Chapter 4: BIOS
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Advanced Power Management Confi guration
Power Technology
Select Energy Effi cient to support power-saving mode. Select Custom to customize system
power settings. Select Disabled to disable power-saving settings. The options are Disable,
Energy Effi cient, and Custom.
Power Performance Tuning (Available when "Power Technology" is set to Custom)
Select BIOS to allow the system BIOS to confi gure the Power-Performance Tuning Bias
setting below. The options are BIOS Controls EPB and OS Controls EPB.
Energy Performance BIAS Setting (Available when "Power Performance Tuning" is
set to BIOS Controls EPB)
Use this feature to set the processor power use policy to achieve the desired operation
settings for your machine by prioritizing system performance or energy savings. Select
Maximum Performance to maximize system performance (to its highest potential); however,
this may result in maximum power consumption as energy is needed to fuel the processor
frequency. The higher the performance is, the higher the power consumption will be.
Select Max Power Effi cient to maximize power saving; however, system performance may
be substantially impacted because limited power use decreases the processor frequency.
The options are Maximum Performance, Performance, Balanced Performance, Balanced
Power, Power, and Max Power Effi cient. This feature is internally used by the processor to
control power settings vs performance features including Energy Effi cient P-State/Demotion/
Undemotion etc. The options are Maximum Performance, Performance, Balanced
Performance, Balanced Power, Power, and Max Power Effi cient.
CPU P State Control
SpeedStep (PStates)
EIST (Enhanced Intel SpeedStep Technology) allows the system to automatically adjust
processor voltage and core frequency in an effort to reduce power consumption and heat
dissipation. Please refer to Intel’s website for detailed information. The options are Disable
and Enable.
EIST PSD Function (Available when SpeedStep is set to Enable)
Use this item to confi gure the processor's P-State coordination settings. During a P-State,
the voltage and frequency of the processor will be reduced when it is in operation. This
makes the processor more energy effi cient, resulting in further energy gains. The options
are HW_ALL, SW_ALL and SW-ANY.
Turbo Mode (Available when SpeedStep is set to Enable)
Select Enable for processor cores to run faster than the frequency specifi ed by the
manufacturer. The options are Disable and Enable.
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