Reference Guide

Option Description
DCU Streamer
Prefetcher
Enables or disables the Data Cache Unit (DCU) streamer prefetcher. This option is set to Enabled by
default.
DCU IP
Prefetcher
Enables or disables the Data Cache Unit (DCU) IP prefetcher. This option is set to Enabled by default.
Sub NUMA
Cluster
Sub NUMA Clustering (SNC) is a feature for breaking up the LLC into disjoint clusters based on address
range, with each cluster bound to a subset of the memory controllers in the system. It improves average
latency to the LLC. Enables or disables the Sub NUMA Cluster. This option is set to Disabled by default.
UPI Prefetch Enables you to get the memory that is read started early on DDR bus. The Ultra Path Interconnect (UPI)
Rx path will spawn the speculative memory that is read to Integrated Memory Controller (iMC) directly.
This option is set to Enabled by default.
LLC Prefetch Enables or disables the LLC Prefetch on all threads. This option is set to Disabled by default.
Dead Line LLC
Alloc
Enables or disables the Dead Line LLC Alloc. This option is set to Enabled by default. You can enable this
option to enter the dead lines in LLC or disable the option to not enter the dead lines in LLC.
Directory AtoS Enables or disables the Directory AtoS. AtoS optimization reduces remote read latencies for repeat read
accesses without intervening writes. This option is set to Disabled by default.
Logical
Processor Idling
Enables you to improve the energy efficiency of a system. It uses the operating system core parking
algorithm and parks some of the logical processors in the system which in turn allows the corresponding
processor cores to transition into a lower power idle state. This option can only be enabled if the
operating system supports it. It is set to Disabled by default.
Configurable TDP Enables you to reconfigure the processor Thermal Design Power (TDP) levels during POST based on the
power and thermal delivery capabilities of the system. TDP verifies the maximum heat the cooling system
is needed to dissipate. This option is set to Nominal by default.
NOTE: This option is only available on certain stock keeping units (SKUs) of the processors.
Configurable TDP Enables you to configure the TDP level. The available options are Nominal, Level 1, and Level 2. This
option is set to Nominal by default.
NOTE: This option is only available on certain stock keeping units (SKUs) of the processors.
SST-
Performance
Profile
Enables you to reconfigure the processor using Speed Select Technology.
x2APIC Mode Enables or disables the x2APIC mode. This option is set to Enabled by default.
Dell Controlled
Turbo
Controls the turbo engagement. Enable this option only when System Profile is set to Disabled.
NOTE: Depending on the number of installed processors, there might be up to two processor listings.
Dell AVX Scaling
Technology
Enables you to configure the Dell AVX scaling technology. This option is set to 0 by default.
AVX ICCP Pre-
Grant
Allows the system to select between different AVX ICCP transition levels offered by Intel. The default
level is 128 Heavy.
X2APIC Mode Displays the X2APIC Mode setting that is read-only and permanently set to enabled.
Number of Cores
per Processor
Controls the number of enabled cores in each processor. This option is set to All by default.
Processor 64-bit
Support
Specifies if the processors support 64-bit extensions.
Processor Core
Speed
Specifies the maximum core frequency of the processor.
Processor Bus
Speed
Displays the bus speed of the processor.
Processor n
NOTE: Depending on the number of processors, there might be up to two processors listed.
The following settings are displayed for each processor that is installed in the system:
10 Pre-operating system management applications