Chapter 6: BIOS
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DCU IP Prefetcher
I
f this item is set to Enable, the IP prefetcher in the DCU (Data Cache Unit) will prefetch IP
addresses to improve network connectivity and system performance. The options are
Enable
and Disable.
LLC Prefetch
If this feature is set to Enable, LLC (hardware cache) prefetching on all threads will be
supported. The options are
Disable
and Enable.
Extended APIC (Extended Advanced Programmable Interrupt Controller)
Based on the Intel Hyper-Threading technology, each logical processor (thread) is assigned
256 APIC IDs (APIDs) in 8-bit bandwidth. When this feature is set to Enable, the APIC ID
will be expanded from 8 bits to 16 bits to provide 512 APIDs to each thread to enhance CPU
performance. The options are
Disable
and Enable.
AES-NI
Select Enable to use the Intel Advanced Encryption Standard (AES) New Instructions (NI) to
ensure data security. The options are
Disable
and Enable.
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. When this feature is set to Custom, the following items will
display.
Power Performance Tuning (Available when "Power Technology" is set to Custom
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_PERF_BIAS_CFG Mode Energy (ENERGY PERFORMANCE BIAS
CONFIGURATION Mode) (Available when supported by the Processor and when
"Power Performance Tuning" is set to BIOS Controls EPB)
This feature allows the user to set the desired processor power use policy for the machine
by prioritizing system performance or energy savings. Selecting Maximum Performance will
maximize performance (to its highest potential); however, this may result in maximum power
consumption. The higher the performance is, the higher the power consumption will be.
Select Max Power Efficient to prioritize power saving; however, system performance may
be substantially impacted. The options are Maximum Performance, Performance,
Balanced
Performance
, Balanced Power, Power, and Max Power Efficient.
