Table 12. Processors details
Item
Options
Description
Processor Details
N/A Displays summary of the installed processors.
Turbo Mode
• Enable
• Disable
Enabling turbo mode can boost the overall CPU
performance when all CPU cores are not being fully
utilized. A CPU core can run above its rated frequency for
a short period of time
when it is in turbo mode. When a preset mode is selected,
the low-level settings are not changeable and will be
grayed out. If user would like to change the settings,
please choose [Custom Mode] in “Operating Mode”
located under “System Setting” submenu.
Enable is the default setting.
Note: If CPU doesn’t support the feature, it won’t show.
CPU P-state Control
• None
• Legacy
• Autonomous
• Cooperative
Select to control CPU P-states (performance states).
[None] disables all P-states and the CPUs run at either
their rated frequency or in turbo mode (if turbo is
enabled). When [Legacy] is selected, the CPU P-states
will be presented to the operating system (OS) and the OS
power management (OSPM) will directly control which P-
state is selected. With [Autonomous], the P-states are
controlled fully by system hardware. No P-state support is
required in the OS or VM. [Cooperative] is a combination
of Legacy and Autonomous. The P-states are still
controlled in hardware but the OS can provide hints to the
hardware for P-state limits and the desired setting. When
a preset mode is selected, the low-level settings are not
changeable and will be grayed out. If user would like to
change the settings, please choose [Custom Mode] in
“Operating Mode” located under “System Setting”
submenu.
Autonomous is the default setting.
C-States
• Legacy
• Autonomous
• Disable
C-states reduce CPU idle power. When [Legacy] is
selected, the operating system initiates the C-state
transitions. For E5/E7 CPUs, ACPI C1/C2/C3 map to Intel
C1/C3/C6. For 6500/7500 CPUs, ACPI C1/C3 map to
Intel C1/C3 (ACPI C2 is not available). Some OS SW may
defeat the ACPI mapping (e.g. intel_idle driver). When
[Autonomous] is selected, HALT and C1 request get
converted to C6 requests in hardware. When a preset
mode is selected, the low-level settings are not
changeable and will be grayed out. If user would like to
change the settings, please choose [Custom Mode] in
"Operating Mode" located under "System Setting"
submenu.
Autonomous is the default setting.
Chapter 3. System configuration and boot management 33
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