Symptom:
Intel x520 Option ROM or some Option ROMs in general may not get loaded during the BIOS POST

Conditions:
This problem is normally seen with too many PCIe cards installed or with some cards like Intel X520 which consumes lots of Option ROM memory space. The system has very limited memory space to load legacy Option ROMs which are 16-bit code and should be loaded below 1MB memory space. If the BIOS does not have sufficient memory space to load any Option ROM, it would skip loading that Option ROM, report that in the CIMC SEL, and continue booting.