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Rectangular ATX power supply in matte black metal with single fan and cable bundle

Replace Power

Replace Power RPSU-5187-1098 420W ATX power supply

SKU CH-S4R7-0J292 MPN RPSU-5187-1098

420 W ATX power supply with reduced depth, built-in 20+4 pin adapter, 110–260 V AC switchable input and full protection suite

  • TypeATX
  • Fans1
  • Weight1.5
  • Replaces legacy HP and Compaq units with 420W capacity
  • Built-in 20+4 pin connector supports 20 and 24 pin motherboards
  • Reduced depth of 5.9 inches fits compact ATX cases
  • Multiple protection circuits guard against over current and short circuit
  • Switchable 110-260V input works worldwide

Replacement ATX supply for legacy HP systems

This 420 watt ATX power supply replaces a long list of original HP, Compaq, Bestec, Hipro, Delta and eMachine units. It fits the same mounting pattern while adding a built-in 20+4 pin adapter that works with both 24 and 20 pin motherboards. Reduced depth improves clearance in tight chassis. Input voltage is switchable between 110 and 260 volts AC.

Suitable for owners restoring

Builders needing higher 12 volt current for modern graphics cards should look elsewhere. The unit delivers 8 amps on each 12 volt rail, which limits its use with power-hungry GPUs. Systems requiring more than three SATA power connectors will need additional adapters. It is not a general-purpose upgrade for new custom builds.

Single 12 volt rail current decides fit

Each 12 volt rail is rated at 8 amps, giving a combined 12 volt capacity that suits legacy Pentium 4 and Core 2 era platforms. Buyers must verify their graphics card and CPU power draw against this limit before purchasing. The 3.3 volt rail supplies 11 amps and the 5 volt rail supplies 12 amps.

Highlights

  • Replaces legacy HP and Compaq units with 420W capacity
  • Built-in 20+4 pin connector supports 20 and 24 pin motherboards
  • Reduced depth of 5.9 inches fits compact ATX cases
  • Multiple protection circuits guard against over current and short circuit
  • Switchable 110-260V input works worldwide

Specifications

BrandReplace Power
ModelRPSU-5187-1098
TypeATX
Fans1
Weight1.5

Questions about this item

What are the exact dimensions of this 420W ATX unit?

It measures 5.9 inches wide, 3.4 inches high and 4 inches deep.

Which cable should be connected first when installing this RPSU-5187-1098?

Seat the 20+4 pin ATX connector fully before attaching the P4 12V 4-pin, SATA or LP4 leads.

How often should the internal fan on this Replace Power supply be cleaned?

Blow dust from the single fan intake every six to twelve months to maintain airflow at up to 50 °C operating temperature.

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