USB-Drive and replace Windows\System32\drivers\pci.sys with the extract one.
  • Reboot and your AMD eGPU will working.

Thank You very much, this works fine!

HP Spectre x360 13-aw0108nc + Sapphire GearBox TB3 + ASUS Radeon RX5700XT-8G, Win 10 20H1 (v2004)


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Magwezie
(@magwezie)
Active Member
Joined: 2 years ago
 

@tsakal, I started out with 1903, found the system did not seem to perform well. Had a lot of hanging and just a general feeling of sluggish performance. 

I did a couple of reinstallations with same results. Since I have now used the newer version of Windows and the PCI.sys fix, the system feels just like it should.

I am also getting slightly better framerates than I was getting previously. 

Most recently playing Fortnite getting an extra 10 FPS (around 50 - 60) with all settings at EPIC.

 

 

 

This post was modified 4 months ago

2018 MacBook Pro 13 inch Touch Bar
Razer Core X Chroma + AMD rx5500 tx


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tsakal
(@tsakal)
Reputable Member
Joined: 2 years ago
 

@magwezie, Thank you for this. In my case I have not had any major issues with sim racing games, just the odd crash here or there. So I stick to 1903 for the time being as it is relatively stable for me. 

 

However, I will try to make a new drive with the latest windows version to see if there is a difference. Which guide did you follow for the pci.sys fix? 

 

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

C) 2.7 GHz I7 4 Cores, 16Gb, 1TB MBP 13 2018 TB3 , EGPU Gigabyte Gaming Box RX580 8Gb, Mac OS Catalina 10.15.2, Ext SSD Windows 10 1803

D) 3.1 GHz I7, 16Gb, 1TB MBP 13 2015 TB2 , EGPU Gigabyte Gaming Box RX580 8Gb


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Magwezie
(@magwezie)
Active Member
Joined: 2 years ago
 

@tsakal

I used the guide provided in this thread by Andreas Thomaidis. It is worth reading it word for word and follow it EXACTLY as stated. I had a couple of issues when I didn't read correctly or save when it said I had to.

As I have previously mentioned it is an AWESOME reference and when followed word for word, worked flawlessly.

 

2018 MacBook Pro 13 inch Touch Bar
Razer Core X Chroma + AMD rx5500 tx


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