Deployment Guide

System BIOS
36 Setting up BIOS on 15th Generation (15G) Dell EMC PowerEdge Servers | 508
be configured via the NIC management utilities
provided with your system.
I/OAT DMA
Engine
• Enabled
• Disabled
Allows you to enable or disable 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. This feature should be enabled
only if the hardware and software support I/OAT.
Note: This option is only available on systems with
Intel processors.
Embedded
Video
Controller
• Enabled
• Disabled
This field enables or disables the use of the Embedded
Video Controller as the primary display.
• If Enabled, the Embedded Video Controller will be
the primary display even if add-in graphics cards
are installed.
• If disabled, an add-in graphics card will be used as
the primary display. The BIOS will output displays
to both the primary add-in video and the
embedded video during POST and pre-boot
environment. The embedded video will then be
disabled right before OS boots.
Note: When there are multiple add-in graphics cards
installed in the system, the one being discovered first
during PCI enumeration will be selected as the primary
video. You might have to re-arrange the cards in the
slots in order to control with card is the primary video
controller.
I/O Snoop
HoldOff
Response
• 256 Cycles
• 512 Cycles
• 1K Cycles
• 2K Cycles
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.
Note: This option is only available on systems with
Intel processors.
Current State
of Embedded
Video
Controller
N/A
This is a read-only field, indicating the current state for
the Embedded Video Controller. 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 Disabled.
Pcie Preferred
IO Bus
• Enabled
• Disabled
In certain platform configurations it is possible to
improve the performance of an endpoint by enabling
Pcie Preferred IO Bus.
To select a particular Pcie Bus, references the PCI bus
(in Hexadecimal) of the add-in card when requesting
Preferred I/O Bus for the device.