Chapter 4: UEFI BIOS
75
DCU (Data Cache Unit) IP Prefetcher
If this feature 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 CPU threads will be
supported. The options are
Disable
and Enable.
Extended APIC (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
Enable
and Disable.
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 Controls EPB to allow the system BIOS to configure Power-Performance
Tuning Bias settings listed below. The options are BIOS Controls EPB and
OS Controls
EPB
.
Energy_PERF_BIAS_CFG (Energy Performance BIAS Configuration) Mode (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
Power to enhance power efficiency; however, system performance may be impacted as
a result. The options are Maximum Performance, Performance,
Balanced Performance
,
Balanced Power, and Power.
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