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High Efficiency Mode
High Efficiency Mode improves the power efficiency of the server by placing the secondary
power supplies in standby mode. When the secondary power supplies are in standby mode,
primary power provides all DC power to the system. The power supplies are more efficient (more
DC output watts for each watt of AC input) at higher output levels, and the overall power
efficiency improves.
High Efficiency Mode does not affect power redundancy. If the primary power supplies fail, the
secondary power supplies immediately begin supplying DC power to the system, preventing any
downtime. You can configure redundant power supply modes only through the UEFI System
Utilities. You cannot modify these settings through the iLO firmware.
If High Efficiency Mode is configured to use an unsupported mode, you might experience
decreased power supply efficiency.
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