Supermicro X11SDD-8C-F User Manual page 55

SpeedStep (Pstates)
Intel SpeedStep Technology allows the system to automatically adjust processor voltage
and core frequency to reduce power consumption and heat dissipation. The options are
Disable and Enable.
EIST PSD Function
This feature allows the user to choose between Hardware and Software to control the
processor's frequency and performance (P-state). In HW_ALL mode, the processor
hardware is responsible for coordinating the P-state, and the OS is responsible for keep-
ing the P-state request up to date on all Logical Processors. In SW_ALL mode, the OS
Power Manager is responsible for coordinating the P-state and must initiate the transition
on all Logical Processors. In SW_ANY mode, the OS Power Manager is responsible for
coordinating the P-state and may initiate the transition on any Logical Processors. The
options are HW_ALL, SW_ALL, and SW_ANY.
Turbo Mode
This feature will enable dynamic control of the processor, allowing it to run above stock
frequency. The options are Disable and Enable.
Hardware PM State Control

Hardware P-States
This setting allows the user to select between OS and hardware-controlled P-states.
Selecting Native Mode allows the OS to choose a P-state. Selecting Out of Band Mode
allows the hardware to autonomously choose a P-state without OS guidance. Selecting
Native Mode with No Legacy Support functions as Native Mode with no support for older
hardware. The options are Disable, Native Mode, Out of Band Mode, and Native Mode
with No Legacy Support.
CPU C State Control

Autonomous Core C-State
Enabling this setting allows the hardware to autonomously choose to enter a C-state
based on power consumption and clock speed. The options are Disable and Enable.
CPU C6 report
Select Enable to allow the BIOS to report the CPU C6 State (ACPI C3) to the operating
system. During the CPU C6 State, the power to all cache is turned off. The options are
Disable, Enable, and Auto.
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Chapter 4: BIOS