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Rectangular silver server power supply unit with hot-plug handle and ventilation grille

HP

HP 800W Flex Slot Hot-Plug Platinum Low Halogen Power Supply 865414-B21

SKU CH-3GQ8-81YZM

An 800 W hot-pluggable server power module with 96 % efficiency and 100-240 V input

  • Max wattage800 W
  • Power efficiency96
  • Supply voltage100–240 V
  • Product typePower Module
  • Key featuresHot Pluggable
  • 96 % Platinum efficiency lowers running costs
  • Hot-pluggable design enables replacement without server downtime
  • 800 W maximum power supports dense compute loads
  • Flex Slot form factor fits Gen10 ProLiant servers
  • Low-halogen construction meets stricter environmental standards

800W Flex Slot Hot-Plug Power Supply

This 800 watt server power supply uses the HP Flex Slot form factor and supports hot-pluggable, tool-less installation in compatible ProLiant Gen10 Performance Servers. It operates on a 100 to 240 volt input range and carries an 80 PLUS Platinum efficiency rating of 96 percent. The low halogen design meets environmental requirements for modern data centres.

Upgrading from Lower Capacity Flex Slot Units

Replacing a lower wattage Flex Slot module with this 800 watt unit adds headroom for additional processors, memory or accelerator cards without changing the server chassis or cabling. The jump is worth it when the existing power budget limits further configuration growth or when redundancy policies require higher per-module capacity. Hot-plug capability allows the swap without scheduled downtime.

Capacity and Headroom for Dense Compute

An 800 watt module comfortably handles dual processor configurations with large memory populations and multiple storage controllers in a single server node. At 96 percent efficiency, waste heat and operating cost stay low even under sustained load. The unit runs out of headroom when the combined component draw approaches the 800 watt maximum, requiring either a second module for redundancy or a move to a higher capacity power shelf.

How it compares

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

Price $23.99
Cheaper than about 94% of the 3,798 comparable items (median $131.99).
Max wattage 800 W
Higher than about 70% of the 235 comparable items (median 668 W).

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Specifications

Product
Brand nameHP
Product typePower Module
Power
Max wattage800 W
Power efficiency96
Supply voltage100–240 V

Questions about this item

What server form factor does the Flex Slot design fit?

The Flex Slot power supply uses a common electrical and physical design that allows tool-less installation into HP ProLiant Gen10 Performance Servers.

How do you install the power supply and what step is often missed?

Slide the unit into the Flex Slot bay until the latch clicks; the hot-plug feature means the server does not need to be powered down, but forgetting to engage the latch is the common error.

When will the 800W Platinum module need replacement?

With 96 efficiency and hot-plug capability, the module can be swapped without downtime; plan replacement when efficiency drops below 96 or after the rated service life of the host server.

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