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Grey ATX power supply unit with single fan and multiple cables

Replace Power

Replace Power RPS400-a6323 400w ATX power supply

SKU CH-CZXY-QCV62 MPN RPS400-a6323

400 W ATX power supply with 20+4 pin, 4-pin CPU, three SATA, two Molex and one floppy connector for compatible HP Pavilion desktops

  • Fan configuration1
  • Product colorGrey
  • Product typeATX
  • Product weight0.1
  • 400 W output powers HP Pavilion a6323w and compatible models
  • 20+4 pin ATX connector fits both 20-pin and 24-pin motherboards
  • Three SATA 15-pin connectors support multiple drives
  • Over-voltage protection safeguards components from power spikes
  • Compact 5.8 x 3.37 inch form factor fits standard ATX cases

Replacement for HP Pavilion Desktops

This 400w ATX power supply from Replace Power is built to fit HP Pavilion a6323w, a6403w, a650y, a6742p and m300y CTO systems. It uses a standard 20+4 pin motherboard connector that works with both 20-pin and 24-pin boards. A single fan cools the grey chassis. The unit weighs 0.1.

Upgrading from a Failed or Weak Unit

The PSU replaces the original factory supply when it fails or can no longer support added drives. It adds three SATA 15-pin connectors for modern storage, two Molex 4-pin leads for legacy devices and a floppy 4-pin plug. A P4 12V 4-pin connector feeds the CPU. High efficiency and low ripple with over-voltage protection keep rails stable.

For Owners of Listed Pavilion Models

This unit suits owners of the named HP Pavilion desktops who need a direct drop-in replacement with the exact connector mix. Builders working on other platforms or custom cases should verify dimensions of 5.8 by 3.37 and the ATX form factor before buying. It is not for systems needing higher wattage or different connector layouts.

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).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameReplace Power
Model nameRPS400-a6323
Product colorGrey
Product typeATX
More details
Fan configuration1

Questions about this item

Will the 5.8 by 3.37 inch grey ATX unit fit the original HP Pavilion a6323w chassis?

Yes, the dimensions match the standard ATX footprint used in the listed HP Pavilion models, so the supply slides into the same mounting holes.

Which cables must be connected during installation, and which one do builders often forget?

Connect the 24 (20+4) pin ATX motherboard cable, the P4 12 V 4 pin CPU cable, three SATA 15 pin drives, two Molex 4 pin peripherals and the floppy 4 pin if used; the 4 pin CPU cable is the most commonly missed.

When should the internal 12 cm fan be cleaned or the unit replaced?

Clean the fan intake every 6 to 12 months with compressed air; replace the supply if voltages drift, ripple rises or the fan becomes noisy after several years of continuous use.

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