User's Manual

DescriptionName
Whether the BIOS sends the C6 report to the operating system.
When the OS receives the report, it can transition the processor
into the lower C6 power state to decrease energy usage while
maintaining optimal processor performance. This can be one of
the following:
• Disabled—The BIOS does not send the C6 report.
• Enabled—The BIOS sends the C6 report, allowing the
OS to transition the processor to the C6 low power state.
Processor C6 Report
The amount of power available to the server components when
they are idle. This can be one of the following:
• —The server provides all server components with full
power at all times. This option maintains the highest level
of performance and requires the greatest amount of power.
• —When the CPU is idle, the system slightly reduces the
power consumption. This option requires less power than
C0 and allows the server to return quickly to high
performance mode.
• —When the CPU is idle, the system reduces the power
consumption further than with the C1 option. This requires
less power than C1 or C0, but it takes the server slightly
longer to return to high performance mode.
• —When the CPU is idle, the system reduces the power
consumption further than with the C3 option. This option
saves more power than C0, C1, or C3, but there may be
performance issues until the server returns to full power.
• —When the CPU is idle, the server makes a minimal
amount of power available to the components. This option
saves the maximum amount of power but it also requires
the longest time for the server to return to high
performance mode.
• —The server may enter any available C state.
This option is used only if CPU C State is
enabled.
Note
Package C State Limit
Whether the system can enter a power savings mode during idle
periods. This can be one of the following:
• Disabled—The system remains in high performance state
even when idle.
• Enabled—The system can reduce power to system
components such as the DIMMs and CPUs. The amount
of power reduction is specified .
CPU C State
Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
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BIOS Parameters by Server Model
Advanced BIOS Parameters for C460 Servers