Dell PowerEdge R420 Systems Owner's Manual

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Power Supplies

Your system supports the following power supplies:
  • 350 W
  • 550 W

When two identical power supplies are installed, the power supply configuration is redundant (1 + 1). In redundant mode, power is supplied to the system equally from both power supplies to maximize efficiency.

When only one power supply is installed, the power supply configuration is non-redundant (1 + 0). Power is supplied to the system only by the single power supply.

  • NOTE: If two power supplies are used, they must be of the same type and have the same maximum output power.

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