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Grey ATX power supply unit with single fan

Replace Power

Replace Power RPSU-C99-31 420W ATX power supply

SKU CH-JSMC-J6T2V MPN RPSU-C99-31

420W ATX unit with 20+4 pin, SATA and peripheral connectors for Compaq Presario desktops

  • ColorGrey
  • TypeATX
  • Fans1
  • Weight0.1
  • Reliable power for compatible Compaq Presario desktops with 420W output
  • Flexible motherboard fit using 20+4 pin ATX connector supporting both 20-pin and 24-pin configurations
  • Drive and peripheral support via SATA power and multiple large and small power connectors
  • Switchable input voltage for 110V or 220V operation
  • Cooling provided by an 80mm fan

Replacement for Compaq Presario SR series

This 420W ATX power supply is built as a direct replacement for Compaq Presario SR1350NX, SR1500NX, SR1503LS, SR1503WM and SR1517CL desktops. It delivers 420W through a standard ATX form factor with a single 80mm cooling fan. The unit suits owners of those models who need a new power module to restore reliable operation.

Straightforward swap with fixed cables

Installation follows a standard ATX layout: remove the old unit, mount this one with four screws and connect the keyed plugs. The 20+4 pin motherboard connector fits both 20-pin and 24-pin boards, while the 12V ATX, SATA, Molex and floppy leads are fixed in length. The main cables measure 14 or 15 inches; the shorter peripheral leads are 6 inches. Route the shorter wires first to avoid tension on the connectors.

Verify case fit and connector needs

Confirm the grey ATX chassis fits the Presario case opening and that the 80mm fan aligns with the vent. Check the 110V/220V input switch matches your mains voltage before powering on. Ensure the system requires only one SATA device connector, one 12V ATX plug and the provided Molex and floppy leads; builds needing extra SATA or PCIe power will find the cable count insufficient.

Highlights

  • Reliable power for compatible Compaq Presario desktops with 420W output
  • Flexible motherboard fit using 20+4 pin ATX connector supporting both 20-pin and 24-pin configurations
  • Drive and peripheral support via SATA power and multiple large and small power connectors
  • Switchable input voltage for 110V or 220V operation
  • Cooling provided by an 80mm fan

Specifications

BrandReplace Power
ModelRPSU-C99-31
ColorGrey
TypeATX
Fans1
Weight0.1

Questions about this item

How can I confirm the RPSU-C99-31 is working after installation?

The 80 mm fan should spin, the system should boot without unexpected shutdowns, and the 20+4 pin ATX, 12 V ATX, SATA and peripheral connectors must deliver stable power to the motherboard and drives.

Which cables and connectors are included with the RPSU-C99-31 and what must I source separately?

The unit ships with one 15-inch SATA lead, one 14-inch 20+4 pin ATX lead, one 14-inch 12 V ATX lead, two 15-inch and two 6-inch large peripheral leads plus one 6-inch small peripheral lead; no extra cables are required for a typical Compaq Presario SR1350NX, SR1500NX, SR1503LS, SR1503WM or SR1517CL build.

Which Replace Power model should I choose for a 420 W Compaq Presario desktop?

Select the RPSU-C99-31; it is the single 420 W ATX unit listed for the SR1350NX, SR1500NX, SR1503LS, SR1503WM and SR1517CL chassis and includes the 110 V / 220 V switchable input.

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