X9DRi-LN4F+ Rev 1.10 and booting from USB

I’m trying to get my new build up and running, and it seems like the motherboard is having issues booting directly into Unraid from USB.

X9DRi-LN4F+ Rev 1.10 motherboard USB is in UEFI mode

Any ideas?

Make sure you set the BIOS to boot from the USB in UEFI mode; the same drive will show up in two different places in the boot options, once for MBR boot and once for EFI boot.