Lenovo ThinkSystem SD530 Manual page 30

Table 9. Operating modes details (continued)
Memory Power Management
CPU P-state Control
C1 Enhanced Mode
UPI Link Frequency
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ThinkSystem Server with Intel Xeon SP (1st, 2nd Gen) UEFI Manual
[Disabled] provides maximum performance but minimum
• Automatic
power savings. [Automatic] is suitable for most
• Disabled
applications. When a preset mode is selected, the low-
level settings are not changeable and will be grayed out. If
user would like to change the settings, choose [Custom
Mode] in "Operating Mode" located under "System
Setting" submenu.
Disabled is the default setting.
Select the method to control CPU P-states (performance
• None
states). [None] disables all P-states and the CPUs run at
• Legacy
either their rated frequency or in turbo mode (if turbo is
enabled). When [Legacy] is selected, the CPU P-states
• Autonomous
will be presented to the operating system (OS) and the OS
• Cooperative
power management (OSPM) will directly control which P-
state is selected. With [Autonomous], the P-states are
controlled fully by system hardware. No P-state support is
required in the OS or VM. [Cooperative] is a combination
of Legacy and Autonomous. The P-states are still
controlled in hardware but the OS can provide hints to the
hardware for P-state limits and the desired setting. When
a preset mode is selected, the low-level settings are not
changeable and will be grayed out. If user would like to
change the settings, please choose [Custom Mode] in
"Operating Mode" located under "System Setting"
submenu.
Autonomous is the default setting.
Enabling C1E (C1 enhanced) state can save power by
• Enable
halting CPU cores that are idle. An operating system that
• Disable
supports C1E state must be installed to take advantage of
this feature. Changing this setting takes effect after the
next reboot. When a preset mode is selected, the low-
level settings are not changeable and will be grayed out. If
user would like to change the settings, please choose
[Custom Mode] in "Operating Mode" and [Legacy]/
[Disable] in "C-States" located under "System Setting"
submenu.
C1E is changeable only when C-state is not
Autonomous.
Enable is the default setting.
Select the desired CPU UPI link frequency. [Maximum
• Minimal Power
Performance] mode maximizes performance. [Balanced]
• Balanced
mode offers a balance between performance and power.
[Minimal Power] maximizes power savings. When a preset
• Max
mode is selected, the low-level settings are not
Performance
changeable and will be grayed out. If user would like to
change the settings, choose [Custom Mode] in
"Operating Mode" located under "System Setting"
submenu.
Max Performance is the default setting.