Dell EMC PowerEdge T440 Installation And Service Manual page 45

Option Description
The options available are Maximum data rate, 10.4 GT/s, and 9.6 GT/s. This option is set to Maximum data rate
by default.
Maximum data rate indicates that the BIOS runs 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 should select Maximum data rate. Any reduction in the communication link frequency
affects the performance of non-local memory accesses and cache coherency traffic. In addition, it can slow access
to non-local I/O devices from a particular processor.
However, if power saving considerations outweigh performance, you might want to reduce the frequency of the
processor communication links. If you do this, you should localize memory and I/O accesses to the nearest NUMA
node to minimize the impact to system performance.
Virtualization Enables or disables the virtualization technology for the processor. This option is set to Enabled by default.
Technology
Adjacent Cache Optimizes the system for applications that need high utilization of sequential memory access. This option is set to
Line Prefetch Enabled by default. You can disable this option for applications that need high utilization of random memory
access.
Hardware Enables or disables the hardware prefetcher. This option is set to Enabled by default.
Prefetcher
Software Enables or disables the software prefetcher. This option is set to Enabled by default.
Prefetcher
DCU Streamer Enables or disables the Data Cache Unit (DCU) streamer prefetcher. This option is set to Enabled by default.
Prefetcher
DCU IP Prefetcher Enables or disables the Data Cache Unit (DCU) IP prefetcher. This option is set to Enabled by default.
Sub NUMA Cluster Enables or disables the Sub NUMA Cluster. This option is set to Disabled by default.
UPI Prefetch Enables you to get the memory read started early on DDR bus. The Ultra Path Interconnect (UPI) Rx path will
spawn the speculative memory read to Integrated Memory Controller (iMC) directly. This option is set to Enabled
by default.
Logical Processor Enables you to improve the energy efficiency of a system. It uses the operating system core parking algorithm and
Idling 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 configure the TDP level. The available options are Nominal, Level 1, and Level 2. This option is set
to Nominal by default.
SST-Performance Enables you to reconfigure the processor using Speed Select Technology.
Profile
x2APIC Mode Enables or disables the x2APIC mode. This option is set to Disabled by default.
Number of Cores Controls the number of enabled cores in each processor. This option is set to All by default.
per Processor
Processor Core Specifies the maximum core frequency of the processor.
Speed
Processor Bus Displays the bus speed of the processor.
Speed
Processor n
NOTE: This option is only available on certain stock keeping units (SKUs) of the processors.
NOTE: Depending on the number of processors, there might be up to two processors listed.
Pre-operating system management applications 45