Users Guide

Extended Power Performance (EPP)
Extended Power Performance mode enables allocation of 30% additional power in a configuration of six Power Supply Units
(PSUs), to the M1000e chassis, than the redundant power in a Grid Redundancy configuration using 3000 W AC PSUs. However,
the power allocated to servers is automatically reduced in the event of an AC grid failure or a PSU failure, so that the servers are
not powered off. A maximum of 2700W power can be allocated to support chassis with high-end configurations.
By default, the EPP feature is enabled on six 3000W AC power supply configuration. You can view the current setting, disable and
enable this feature using both the Web interface and the Command Line interface.
EPP feature allows power allocations only when:
• Power is configured for Grid redundancy.
• There are six PSUs that are of 3000W AC type.
• System Input Power Cap is higher than 13300W AC (45381 BTU/h).
The power gained using EPP mode is available for increasing the server performance. When compared with a six 2700W AC PSU
configuration, the additional power available on a six 3000W AC PSU configuration with Enhanced Cooling Mode for fans enabled
and active is 723W. When compared with a six 2700W AC PSU configuration, the additional power available in standard fan
configurations mode, is 1023W.
The EPP additional power available is 2700W, which can be used to increase server performance only.
The EPP mode can be enabled only when the following power features are disabled:
• Max Power Conservation Mode (MPCM)
• Dynamic Power Supply engagement (DPSE)
• Server Based Power Management (SBPM)
• Server Performance Over Power Redundancy (SPOPR)
Trying to enable EPP when any of the four features, MPCM, DPSE, SBPM or SPOPR, is enabled results in display of a message.
The message prompts you to disable these four features before Extended Power Performance mode can be enabled. When
Extended Power Performance mode is enabled, any of these other three features, DPSE, SBPM or SPOPR, cannot be enabled. You
are prompted to disable Extended Power Performance feature before any of these three features can be enabled.
Firmware downgrade to version earlier than CMC 4.5 firmware is blocked by the current firmware when the chassis is equipped
with 3000W AC PSUs. The reason for this is that CMC firmware versions earlier than CMC 4.5 do not support 3000W AC PSUs.
Default Power Configurations With Extended Power Performance (EPP)
Default Power Configurations on the Chassis when EPP mode is enabled or disabled:
• On 3000W AC six PSUs configuration with Grid Redundancy policy:
EPP Enabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• Running the commandracadm racresetcfg on 3000W AC PSU configuration, resets the power configurations to the
following values:
EPP Disabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• On 3000W AC with less than six PSUs configuration:
EPP Disabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• On 2700W AC PSU configuration:
EPP Disabled – DPSE Disabled, SPOPR Enabled, MPCM Disabled, SBPM Disabled
• Using racadm racresetcfg on 2700W AC PSU configuration, resets the power configurations to the following values:
EPP Disabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• On a Fresh Air enabled chassis configurations, 3000W PSUs are displayed as 2800W and EPP is not supported.
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