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Grey ATX power supply unit with single fan

Replace Power

Replace Power ATX power supply grey 550 159c

SKU CH-RG37-BTXZW

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

  • ColorGrey
  • TypeATX
  • Fans1
  • Weight1
  • Direct replacement for HP Pavilion 550-159c desktop
  • Standard 20+4 pin ATX connector powers motherboard
  • Dedicated +12 V 4-pin connector feeds CPU
  • Three SATA connectors supply drives and peripherals
  • Includes 6-pin power connector for graphics card

Replacement ATX power supply for HP Pavilion

This 550 watt ATX unit is a direct replacement upgrade for the HP Pavilion Desktop 550-159c. It supplies standard 20+4 pin motherboard power, a 4-pin +12V CPU connector, three SATA connectors and one 6-pin power connector. The grey chassis includes a single cooling fan. It is built for owners of that specific desktop who need a new power supply.

Single fan cooling with standard connectors

The unit uses one fan to move air through the grey housing during normal operation. Power is delivered through a 20+4 pin ATX connector, a 4-pin +12V connector, three SATA connectors and a 6-pin connector. No additional proprietary cables or adapters are included beyond the listed connectors. Acoustic output and thermal behaviour follow the characteristics of a basic single-fan ATX design.

Upgrades the original 550-159c desktop supply

This unit replaces the factory power supply in the HP Pavilion 550-159c when the original unit fails or cannot support added components. The jump is worth it when the system needs reliable 550 watt delivery with the exact connector mix listed above. It is not for builders who need modular cabling, higher wattage headroom, or additional PCIe power connectors beyond the single 6-pin.

Points forts

  • Direct replacement for HP Pavilion 550-159c desktop
  • Standard 20+4 pin ATX connector powers motherboard
  • Dedicated +12 V 4-pin connector feeds CPU
  • Three SATA connectors supply drives and peripherals
  • Includes 6-pin power connector for graphics card

Caractéristiques

BrandReplace Power
ColorGrey
TypeATX
Fans1
Weight1

Questions sur cet article

How do I install the 20+4 pin ATX connector and the +12V 4-pin power connector, and which step do people often get wrong?

Plug the 20+4 pin ATX connector fully into the motherboard socket until it clicks, then seat the +12V 4-pin power connector into the CPU power header. The step people miss is leaving the +12V 4-pin loose because it sits beside the main plug and looks seated when it is not.

What maintenance or replacement will this PSU need later, given its single fan and grey enclosure?

The single internal fan will collect dust over time; clean it with compressed air every 6–12 months to maintain airflow. If the fan becomes noisy or stops spinning, replace the entire unit — no user-serviceable parts inside.

What limit shows up first under sustained load on this 550 W replacement PSU?

The 550 W total output rating is the first hard limit; sustained draws above that will trigger protection shutdown before any individual connector rating is reached.

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