Mac Fails to Boot, even from recovery USB

[Mittenscore]

Ok, so I've had a stable build for months, decided to multiboot and install a GPU. Went with MSI RX Vega 56 OC, and it works great with Windows. After seeing it stable there, I tried to boot into mac for the first time since GPU installed. This is what I get in verbose. This happens regardless of booting from OS drive or the USB installer. Please help.

 

[Mittenscore]

Never mind; when I had an issue with the PCIe slots not working, i disconnected power and popped out the battery. Bios partially reset without my knowledge. Vt-d re-enabled itself, among some other things.