(RX 480 + HD 530) Can't get to High Sierra installer.

My specs: i7 6700k-RX480-Asus Z170P

As I say in the title, I can't get in the installer with my rx 480 plugged in. Even setting IGPU as primary in UEFI will fail. (I get something like "Window Server Service only ran for 0 seconds" error) If I plug out the gpu from the pc, I can get to the installer and even boot in the os (no acceleration though, even with intelgraphicsfixup kext) I plug the gpu in again and get stuck on something like "gIOScreenLockState 3" on boot.

If somebody got to install HS on a 480, please help me. I can provide more info if needed.

submitted by /u/AyyEmmDee22
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