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Rectangular silver metal server power supply module with rear connector and side handle

HP

HP 820792-B21 900W 80 Plus Gold server power supply

SKU CH-3JFB-ZCZV0 MPN 820792-B21

A 900W redundant server power module with 80 Plus Gold efficiency up to 92% and hot-plug AC input for ProLiant Gen9 Essential servers

  • Supply voltage120 V AC 230 V AC
  • Product typePower Module
  • Product weight5.4
  • Key features80 Plus Gold
  • 900 W output powers demanding server workloads
  • 80 Plus Gold efficiency reduces energy costs
  • Hot-plug redundant design protects against power loss
  • Wide 110-240 V AC input suits global deployments
  • 4 kg module enables fast tool-less replacement

HP 900W 80 Plus Gold server power module

This 900W redundant power module is built for HPE ProLiant Gen9 Essential servers needing hot-plug capability. It accepts 110-240V AC input and delivers 80 Plus Gold efficiency up to 92%. The unit weighs 5.4 units and fits into a single power supply bay with a power backplane.

Replaces non-redundant or lower-wattage supplies

The 550W Silver-rated option reaches only 89% efficiency and lacks redundancy. Upgrading to this 900W Gold module adds fault tolerance and cuts operating costs when your server runs continuous workloads. The jump is worth it when uptime matters more than the entry-level price point.

Verify Gen9 Essential compatibility and bay layout

Confirm your server supports the redundant AC power input module with power backplane configuration. Only ProLiant Gen9 Essential models with a single power supply bay can use this kit for redundancy. Check the manufacturer part number 820792-B21 against your system maintenance guide before ordering.

How it compares

Measured against everything we stock in Server & Hot-Plug PSUs, at today’s prices. Recalculated every night.

Price $391.99
Pricier than about 90% of the 3,798 comparable items (median $131.99).

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Specifications

Product
Brand nameHewlett-Packard
Product line80 Plus
Model name820792-B21
Product typePower Module
Power
Supply voltage120 V AC 230 V AC
Size & build
Shipping weight2.72 kg
Package size465 × 259 × 84 mm

Questions about this item

What server chassis slot width and depth does the 820792-B21 power module occupy?

The 820792-B21 is a redundant plug-in module designed for a single ProLiant Gen9 Essential power supply bay with a power backplane.

What is the correct hot-plug installation sequence for this 900 W AC input module?

Insert the module firmly until the latch clicks, then connect the AC cord; the common error is seating the cord before the module locks.

Which replaceable component inside the 820792-B21 will need attention after extended 24/7 operation?

The internal cooling fan is the primary wear item; monitor server thermal alerts and replace the fan module when noise or speed warnings appear.

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