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most extreme conditions when physical damage might result.
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iLO drivers
Power efficiency
iLO enables you to improve power usage by using High Efficiency Mode(HEM). HEM improves
the power efficiency of the system by placing the secondary power supplies in step-down mode.
When the secondary supplies are in step-down mode, the primary supplies provide all DC power
to the system. The power supplies are more efficient because there are more DC output watts for
each watt of AC input.
When the system draws more than 70% of the maximum power output of the primary supplies,
the secondary supplies return to normal operation (exit step-down mode). When power use
drops below 60% capacity of the primary supplies, the secondary supplies return to step-down
mode. HEM enables you to achieve power consumption equal to the maximum power output of
the primary and secondary power supplies, while maintaining improved efficiency at lower
power-usage levels.
HEM does not affect power redundancy. If the primary supplies fail, the secondary supplies
immediately begin supplying DC power to the system, preventing any downtime.
Use the UEFI System Utilities to configure HEM. You cannot configure these settings through iLO.
For more information, see the Server Maintenance guide.
The configured HEM settings are displayed on the Power Information page.
Managing the server power
The Virtual Power Button section on the Server Power page displays the current power state of
the server, as well as options for remotely controlling server power. System Power indicates the
state of the server power when the page is first opened. The server power state can be ON, OFF,
or Reset. Use the browser refresh feature to view the current server power state. The server is
rarely in the Reset state.
Prerequisites
Virtual Power and Reset privilege
Procedure
1. Click Power & Thermal in the navigation tree.
The page opens with the Server Power tab selected.
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