User Accessible USB Ports
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Configures the user accessible USB ports. Select
Only Back Ports On to disable the front USB ports. Select
All Ports Off to disable all front and back USB ports. Select
All Ports Off (Dynamic) to disable all front and back USB ports during POST. You can enable or disable the front ports dynamically by authorized user without resetting the system. By default, this option is set to
All Ports On.
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The USB keyboard and mouse still function in certain USB ports during the boot process, depending on the selection. After the boot process is complete, the USB ports will be enabled or disabled as per the setting.
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iDRAC Direct USB Port
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iDRAC exclusively manages the iDRAC Direct USB port with no host visibility. You can set this option to
ON or
OFF. When set to
OFF, iDRAC does not detect any USB devices that are installed in this managed port. By default, this option is set to
On.
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Integrated Network Card1
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Enables or disables the integrated network card. When this option is set to
Disabled, the card is not available to the operating system.
NOTE: If set to Disabled (operating system), the Integrated NICs might still be available for shared network access by iDRAC.
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Embedded NIC1 and NIC2
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Enables or disables the operating system interface of the Embedded NIC1 and NIC2 controller. If set to
Disabled (OS), the NIC may still be available for shared network access by the embedded management controller.
Configure the
Embedded NIC1 and NIC2 option by using the NIC management utilities of the system. By default, this option is set to
Enabled.
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I/OAT DMA Engine
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Enables or disables the I/O Acceleration Technology (I/OAT) option. I/OAT are DMA features that accelerate network traffic and lower CPU utilization. Enable this option only if the hardware and software support the feature. By default, this option is set to
Disabled.
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Embedded Video Controller
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Enables or disables the use of Embedded Video Controller as the primary display.
- When set to
Enabled, the Embedded Video Controller is 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. The BIOS output displays to both the primary add-in video and the embedded video during POST and preboot environment. The embedded video is disabled right before the operating system boots.
By default, this option is set to
Enabled.
NOTE:When multiple add-in graphics cards are installed in the system, the first card that is discovered during the PCI enumeration is set as the primary video. To control which card is recognized as is the primary video card, rearrange the cards in the slots.
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I/O Snoop HoldOff Response
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Selects the number of cycles the 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. The options available are:
- 256 Cycles
- 512 Cycles
- 1K Cycles
- 2K Cycles
- 4K Cycles
- 8K Cycles
- 16K Cycles
- 32K Cycles
- 64K Cycles
- 128K Cycles
By default, this option is set to
2K Cycles.
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Current State of Embedded Video Controller
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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 option in the system and no other add-in graphic cards are installed, the Embedded Video Controller is automatically used as the primary display even if the
Embedded Video Controller setting is set to
Disabled.
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SR-IOV Global Enable
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Enables or disables the BIOS configuration of Single Root I/O Virtualization (SR-IOV) devices. By default, this option is set to
Disabled.
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OS Watchdog Timer
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If your system stops responding, the 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 affect the system.
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Empty Slot Unhide
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Enables or disables the root ports of all the empty slots that are accessible to the BIOS and operating system. By default, this option is set to
Disabled.
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Slot Disablement
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Enables or disables the available PCIe slots on your system. The slot disablement feature controls the configuration of the PCIe cards that are 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. When this option is set to boot driver disabled, both the
Option ROM and
UEFI driver from the slot do not run during POST. The system does not boot from the card, and the preboot services are not available. However, the card is available to the operating system.
Slot n: Enables or disables or only the boot driver is disabled for the PCIe slot n. By default, this option is set to
Enabled.
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Slot Bifurcation
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Auto Discovery Bifurcation Settings allows
Platform Default Bifurcation,
Auto Discovery of Bifurcation, and
Manual bifurcation Control.
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By default, this option is set to
Platform Default Bifurcation. The slot bifurcation field is accessible when set to
Manual bifurcation Control and is unavailable when set to
Platform Default Bifurcation and
Auto Discovery of Bifurcation.
NOTE: The slot bifurcation supports on PCIe slot only, does not support slot types from Paddle card to Riser and Slimline connector to Riser.
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