Two Nvidia GPUs, One OpenCore Ryzen Threadripper PC

I'm trying to boot into the USB OpenCore installer on my Ryzen 3960X and ROG Strix TRX40-E Gaming, but am getting repeatedly stuck at the "PCI Configuration" begin/end sequence in the boot. I have two Nvidia discreet GPU (no iGPU): one supported (GT 710) and the other is not (RTX 3090).

Is the RTX 3090 preventing me from booting? Do I need to disable it in the Device Properties of the config.plist in order to boot the installer? The guide recommends using gfxutil to find the PCI route, but how do you find the route if you cannot boot into MacOS? Is there any way to find the PCI route in Windows or Linux?

submitted by /u/H00NER
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