Not the original poster, but I did ask for additional info as well. I ended up getting it to install. Here's what worked for me.
Hardware:
MoBo: GAZ97X-UD5H
CPU: Intel i5
Graphics: EVGA GTX 970 4GB
I followed the directions from page 1 on creating the boot media. I did not inject Nvdia drivers. Files that were on the USB; Multibeast, High Sierra & EFI-Backups folder, nothing was listed in the EFI-Backups folder.
All BIOS settings were set as indicated:
VT-d, disabled
CFG-Lock, not an option on motherboard
Secure Boot Mode, disabled
OS Type set as Other OS
IO Serial Port, disabled
XHCI Handoff set to Enabled
Boot to USB device, select "Options", press enter in the first field that's shown (can't remember the name) I had to change the option to nvda_drv=1. Then go back and boot from USB as "Install Mac OS from High Sierra". When the system reboots, press F12 to boot from the USB key. You'll need to go to options and change it to nvda_drv=1 again. When you go back to boot, select "Boot Mac OS High Sierra". Remember each time the installation rebootsEach time the system reboots ensure you press F12 to boot from the USB key.
When you're finally into the OS where you use Multibeast, I used QuickStart, UEFI. For drivers I only required 2; Intel1000E and audio was ALC1150. Installed those with Multibeast and then rebooted. This time DO NOT boot to the USB key and let clover boot. Select "Boot Mac OS High Sierra" and don't got into options, no longer necessary. Only required (for my build anyway) when booting from USB.
System should boot without issue, or at least it did for me.
Hope this helps.