Table 10. Operating modes details (continued)
Power/Performance Bias
• Platform
Controlled
• OS Controlled
Power/Performance bias determines how aggressively
the CPU will be power managed and placed into turbo.
With [Platform Controlled], the system controls the
setting. Selecting [OS Controlled] allows the operating
system to control it. Not all OSes support this feature.
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.
Platform Controlled is the default setting.
Platform Controlled Type
• Maximum
Performance
• Efficiency - Favor
Performance
• Minimal Power
[Maximum Performance] allows the most aggressive use
of turbo and power management functions are disabled,
thereby increasing power consumption. [Minimal Power]
disables turbo and maximizes the use of power
management features. 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.
Efficiency - Favor Performance is the default setting.
Page Policy
• Adaptive
• Closed
Adaptive Open Page Policy can improve performance for
applications with a highly localized memory access
pattern; Closed Page Policy can benefit applications that
access memory more randomly.
Closed is the default setting.
MONITOR/MWAIT
• Enable
• Disable
MONITOR/MWAIT instructions are used to engage C-
states. Some operating systems will re-enable C-states
even when they are disabled in setup. To prevent this,
disable MONNITOR/MWAIT, choose [Custom Mode] in
“Operating Mode” and [Disable] in "C-States" located
under “System Setting” submenu.
This item can be changed after the steps as below.
• 1. Operating Modes -> Custom
• 2. C-states -> Disable
Enable is the default setting.
UPI Power Management
N/A Select the desired power management level for the CPU
UPI interface. L1 saves the most power but has longer
latency compared to L0p or Disabled. 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.
Power
Use this menu to configure power scheme options.
30
ThinkSystem Server with Intel Xeon SP (1st, 2nd Gen) UEFI Manual
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