Reference Guide

Option Description
Embedded Video
Controller
Enables or disables the use of Embedded Video Controller as the primary display. When set to Enabled,
the Embedded Video Controller is used as the primary display even if add-in graphic cards are installed.
When set to Disabled, an add-in graphics card is used as the primary display. BIOS will output displays to
both the primary add-in video and the embedded video during POST and pre-boot environment. The
embedded video is disabled before the operating system boots. This option is set to Enabled by default.
NOTE: When there are multiple add-in graphic cards installed in the system, the first card discovered
during PCI enumeration is selected as the primary video. You might have to re-arrange the cards in
the slots in order to control which card is the primary video.
Current State of
Embedded Video
Controller
Displays the current state of the embedded video controller. The Current State of Embedded Video
Controller option is a read-only field. If the Embedded Video Controller is the only display capability in the
system (that is, no add-in graphics card is installed), then the Embedded Video Controller is automatically
used as the primary display even if the Embedded Video Controller setting is set to Enabled.
SR-IOV Global
Enable
Enables or disables the BIOS configuration of Single Root I/O Virtualization (SR-IOV) devices. This option
is set to Enabled by default.
OS Watchdog
Timer
If your system stops responding, this watchdog timer aids in the recovery of your operating system. When
this option is set to Enabled, the operating system initializes the timer. When this option is set to
Disabled (the default), the timer does not have any effect on the system.
Empty Slot
Unhide
Enables or disables the root ports of all the empty slots that are accessible to the BIOS and OS. This
option is set to Disabled by default.
Memory Mapped
I/O above 4 GB
Enables or disables the support for the PCIe devices that need large amounts of memory. Enable this
option only for 64-bit operating systems. This option is set to Enabled by default.
Memory Mapped
I/O Base
When set to 12 TB, the system maps MMIO base to 12 TB. MMIO base default is 56 TB. The default value
must not be changed, unless addressing a known issue. Enable this feature for an OS that requires 44 bit
PCIe addressing.
Slot Disablement Enables or disables the available PCIe slots on your system. The slot disablement feature controls the
configuration of the PCIe cards installed in the specified slot. Slots must be disabled only when the
installed peripheral card prevents booting into the operating system or causes delays in system startup. If
the slot is disabled, both the Option ROM and UEFI drivers are disabled. Only slots that are present on the
system are available for control.
Table 3. Slot Disablement
Option Description
Slot 1
Enables or disables or only the boot driver is
disabled for the PCIe slot 1. This option is set to
Enabled by default.
Slot 3
Enables or disables or only the boot driver is
disabled for the PCIe slot 3. This option is set to
Enabled by default.
Slot 4
Enables or disables or only the boot driver is
disabled for the PCIe slot 4. This option is set to
Enabled by default.
Slot 5
Enables or disables or only the boot driver is
disabled for the PCIe slot 5. This option is set to
Enabled by default.
16 Pre-operating system management applications