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

Replace Power

Replace Power RPSU-C99-37 420W ATX power supply

SKU CH-WH8A-23V2J MPN RPSU-C99-37

ATX power supply delivering 420 W with switchable 110 V or 220 V input, an 80 mm fan, and connectors including SATA, 20+4 pin ATX, 12 V ATX, Molex and floppy

  • ColorGrey
  • TypeATX
  • Fans1
  • Weight0.1
  • 420W output powers demanding desktop builds
  • Switchable 110V or 220V input suits global mains
  • 80mm fan cools the unit quietly
  • 20+4 pin ATX connector fits most motherboards
  • SATA power lead supports modern drives

Replacement 420W ATX Power Supply

This 420W ATX unit replaces the Delta GPS-450AA-100 A and DPS-350AB-8A models. It fits HP, Dell, Compaq and other common desktop systems needing a direct swap. The grey power module includes a switchable 110V or 220V input for regional mains voltage. One 80mm fan handles airflow through the chassis.

Thermals Noise and Power Draw

The single 80mm fan provides cooling for the 420W rated output under normal desktop loads. Switchable 110V and 220V input lets the unit run on standard mains without extra configuration. Power delivery is distributed across multiple rails to support typical system components. Acoustic output remains consistent with standard office desktop power supplies.

Connector Layout and Compatibility

Connectors include one 15-inch SATA lead, one 14-inch 20+4 pin ATX motherboard cable and one 14-inch 12V ATX cable. Two 15-inch and two 6-inch large peripheral connectors plus one 6-inch small connector cover drives and older devices. Builders needing more SATA ports or additional 12V EPS cables should look elsewhere. The fixed cable lengths suit standard ATX chassis layouts.

Highlights

  • 420W output powers demanding desktop builds
  • Switchable 110V or 220V input suits global mains
  • 80mm fan cools the unit quietly
  • 20+4 pin ATX connector fits most motherboards
  • SATA power lead supports modern drives

Specifications

BrandReplace Power
ModelRPSU-C99-37
ColorGrey
TypeATX
Fans1
Weight0.1

Questions about this item

How do I install the 20+4 pin ATX connector so it seats correctly on a 24-pin motherboard socket?

Align the 20-pin block with the socket’s first 20 holes, then press the separate 4-pin piece into the remaining four holes until both latches click.

Which part of this unit will need replacement first under normal use?

The single 80mm fan is the only moving component; when its bearings wear the airflow drops and the supply runs hotter.

What is the first limit reached when the supply runs at full load for long periods?

The 420 W total output ceiling is reached before any individual rail trips, so sustained draw above that level triggers protection shutdown.

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