Welp, still no POST when main video adapter set to PCI-E.
I could probably mine anyway by using the onboard VGA but something's definitely fishy there.
ASRock support isn't of much help and vendor hasn't replied in a while.
Don't know what to do.
I never had a problem with over 15x of this mobo. I never changed a bios setting with one either.
Have you tried resetting the mobo to factory defaults?