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Silver rectangular server power supply module with side handle and ventilation grille

HPE

HPE 720479-B21 800W Flex Slot Platinum Hot Plug server power supply

SKU CH-P8Y5-6ZEMA MPN 720479-B21

Refurbished 800W Flex Slot Platinum hot-plug power supply delivers up to 94% efficiency in a 25% smaller form factor for ProLiant DL300 Gen9 servers

  • TypePower Module
  • Up to 94% efficiency cuts energy waste with 80Plus Platinum certification
  • 25% smaller form factor frees space for additional server options
  • Tool-less hot-plug design speeds maintenance and reduces downtime
  • Supported across ProLiant DL300 Gen9 family simplifies spare-part management
  • 800W output delivers reliable power for demanding workloads

800W Flex Slot Platinum supply

The HPE 720479-B21 is an 800W hot-plug power module built for ProLiant DL300 Gen9 servers. Its Flex Slot form factor suits data-centre racks where space and service speed matter.

25% smaller form factor

The unit is 25% smaller than the previous generation, leaving more room for additional server options. Tool-less hot-plug access allows replacement without downtime, and Platinum efficiency cuts waste heat across the rack.

94% efficiency headroom

Delivers up to 94% efficiency at 800W, lowering overall power draw. Not suited for configurations that exceed this output or for servers outside the supported ProLiant DL300 Gen9 family.

Highlights

  • Up to 94% efficiency cuts energy waste with 80Plus Platinum certification
  • 25% smaller form factor frees space for additional server options
  • Tool-less hot-plug design speeds maintenance and reduces downtime
  • Supported across ProLiant DL300 Gen9 family simplifies spare-part management
  • 800W output delivers reliable power for demanding workloads

Specifications

BrandHPE
TypePower Module
Shipping weight1.81 kg
Package size376 × 191 × 147 mm

Questions about this item

Will the hot-plug mechanism or internal fan need replacement during the unit's service life?

The power supply uses a tool-less hot-plug design for quick removal, and the internal cooling fan is the only moving part that may require attention after extended operation.

What thermal limit is reached first when the 800W module runs at full load continuously?

At up to 94 percent efficiency the unit still dissipates waste heat, so the internal temperature threshold triggers fan-speed increases before any output derating occurs.

How much acoustic noise and heat does the supply produce during all-day operation in a ProLiant DL300 Gen9 chassis?

The Platinum-rated 800W module runs cooler than lower-rated units, and its variable-speed fan keeps noise low until sustained high load raises chassis inlet temperatures.

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