HP Insight Control Power Management 7.0 User Guide

The HP Power Regulator for Integrity modes are available on supported platforms equipped with
Dual-Core Intel Itanium Processor 9100 series 1.6 GHz dual-core parts.
Understanding HP Power Regulator savings
Server power consumption savings from Power Regulator
The resources saved by HP Power Regulator vary significantly from system to system, based on
each system configuration and utilization.
At higher utilization, Power Regulator saves more power. When the OS is idle, modern Intel and
AMD processors are put into a halt state that consumes minimal power.
The following figure shows Watts consumed and relative workload at various workloads for each
Power Regulator state. The system used in this test is an HP ProLiant DL380G5 with two Intel Xeon
5080 CPUs.
Figure 3 Power and Throughput in each of the HP Power Regulator modes
Analysis of power consumption
In HP Static High Performance Mode, power consumption ranges from 339 W in an idle state to
558 W at 100% utilization. This is an example of power consumption without the benefit of Power
Regulator technology.
The green line shows power consumption in HP Static Low Power Mode ranging from 339 W at
idle to 475 W at 80% utilization and to 497 W at 100% utilization.
The blue line shows power consumption in HP Dynamic Power Savings Power Mode ranging from
339 W in an idle state, to 475 W at 80% utilization, and to 558 W at 100% utilization.
An idle system consumes the same power (339 W) regardless of the Power Regulator mode.
Additionally, the power consumed in HP Dynamic Power Savings Mode matches the power
consumed in HP Static Low Power Mode from idle to 80% utilization because this system is running
in the lower processor p-state from idle to 80% utilization when it is in the Dynamic Mode. In
Dynamic Mode, after 80% utilization, the system shifts into the highest processor p-state and the
power consumption for 90% and 100% workload, and matches the power consumption in HP
Static High Performance Mode.
14 Key concepts