HP ROM-Based Setup Utility - Manual (Page 74)

PCI Device Enable/Disable menu
These options enable and disable embedded and add-in devices. Disabling devices reallocates
the resources (memory, I/O, and, in some cases, option ROM space and power) that would
normally be allocated to the device.
By default, all devices are Enabled.
NOTE: Only IRQs that are modified in RBSU retain the change during the next reboot. IRQs on
PCI devices that have not been modified are subject to change during reboot.
74 RBSU menu-driven interface, version 3.xx or later (G6, G7, and Gen8 servers)