Installing power supplies

The server supports 900-watt ac power supplies, 1400-watt ac power supplies, and 750-watt -48 volt dc power supplies. For more information about the supported power supplies and instructions on how to install the power supplies, see Installing a 1400-watt or 900-watt hot-swap power supply and Installing a 750-watt -48 volt to -60 volt dc power supply.

The following list describes the types of power supplies that the server supports and other information that you must consider when you install power supplies:

• The server default power supply configuration setting, when shipped from the factory, is non-redundant mode with throttling enabled for both ac and dc power supply models. If you want to change the mode to redundancy mode, you must use IMM2 web interface to set and change the power supply Power Policy and System Power Configurations options settings. You can set and change the policies and configurations using the IMM2 web interface, CIM, or the Advanced Settings Utility. You cannot set or change the Power Policy or System Power Configurations setting using the UEFI Setup utility. For more information, see Setting power supply power policy and system power configurations.
• If you are using two power input feeds, connect power supplies 1 and 3 to input feed A and power supplies 2 and 4 to input feed B.
• You cannot mix ac and dc power supplies in the same server.
• The power supply bays are divided into two power domains. Power supply bays 1 and 3 are in power domain A and power supply bays 2 and 4 are in power domain B.
• You must use a power-supply spacer when installing the 750-watt -48 volt dc power supplies and the 900-watt power supplies.
• The following table lists the population sequence for the supported power supply configurations. These configurations apply for each 4-socket node of the 8-socket server.

  Table 1. Population sequence for the supported power supply configurations for each 4-socket node.

  Supported power supply configurations population sequence for each 4-socket node

  Power supply configuration	Notes:
  1 power supply	The power supply should be installed in bay 3. This configuration does not support power supply redundancy. A power supply filler must be installed in bays 1, 2, and 4.
  2 power supplies	The power supplies should be installed in bays 2 and 3 with each supply on separate power feeds for feed redundancy. Both power supplies must be the same type (that is, the same wattage, ac power supplies, or dc power supplies). A power supply filler must be installed in bays 1 and 4.
  4 power supplies	Power supplies 1, 2, 3, and 4 must be the same input type (that is, all ac power supplies or all dc power supplies).

• Four 750-watt -48 volt dc power supplies is the only 750-watt -48 volt dc power supply configuration that the server supports (for each 4-socket node).
• The following table lists the supported ac power supply configurations at both 220 V ac and 110 V ac. These configurations apply for each 4-socket node of the 8-socket server:

  Table 2. Supported ac power supply configurations at both 220 V ac and 110 V ac for each 4-socket node.

  Supported ac power supply configurations at both 220 V ac and 110 V ac for each 4-socket node

  Number of power supplies	Power supply wattage
  One	900-watt
  One	1400-watt
  Two	900-watt
  Two	1400-watt
  Four	Two 900-watt and two 1400-watt
  Four	900-watt
  Four	1400-watt

• If you mix 900-watt and 1400-watt power supplies in the server, the power supplies must be installed as listed in the table below. These configurations apply for each 4-socket node of the 8-socket server.

  Table 3. Support configurations when mixing 900-watt and 1400-watt ac power supplies for each 4-socket node.

  Two-column table that lists the population sequence when mixing 900-watt and 1400-watt ac power supplies in a four-power supply configuration (per 4-socket node)

  Note

  If you are using two power input feeds, connect power supplies 1 and 3 to input feed A and power supplies 2 and 4 to input feed B.

  Power supply bay number	Power supply wattage
  Bays 1 and 4	900-watt
  Bays 2 and 3	1400-watt
  OR
  Bays 1 and 4	1400-watt
  Bays 2 and 3	900-watt