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Rectangular metal ATX power supply unit with single fan and multiple cable connectors

Replace Power

Replace Power RPMPS3420-998 300W ATX power supply

SKU CH-G2GB-XXRKH MPN RPMPS3420-998

A 300W ATX replacement power supply compatible with Hipro and SeaSonic units, offering 24-pin, 4-pin, SATA, PCI-E and legacy connectors

  • Fan configuration1
  • Product typeATX
  • Product weight0.1
  • 300 W output powers demanding desktop builds
  • 24-pin ATX connector fits 20-pin and 24-pin motherboards
  • Three SATA power connectors support multiple drives
  • Replaces Hipro and SeaSonic 300 W units directly
  • Over-voltage protection safeguards connected components

Replacement 300W ATX Power Supply

This Replace Power RPMPS3420-998 unit is a direct replacement for Hipro HP-P3017F3 LF and SeaSonic SS-250FS models. It delivers 300W of continuous power in a standard ATX form factor with a single cooling fan. The supply is built for system integrators and repair technicians who need a drop-in substitute for those specific OEM units.

20+4 Pin Motherboard Connector

The unit provides a single 20+4 pin ATX connector that fits both 20-pin and 24-pin motherboard headers, plus one P4 12V 4-pin, three SATA 15-pin, one PCI-E 6-pin, three LP4 4-pin, one floppy 4-pin, one auxiliary 6-pin and one HP video 4-pin connector. This connector mix matches the original Hipro and SeaSonic units exactly.

For Legacy System Repairs

Suitable for technicians restoring or maintaining older desktops that originally shipped with the listed Hipro or SeaSonic power supplies. Not suitable for builders who need more SATA ports, additional PCI-E connectors or higher wattage for modern components.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $61.99
Cheaper than about 84% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Brand nameReplace Power
Model nameRPMPS3420-998
Product typeATX
More details
Fan configuration1

Questions about this item

How much continuous power does the 300W rating actually deliver to the components?

The unit is rated for 300W total output, meaning it can supply up to that combined wattage across all rails when installed in a working system.

What motherboard power standard does the 20+4 pin ATX connector support?

The 20+4 pin ATX connector fits both 20-pin and 24-pin motherboard sockets, covering the common ATX12V form factor.

Will the RPMPS3420-998 fit a standard ATX case mounting pattern?

Yes, it is an ATX form-factor power supply with a single fan, designed to mount in standard ATX chassis cut-outs.

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