Supermicro X10DRT-B+ User Manual page 69

 CPU P State Control (Available when Power Technology
is set to Custom)
EIST (P-States)
EIST (Enhanced 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.
Turbo Mode (Available when Intel® EIST Technology is enabled)
Select Enable to use the turbo mode to boost system performance. The options
are Enable and Disable.
P-State Coordination
Use this feature to change the P-State (Power-Performance State) coordination
type. P-State is also known as "SpeedStep" for Intel processors. Select HW_ALL
to change the P-State coordination type for all hardware components only. Select
SW_ALL to change the P-State coordination type for all software installed in the
system. Select SW_ANY to change the P-State coordination type for a particular
software program specified by the user in the system. The options are HW_All,
SW_ALL, and SW_ANY.
 CPU HWPM State Control (Available when Power
Technology is set to Custom)
Enable CPU HWPM (Hardware Power Management)
Use this feature to configure CPU hardware power management settings to
enhance energy performance. The options are Disable, HWPM Native Mode,
HWMP OOB Mode.
Enable CPU Autonomous CState
Select Enable for CPU Autonomous C-State support which will allow the CPU to
convert a "HALT" instruction to an "MWait" state to conserve power consumption.
The options are Disable and Enable.
 CPU C State Control (Available when Power Technology
is set to Custom)
Package C State limit
Use this feature to set the limit on the C-State package register. The options are
C0/C1 State, C2 State, C6 (Non Retention) State, and C6 (Retention) State.
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Chapter 4: AMI BIOS