Deployment Guide

System BIOS
24 Setting up BIOS on 15th Generation (15G) Dell EMC PowerEdge Servers | 508
1.4 System BIOS—Processor Settings
The Processor Settings page enables you to control the processor-related features.
Note: The default option setting is depicted in boldface. Dell EMC reserves the rights to change the default
properties.
Menu Item
Options
Description
Logical
Processor
• Enabled
• Disabled
Allows you to enable or disable the logical processors
(Hyper-Threading Technology).
CPU
Interconnect
Speed
• Maximum data rate
• 11.2 GT/s
• 10.4 GT/s
• 9.6 GT/s
This setting governs the frequency of the communication
links among the CPUs in the system. Note that standard and
basic bin processors support lower link frequencies than
the advanced parts do.
Maximum Data Rate indicates that the BIOS will run the
communication links at the maximum frequency supported
by the processors. You can also select specific frequencies
that the processors support, which can vary.
For best performance, you must select the Maximum Data
setting. Any reduction in the communication link frequency
will affect the performance of non-local memory accesses
and cache coherency traffic. In addition, it can reduce access
speed to non-local I/O devices from a particular CPU.
However, if power saving considerations outweigh
performance, you may want to reduce the frequency of the
CPU communication links. If you do this, you must localize
memory and I/O accesses to the nearest NUMA node to
minimize the impact to system performance.
Alternate
RTID
(Requestor
Transaction
ID) Setting
• Enabled
• Disabled
Manipulates Requestor Transaction IDs, which are
QuickPath Interconnect (QPI) resources. Generally, should
be left at Disabled, as no workloads have been identified as
benefitting from the manipulation of this feature.
NOTE: Enabling this option almost always results in
negative impacts to overall system performance.
Note: This option is only available on systems with Intel
processors.
Virtualization
Technology
• Enabled
• Disabled
When this option is Enabled, BIOS will enable the processor
virtualization features.
IOMMU
Support
• Enabled
• Disabled
Enable or Disable IOMMU support. Required to create IVRS
ACPI Table.
Note: This option is only available on systems with AMD
processors.