Owners Manual

Option Description
USB 3.0 Setting Enables or disables the USB 3.0 support. Enable this option only if your operating system supports USB 3.0. If you
disable this option, devices operate at USB 2.0 speed. USB 3.0 is enabled by default.
User Accessible
USB Ports
Enables or disables the USB ports. Selecting Only Back Ports On disables the front USB ports, selecting All
Ports Off disables all USB ports. The USB keyboard and mouse operate during boot process in certain operating
systems. After the boot process is complete, the USB keyboard and mouse do not work if the ports are disabled.
NOTE: Selecting Only Back Ports On and All Ports Off disables the USB management port and also
restricts access to iDRAC features.
Internal USB Port Enables or disables the internal USB port. This option is set to Enabled by default.
Integrated RAID
Controller
Enables or disables the integrated RAID controller. This option is set to Enabled by default.
Integrated
Network Card 1
Enables or disables the integrated network card.
I/OAT DMA
Engine
Enables or disables the I/OAT option. Enable only if the hardware and software support the feature.
I/O Snoop Holdoff
Response
Selects the number of cycles PCI I/O can withhold snoop requests from the CPU, to allow time to complete its
own write to LLC. This setting can help improve performance on workloads where throughput and latency are
critical.
Embedded Video
Controller
Enables or disables the Embedded Video Controller option. This option is set to Enabled by default.
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 Disabled.
SR-IOV Global
Enable
Enables or disables the BIOS configuration of Single Root I/O Virtualization (SR-IOV) devices. This option is set to
Disabled 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.
Memory Mapped
I/O above 4 GB
Enables or disables the support for PCIe devices that need large amounts of memory. This option is set to
Enabled by default.
Mezzanine Slot
Disablement
The Slot Disablement feature controls the configuration of mezzanine cards installed in the specified slots. Only
mezzanine card slots that are present on your system are available for control.
Related References
Integrated Devices on page 42
Related tasks
Viewing Integrated Devices on page 42
Serial Communication
You can use the Serial Communication screen to view the properties of the serial communication port.
Related References
System BIOS on page 24
Related tasks
Serial Communication details on page 44
Viewing Serial Communication on page 44
Pre-operating system management applications
43