COMe-bEP7 Module User Guide
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9.6.2.1.
Core C6 (CC6) State
The CPU is designed to support power gating in a C6 state. Power gating reduces
the amount of power consumed by the core to further enhance energy efficiency.
The CPU supports a core C6 mode (CC6).
9.6.3.
Application Power Management (APM)
Application power management (APM) allows the processor to provide maximum
performance while remaining within a specified power-delivery and thermal
envelope. APM hardware dynamically monitors processor activity and generates an
approximation of power consumption. If power consumption exceeds a defined
power limit, a P-state limit is applied by APM hardware to reduce power
consumption. APM ensures that average power consumption over a thermally
significant time period remains at or below the defined power limit.
APM allows P-states to be defined with higher frequencies and voltages than could
be used without APM. These P-states are referred to as boosted P-states.
The APM depends on the effective use of C-states and P-states. Disabling C-states
greatly reduces the performance benefit of APM, as active cores would not be able
to leverage the reduced power of idle cores.
APM can be disabled with the Advanced -> AMD CBS -> NBIO Common Options ->
Core Performance Boost option.
9.7.
SP4/SP4r2 Processor Power and Performance Optimization
The AMD SP4 and SP4r2 CPUs implement enhanced features that continuously
monitor operational conditions (temperature, current, voltage, frequency, and
power) and workload requirements to achieve maximum performance at minimal
power consumption. These features are enabled by enhanced system design and
optimal environment conditions, and work in combination to improve performance
while maintaining baseline performance.
The default mode of operation remains Performance Deterministic, where the CPU
deterministically perform at their lowest common denominator and implies energy
consumed at rated TDP or less – this can be changed to Power Determinism, which
forces the CPU to consume rated TDP and proportionally increases performance.
The Performance configuration can be set with the Advanced -> AMD CBS -> Zen
Common Options -> Determinism Slider option.
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