Dell EMC PowerEdge R640 Installation And Service Manual page 57

Option Description
Turbo Boost Enables or disables the processor to operate in the turbo boost mode. This option is set to Enabled by default.
C1E Enables or disables the processor to switch to a minimum performance state when it is idle. This option is set to
Enabled by default.
C States Enables or disables the processor to operate in all available power states. This option is set to Enabled by default.
Write Data CRC Enables or disables the Write Data CRC. This option is set to Enabled by default.
Memory Patrol Sets the memory patrol scrub frequency. This option is set to Standard by default.
Scrub
Memory Refresh Sets the memory refresh rate to either 1x or 2x. This option is set to 1x by default.
Rate
Uncore Frequency Enables you to select the Processor Uncore Frequency option.
Dynamic mode enables the processor to optimize power resources across the cores and uncore during runtime.
The optimization of the uncore frequency to either save power or optimize performance is influenced by the
setting of the Energy Efficiency Policy option.
Energy Efficient Enables you to select the Energy Efficient Policy option.
Policy
The CPU uses the setting to manipulate the internal behavior of the processor and determines whether to target
higher performance or better power savings.
Number of Turbo
Boot Enabled Cores
for Processor 1
Controls the number of turbo boost enabled cores for Processor 1. The maximum number of cores is enabled by
default.
Monitor/Mwait Enables the Monitor/Mwait instructions in the processor. This option is set to Enabled for all system profiles,
except Custom by default.
CPU Interconnect Enables or disables the CPU Interconnect Bus Link Power Management. This option is set to Enabled by default.
Bus Link Power
Management
PCI ASPM L1 Link Enables or disables the PCI ASPM L1 Link Power Management. This option is set to Enabled by default.
Power
Management
NOTE: If there are two processors installed in the system, you will see an entry for Number of Turbo
Boost Enabled Cores for Processor 2.
NOTE: This option can be disabled only if the C States option in the Custom mode is set to disabled.
NOTE: When C States is set to Enabled in the Custom mode, changing the Monitor/Mwait setting does
not impact the system power or performance.
Dell EMC PowerEdge R640 Installation and Service Manual
Pre-operating system management applications
57