BIOS Performance and Power Tuning Guidelines ... - Dell Community

BIOS Performance and Power Tuning Guidelines for Dell PowerEdge 12th Generation Servers
Figure 17.
Additional Options Exposed by the Custom System Profile
CPU Power Management modes
There are three available selections for CPU Power Management in the System Profile section of BIOS
Setup. Although typically predetermined as part of an overall System Profile selection, these options
can be exposed by choosing a Custom Profile. These three options are described here and are shown
in Figure 17.
1. System DBPM (DAPC) - This is the CPU Power Management mode that utilizes a BIOS-controlled
dynamic frequency manipulation scheme to save power across a variety of utilization levels. The
power saving features of this option are typically are greatest at mid-to-lower utilization levels.
2. Maximum Performance - This specific mode is typically selected for Performance-centric users
who are willing to consume additional power to achieve the highest possible performance for
their computing environment. This mode drives processor frequency to the maximum across all
cores (although idled cores can still be frequency reduced by C-state enforcement through BIOS
or OS mechanisms if enabled). This mode also offers the lowest latency of the CPU Power
Management Mode options, so is always preferred for latency-sensitive environments.
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