Table 64. Integrated Devices details(continued)
Option Description
I/OAT DMA Engine Enables or disables the I/O Acceleration Technology (I/OAT) option. I/OAT is
a set of DMA features designed to accelerate network traffic and lower CPU
utilization. Enable only if the hardware and software support the feature. This
option is set to Disabled by default.
Embedded Video Controller Enables or disables the use of Embedded Video Controller as the primary
display. When set to Enabled, the Embedded Video Controller will be 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 preboot environment. The embedded video will then be
disabled right 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 rearrange the cards in the slots in
order to control which card is the primary video.
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.
The option available is 2K Cycles 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.
Empty Slot Unhide Enables or disables the root ports of all the empty slots that are accessible to
the BIOS and operating system. This option is set to Disabled by default.
Slot Bifurcation Auto Discovery Bifurcation Settings allows Platform Default Bifurcation,
Auto Discovery of Bifurcation, and Manual bifurcation Control.
This option is set to Platform Default Bifurcation by default. The slot
bifurcation field is accessible when set to Manual bifurcation Control and
is grayed out when set to Platform Default Bifurcation and Auto Discovery
of Bifurcation.
NOTE: The slot bifurcation supports on PCIe slot only, does not support
slot type from Paddle card to Riser and Slimline connector to Riser.
Serial Communication
To view the Serial Communication screen, power on the system, press F2, and click System Setup Main Menu > System
BIOS > Serial Communication.
NOTE: The Serial Communication option uses the Micro USB Type B port connection on the XR5610 system.
60 Pre-operating system management applications
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