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Grey ATX power supply unit with single fan and multiple cable connectors

Replace Power

Replace Power 550-310 ATX power supply Grey

SKU CH-R7GH-XTMS3

ATX power supply with 20+4 pin, 4-pin 12V, 6-pin and three SATA connectors for HP Pavilion 550-310 desktops

  • Fan configuration1
  • Product colorGrey
  • Product typeATX
  • Product weight1
  • Replacement upgrade PSU for HP Pavilion 550-310
  • 20+4 pin ATX connector powers the motherboard
  • +12V 4-pin connector supplies CPU power
  • Three SATA connectors drive storage devices
  • 6-pin power connector supports graphics cards

Replacement PSU for HP Pavilion 550-310

This ATX power supply is a direct replacement upgrade for the HP Pavilion Desktop 550-310. It fits the original chassis and connector layout without modification. The unit suits owners restoring a failed system or upgrading an ageing unit.

Single fan cooling with standard connectors

One fan manages thermals while the 20+4 pin ATX and +12V 4-pin connectors feed the motherboard. Three SATA power leads and a 6-pin connector support drives and expansion cards. Power delivery follows the original specification for stable operation.

Replaces the factory unit when it fails

The jump is worth it when the original supply has died, become noisy or cannot support added storage and a dedicated graphics card. Builders needing more than three SATA devices or multiple PCIe power cables should look elsewhere.

How it compares

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

Price $59.99
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 install the Replace Power 550-310 ATX power supply and which step is often missed?

Mount the unit in the chassis, connect the 20+4 pin ATX connector to the motherboard, attach the +12V 4-pin CPU power cable, then plug the 6-pin and SATA leads into the graphics card and drives; the step most often missed is seating the 6-pin connector fully until it clicks.

What maintenance or replacement will this power supply need later?

The single internal fan is the only moving part; if it becomes noisy or stops spinning, the entire unit should be replaced rather than serviced.

What limit appears first when this power supply runs under sustained load?

With only one fan providing airflow, thermal headroom is the first constraint during prolonged high-wattage operation.

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