Installed a cheap PCI-Firewire card from Amazon, when it's installed just get black screen. Removed video card and connected display to onboard display port, same result. Updated BIOS to version 1E877113.bin, same result. Went to CSM settings, tried variations of UEFI vs Legacy, same result.
Is there a particular Firewire card that will work? Some other BIOS setting I can try?