Dell Power Supplies
Dell server and storage power supplies. What to consider.
Power supplies are optimized to run with high-line (230V) input voltage. While PowerEdge power supplies support auto-ranging, low-line (115V) operation can reduce overall efficiency by about 2%.
- :: When you order redundant power supply configurations, overall system power efficiency is reduced by power supplies sharing the load and operating at a lower point on their efficiency curves.
- :: Rack and tower PowerEdge servers support Power Supply Hot Spare, which puts the redundant power supply in a “sleep state” to remove the efficiency impact of redundant power supply configurations.
- :: Hot Spare is enabled by default, and you can select which of the power supplies will be the hot spare primary.
- :: This should be the power supply on the most cost-effective and power-efficient grid, as the primary power supply may see the majority of the load.
- :: Rack and tower PowerEdge servers also support the ability to disable power factor correction (PFC) to reduce power consumption when the system is in standby (S5 state).
- :: DAPC is a Dell proprietary implementation of dynamic processor power management that provides superior performance-per-watt compared to OS-based dynamic power management.
- :: Unlike unique OS implementations, DAPC provides consistent results regardless of the operating system and provides dynamic processor power management even if it is not supported by the OS or hypervisor.
- DAPC System profile is configured in the factory when you select “Power Saving Dell Active Power Controller” in the ordering tool.
This is the recommended profile for performance-per-watt.
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