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myVolts AT power supply unit with multiple connectors

myVolts

myVolts Power Supply for HP Pavilion 550-132 550-159c DT PC

SKU CH-D9ZY-ZH8A0

AT-type replacement power supply with 20+4 pin ATX, 4-pin +12V, 6-pin and three SATA connectors

  • TypeAT
  • Replacement upgrade PSU restores reliable power to HP Pavilion 550 models
  • 20+4 pin ATX connector fits standard motherboard power socket
  • +12V 4-pin connector supplies dedicated CPU power
  • Three SATA connectors support multiple storage drives
  • 6-pin power connector provides auxiliary power for expansion cards

Replacement PSU for HP Pavilion 550

This power supply replaces the original unit in HP Pavilion 550-132 and 550-159c desktop PCs. It delivers a standard AT form factor with a 20+4 pin ATX connector and a +12V 4-pin power connector. Builders restoring these specific models will find the correct fit.

Thermals noise and power draw

The unit operates within the thermal envelope expected for the Pavilion 550 chassis. Fan speed is managed by the board to keep noise low during typical office workloads. Power delivery matches the original specification for stable operation.

Connector layout decides compatibility

Three SATA connectors and one 6-pin power connector support drives and expansion cards. A single mini-SATA connector is also present for legacy devices. Verify these exact connections against your current hardware before purchase.

Highlights

  • Replacement upgrade PSU restores reliable power to HP Pavilion 550 models
  • 20+4 pin ATX connector fits standard motherboard power socket
  • +12V 4-pin connector supplies dedicated CPU power
  • Three SATA connectors support multiple storage drives
  • 6-pin power connector provides auxiliary power for expansion cards

Specifications

TypeAT

Questions about this item

How do I install the 20+4 pin ATX connector and what step is often missed?

Align the 20+4 pin ATX connector with the motherboard socket and press firmly until the latch clicks; the step often missed is seating the separate +12V 4-pin power connector near the CPU socket.

What maintenance or replacement will the SATA power connectors need later?

The three SATA power connectors and one mini-SATA connector may need replacement if the plastic housing cracks or pins loosen after repeated drive swaps.

What limit appears first when this AT-type supply runs under sustained load?

The AT-type design lacks modern protection circuits, so overheating or voltage droop on the +12V rail typically appears before the 550 W rating is reached.

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