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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%.
Also note that NOT all power supplies, even if they might visually look the same, are universally compatible with every Dell system as form factors, wattage, and cable connections vary. It is important to check the PSU specifications to ensure compatibility with your specific server or storage system.
- :: 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.
Contact Tekmart Africa's support team on 0861 711 712 (RSA) or +2711 027 6793 (international) , if unsure, for your Dell power supplies and our knowledgeable consultants will gladly assist.
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