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Grey ATX power supply unit, rectangular metal case, single fan visible, 400 W label

Replace Power

Replace Power RPSU-C95-12 400 W ATX power supply

SKU CH-1HDX-F3FSE MPN RPSU-C95-12

A 400 W ATX replacement power supply with a 20+4 pin motherboard connector, 4-pin CPU power, three SATA and two Molex peripheral connectors, and over-voltage protection

  • Fan configuration1
  • Product colorGrey
  • Product typeATX
  • Product weight0.1
  • 400 W output powers demanding desktop builds
  • 20+4 pin ATX connector fits 20-pin and 24-pin motherboards
  • Three SATA 15-pin connectors support multiple drives
  • Over-voltage protection guards components from power spikes
  • Compact 5.8 x 3.37 inch chassis suits tight cases

Replacement power module

The Replace Power RPSU-C95-12 is a 400 W ATX power module designed as a direct replacement for the High Power SI-A400M2 unit. It fits standard ATX layouts and uses a single fan in a grey chassis weighing 0.1 kg. The module targets repair technicians and system builders who need a drop-in spare for compatible desktop platforms.

Capacity and headroom

Rated at 400 W, the supply delivers enough power for typical office or home-office workloads including integrated graphics, multiple drives and standard peripherals. Heavy discrete GPUs, large drive arrays or sustained high-current loads on the 12 V rail will exceed its headroom. Protection circuits include output over-voltage protection plus low ripple and noise figures for stable rail delivery.

Build integration

The unit provides one 24-pin ATX (20+4) connector, one P4 12 V 4-pin connector, three SATA 15-pin connectors, two Molex 4-pin connectors and one floppy 4-pin connector. Physical dimensions are 5.8 by 3.37 units, so case clearance should be verified before installation. No modular cabling is offered; all leads are fixed. Compatibility extends to a wide range of desktop brands using the SI-A400M2 form factor.

How it compares

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

Price $59.99
Cheaper than about 85% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Brand nameReplace Power
Model nameRPSU-C95-12
Product colorGrey
Product typeATX
More details
Fan configuration1

Questions about this item

Will the 20+4 pin ATX and 4-pin P4 connectors on this RPSU-C95-12 fit an older motherboard that only has a 20-pin socket?

Yes, the 20+4 pin ATX connector splits so the 20-pin portion plugs directly into a 20-pin motherboard socket while the extra 4 pins hang aside, and the separate 4-pin P4-12V connector handles CPU power on boards that require it.

How can I confirm the RPSU-C95-12 is delivering stable power after installation?

The unit includes output over-voltage protection and is rated for low ripple and noise; if the system boots reliably, runs without random shutdowns and the single fan spins quietly, the supply is operating within its 400 W design limits.

Which cables come attached to the RPSU-C95-12 and what might I still need to buy?

Fixed cables provide one 20+4 pin ATX, one 4-pin P4-12V, three SATA 15-pin, two Molex 4-pin and one floppy 4-pin connector; any additional SATA, Molex or PCIe cables would need separate adapters.

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