RX 580 displaying nothing until desktop

Hi.

I have a pretty stable hackintosh vanilla build with a few things I need to work on. I don’t really want to work on anything before I get this resolved. I recently bought a AMD RX 580 for cheap that was used for mining. It works as expected once I get into OSX with normal scores in benchmarks.

I’m having problems with the monitors not displaying anything before getting into OSX. If I set “initial display” to PCIE1 instead of IGFX nothing happens until I get a very short apple loading bar and the desktop appears. I then have to unplug the power from the RX 580 to be able to revert to IGFX to see the boot screen and clover.

I had the intel UHD 630 working before installing the RX 580 after having some troubles.

https://www.reddit.com/r/hackintosh/comments/ai0im7/igpu\_uhd\_630\_not\_working\_on\_hs/

Now I know this is probably not HackOS related but I have a feeling this is a bios setting that I need to figure out. The Thunderbolt 3 Alpine ridge is working (no hot plug) and I have the feeling that might be a part of the problem as well. Seller said the bios of the card had not been touched.

I have a dual monitor setup:

Tried different combinations of connections on boot. Nothing gives results until I revert to IGFX as first boot up. Not even IGFX only connected.

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System:

OSX: 10.13.6

MOBO: Gigabyte Aorus Z370 Gaming K3

CPU: Intel core i5 8500

RAM: Corsair 32GB (2x16) 2666MHz DDR4

SSD1: Samsung 970 EVO M.2 500GB (MAC OS)

SSD2: 128GB Silicon PowerSSD Ace A55 (WIN 10)

PSU: Cooler Master V750 750W

Other:

Gigabyte PCI Express 2x Thunderbolt 3 running UAD apollo twin duo (gray)

Kexts that I’m currently using in other folder:

AppleALC

FakeSMC_Sensors

FakeSMC

IntelMausiEthernet

Lilu

USBInjectAll

WhateverGreen

Drivers UEFI:

ApfsDriverLoader-64

AptioMemoryFix-63

FSInject-64

VBoxHfs-64