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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 CPU.
However, if power saving considerations outweigh performance, you might want to reduce the frequency of the
CPU 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
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 EnabledDisabled 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 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.
x2APIC Mode
Enables or disables the x2APIC mode. This option is set to Disabled by default.
Dell Controlled
Controls the turbo engagement. Enable this option only when System Profile is set to .
Turbo
Number of Cores
Controls the number of enabled cores in each processor. This option is set to All by default.
per Processor
Processor 64-bit
Specifies if the processors support 64-bit extensions.
Support
Processor Core
Specifies the maximum core frequency of the processor.
Speed
Process Bus Speed Displays the bus speed of the processor.
NOTE:
This option is only available on certain stock keeping units (SKUs) of the processors.
NOTE:
Depending on the number of installed CPUs, there might be up to four processor listings.
Pre-operating system management applications
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