Chapter 6 UEFI BIOS
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Advanced Power Management Configuration
Power Technology
Select Energy Efficient to support power-saving mode. Select Custom to customize system
power settings. Select Disabled to disable power-saving settings. The options are Disable,
Energy Efficient
, and Custom.
The following items are configurable if
Custom
is selected above.
Power Performance Tuning
Select BIOS to allow the system BIOS to configure 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); how-
ever, 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 consump-
tion will be. Select Max Power Efficient 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 Efficient.
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. Refer to the Intel website for detailed information. The options are Disable
and
Enable
.
The following two items are configurable if
SpeedStep
is enabled above.
EIST PSD Function
Use this item to configure 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 efficient, resulting in further energy gains. The options
are
HW_ALL
, SW_ALL and SW-ANY.