Hi!
I followed your guide to get firstly my high sierra install finally working with my 980 ti, which was fine, but after that I decided to upgrade to a rx vega 64 (sapphire aircooled reference edition) and mojave 10.14.4, and here are where the problems start for me, no matter how I inject the vgtab settings as soon as I run geekbench or valley my pc just shuts down, while I can easily run them under windows so its not a psu/gpu related issue.
Any idea how I could fix it? I think it may be related to the fact that I have to run osxaptio-free2000, but can't get 10.14.4 to boot without it (was able to boot 10.14.0 without it but well i cannot roll back to that sadly cause i don't have the usb installer anymore).
I have attached my current EFI, any help would be hugely appreciated!
Edit: also attached my DSDT, IOReg, and screenshot of pci, and bios.
Thanks,
sen