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Grey ATX power supply unit with single fan

Replace Power

Replace Power 550-101a ATX power supply

SKU CH-3B7S-CGZ31

ATX power supply with 20+4 pin, +12V 4-pin, 6-pin and three SATA connectors for HP Pavilion Desktop 550-101a

  • Fan configuration1
  • Product colorGrey
  • Product typeATX
  • Product weight1
  • Reliable power for HP Pavilion 550-101a DT PC
  • Standard 20+4 pin ATX connector fits motherboard
  • Dedicated +12V 4-pin connector for CPU power
  • Three SATA connectors support multiple drives
  • Includes 6-pin connector for graphics card power

Replacement PSU for HP Pavilion 550-101a

This Replace Power unit is built as a direct replacement for the HP Pavilion Desktop 550-101a. It follows the standard ATX form factor and uses a single cooling fan in a grey enclosure. The power supply is new and intended for owners restoring or upgrading that specific desktop model.

Fits the 550-101a; not for other builds

The connector layout matches the original HP configuration with a 20+4 pin ATX connector, a +12V 4-pin power connector, three SATA connectors and one 6-pin power connector. Builders working on different motherboards or needing additional PCIe power cables should look at other units.

Connector set determines compatibility

The included 20+4 pin ATX, +12V 4-pin, 6-pin and three SATA connectors define whether this unit can power your board and drives. Verify your motherboard and device requirements against this exact list before purchasing.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $60.99
Cheaper than about 85% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Brand nameReplace Power
Product colorGrey
Product typeATX
More details
Fan configuration1

Questions about this item

How do I confirm the 550 W unit is running correctly after installation?

The PSU fan should spin and the system must power on without unexpected shutdowns.

What connectors come with this Replace Power ATX supply and what might I still need?

Includes one 20+4 pin ATX, one 4-pin +12 V, one 6-pin and three SATA power leads; any extra SATA or PCIe cables are separate.

Which version fits the HP Pavilion Desktop 550-101a?

This single 550 W ATX model is built as a direct replacement for the 550-101a chassis.

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