Users Guide

CMC does not require the PSU units to be present in any specic PSU slot positions when No Redundancy is congured.
NOTE: All PSUs in the chassis are Online if DPSE is disabled when in No Redundancy mode. When DPSE is enabled all active
PSUs in the chassis are listed as Online and additional PSUs may be turned to Standby to increase the system's power eciency.
Figure 16. No Redundancy with three PSUs in the chassis
A PSU failure brings other PSUs out of Standby mode, as needed, to support the chassis power allocations. If you have four PSUs, and
require only three, then in the event that one fails, the fourth PSU is brought online. A chassis can have all six PSUs online.
When you enable DPSE, the extra PSUs may be placed in Standby mode to increase eciency and save power. For more information, see
Default Redundancy Conguration.
Extended Power Performance
Extended Power Performance (EPP) mode enables allocation of 30% additional power in a conguration of six Power Supply Units (PSUs),
to the M1000e chassis, than the redundant power in a Grid Redundancy conguration 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 o. A
maximum of 2700W power can be allocated to support chassis with high-end congurations.
By default, the EPP feature is enabled on six 3000W AC power supply conguration. 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 congured 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
conguration, the additional power available on a six 3000W AC PSU conguration with Enhanced Cooling Mode for fans enabled and
active is 723W. When compared with a six 2700W AC PSU conguration, the additional power available in standard fan congurations
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
Managing and Monitoring Power
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