I would like to thank you for this awesome guide. I ended up going with the same motherboard, same CPU and an AMD card as well. In my case, the
Sapphire Pulse Radeon RX Vega56 8G.
Unfortunately I can't boot into the installer. I use Unibeast 8.1.0, and when it's done I replace the EFI directory with the 4.3 one from your post. When I boot, it successfully launches Clover, then I see the Apple logo, and a couple of seconds later my computer reboots.
Any idea what might be causing this, or how I could go about debugging it?
edit: To give some extra information, I used UEFI boot method, not the legacy method. Besides copying over the 4.3 EFI directory I made no changes.
I was able to follow the guide to the letter, except for "RC6" and "DVMT Pre-Allocated" which don't appear for me. However I have BIOS version 0430 so I'll update it to 1002 to see if that works, since I saw that someone else in this thread also did that (to get 60hz display in their case).
edit: I can boot, but something is wrong...
Found out that for some reason, "primary display" was set to "auto" instead of PCIE. I think it might be incompatible with iGPU Multi Monitor, because when I select that it jumps back to the other setting. I set it to PCIE and set multi monitor to disabled.
Also, I updated the BIOS to 1002.
Here's what happens now:
I can move the mouse, the installer probably works, but my screen is the size of a postage stamp. It looks like 640x480 to me, but with retina enabled...
edit: went through the BIOS section again. I think since updating some settings might have changed. I now see RC6 and DMVT as well, which I didn't see before even after updating. I've set everything to the same as yours. Unfortunately it didn't help, still a tiny screen.