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Grey ATX power supply unit with single fan

Replace Power

Replace Power RPSU-C99-8 420W ATX power supply

SKU CH-54D6-RMBZ9 MPN RPSU-C99-8

A 420W ATX power supply with an 80mm fan, switchable 110V and 220V input, and connectors including 20+4 ATX, ATX12V, SATA, peripheral and floppy

  • ColorGrey
  • TypeATX
  • Fans1
  • Weight0.1
  • 420W output powers demanding desktop builds
  • Switchable 110V and 220V input suits global mains
  • Single 80mm fan cools the unit quietly
  • One 15-inch SATA connector drives storage devices
  • 20+4 pin ATX and ATX12V connectors fit modern motherboards

420W ATX replacement unit

This 420W ATX power supply replaces faulty or ageing units in HP desktops and other compatible systems. It delivers the rated wattage through a standard ATX form factor with a single 80mm fan for cooling. The grey chassis fits directly into the same mounting points as the original equipment.

Upgrade from failed OEM units

The unit serves as a direct swap for HP part numbers 376649-001 405479-001 405872-001 410507-002 and matches the original 420W rating. The jump is worth it when the existing supply has failed, shows voltage instability or cannot sustain load under normal operation. Input voltage is switchable between 110V and 220V for regional compatibility.

Fits standard ATX builds with SATA

The supply provides one SATA connector, a 20+4 pin ATX connector, a 12V ATX connector, two large peripheral connectors, two short peripheral connectors and one floppy connector. Cable lengths of 14-inch and 15-inch reach typical drive bays and motherboard headers. Builders needing additional SATA devices or multiple 12V CPU connectors should verify requirements before purchase.

Highlights

  • 420W output powers demanding desktop builds
  • Switchable 110V and 220V input suits global mains
  • Single 80mm fan cools the unit quietly
  • One 15-inch SATA connector drives storage devices
  • 20+4 pin ATX and ATX12V connectors fit modern motherboards

Specifications

BrandReplace Power
ModelRPSU-C99-8
ColorGrey
TypeATX
Fans1
Weight0.1

Questions about this item

What clearance does the 80 mm fan need inside the case?

The unit uses a single 80 mm fan; allow enough depth behind the rear panel for the fan housing and cable bend radius so airflow is not restricted.

Which ATX connector should I use on a motherboard with a 24-pin socket?

The supplied 14-inch ATX lead supports both 20-pin and 24-pin layouts; plug the full 24-pin block into the board and leave the extra four pins unattached if the socket is 20-pin.

When should the internal fan be cleaned or replaced?

Clean the 80 mm fan intake with compressed air every six to twelve months; replace the fan if bearing noise appears or airflow drops noticeably.

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