MBP 2018 13” + Razer Core X 5700xt Error 12 and External Screen Activates but Doesn’t Load into Windows.
Using the sapphire pulse nitro plus 5700xt. Tried out a bunch of guides but still cannot get this setup to work. I’ve tried different windows builds (1903, 2004, fast ring insiders), as well as pci.sys replacement, Mac OS efi boot loader (wouldn’t work for me because it always tried to use the _original file and not the new one), disabling root ports, and port dance. I run into error 12 and 207 every time. The furthest I’ve gotten is hot plugging into my turned off device which turns my monitor on and freezes my internal display at the windows logo. This is what happened with my past two cards (580, 5600xt), but they loaded into windows perfectly fine after. Considering just building a PC after all this trouble but wanted to wait a few more days.
Did you try this guide:
I tried other guides but only this worked for me following step-by-step.
I'm running almost a similar setup as you xianzaituoyan. I have a MBP 2018 13" with a 5700XT in a Razer Core X Chroma. The only way I can get my Windows (version 1903) to boot with the egpu is to turn on the MBP without the Thunderbolt cable, wait for the Windows logo with the white dots to start spinning, and then plug in the Thunderbolt cable. I use the left side Thunderbolt port, closest to the screen.