https://bugzilla.kernel.org/show_bug.cgi?id=208573
--- Comment #4 from Thomas Langkamp (thomas.langkamp@medicalschool-hamburg.de) --- Maybe it has something to do with my X470 Board not being PCI-E 4.0? I switched to a better PSU today, but that did not help either. Both screens completely black until I pull one cable and reboot.