Question I am having problems booting  X8DTN+ motherboard from a USB . I have a PCIe raid card and a PCIe HBA card on the board. If both cards are installed, it will not boot to USB. However if I remove one of the cards (doesn’t matter which) it will boot to USB. I have tried using different slots with the same result. Answer Please disable the OpROM for the card that does not have the OS. Say HBA is used for data drive, then disable the OpROM for that PCI-e slot. Disable under BIOS >> Advance >> PCI/PnP Configuration >> Slot# PCI-E Option ROM >> disable the slot which HBA is installed in. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) G U 9 X FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 21114 N/A 07/10/15     Print Answer