ERROR 12 on BOOTCAMP HAS BEEN FIXED BY MICROSOFT! in WINDOWS INSIDER (FAST) !
Windows 10 on the latest fast ring isn't working for me - build 20211.1000. I'm getting error 12. Previously I had a fully updated Win 10 install w/ BCD August drivers and tried the pci.sys method and Windows wouldn't even boot! I took a chance an upgraded to the Insider build based on people saying it was working - but not for me.
MacBook Pro 16" 5500m
Powercooler Red Devil 5700 xt
Just FYI, there’s a report of the latest regular build (Windows 10 Version 2004, Build 19041.508) working without error 12 here:
Maybe try the april bcd drivers?
That's what worked for me.
Argh, I just wish Windows could make their stuff more consistent - that's the one thing I like about Macs, even with apple-enforced limitations--> minimal driver fussing needed.
It either works or it doesn't work --> more time for more productive stuff
Do you have an extra thunderbolt device connected to your computer?
I had resource probs with that a little while back, since my external thunderbolt drive and the eGPU were both connected to one side of my MBP 16" (and thus had to share the same controller).
I tried everything: only egpu connected and switched ports, connected my USB C hub. Nothing worked. And if I connect my nvme enclosure (only the enclosure) windows hangs at login screen and laptop reboots. I'm building a sffpc now, f* it.
@florin_samareanu, That is the same issue I had back in April. I require the pci.sys hack to get the eGPU to work with my 5700XT (16" MBP with 5500m) in Windows 10 1909. I upgraded to the GM version of Win10 2004 when it was available in the fast ring, and my system wouldn't even boot after I reapplied the pci.sys file. The system would Error 12 on me without the pci.sys file. I just have not wanted to break my setup since then, which is why I haven't played with it again.
I might take a stab once the 20H2 version is released later this year.
Edit: strictly using Windows only, gaming mostly