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Grey ATX power supply unit with single fan and standard connectors

Replace Power

Replace Power AP-MPS3ATX30-2 300W ATX power supply

SKU CH-BW38-YAZSG MPN AP-MPS3ATX30-2

300 W ATX unit with one fan, a 20+4-pin connector, a 4-pin ATX12V plug, two peripheral leads, a floppy connector and three SATA power connectors

  • Fan configuration1
  • Product colorGrey
  • Product typeATX
  • Product weight0.1
  • 300W steady output powers Compaq DX2400 microtower
  • High efficiency design reduces wasted energy
  • Low ripple and noise protects sensitive components
  • Output over-voltage protection guards connected hardware
  • Full connector set includes SATA, ATX and peripheral plugs

Replacement for Compaq Microtower DX2400

This 300W ATX power supply replaces the original unit in Compaq Microtower DX2400 and dx2355 business desktops. It delivers steady power for office workloads and general-purpose computing. The grey chassis houses a single fan for cooling. It suits users restoring or maintaining these specific legacy systems.

Installation and common issues

The unit uses standard ATX mounting points and a single 20+4-pin motherboard connector plus a 4-pin ATX12V plug. Peripheral, floppy and three SATA power connectors cover typical legacy drives. Misaligned screw holes in non-Compaq chassis can prevent a secure fit. The short cable loom may not reach connectors in larger cases.

Check your system before ordering

Verify the existing power supply is a standard ATX form factor and not a proprietary shape. Confirm the motherboard requires both a 20+4-pin and a 4-pin 12 V connector. Ensure the case has room for a single rear exhaust fan. Check that 300W meets the combined load of your installed components.

How it compares

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

Price $63.99
Cheaper than about 83% 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 nameAP-MPS3ATX30-2
Product colorGrey
Product typeATX
More details
Fan configuration1

Questions about this item

How can I confirm the AP-MPS3ATX30-2 is running correctly after installation?

The system powers on reliably, the single fan spins, and voltages remain stable across the 20+4-pin ATX, 4-pin ATX12V, three SATA, two peripheral and one floppy connectors.

Which connectors and cables are included with the AP-MPS3ATX30-2, and what must I source separately?

The unit ships with one 20+4-pin ATX, one 4-pin ATX12V, three SATA, two peripheral and one floppy connector; no extra cables are required for a standard Compaq Microtower DX2400 or dx2355 build.

Should I choose the 300 W grey ATX model or a different capacity for my Compaq Microtower DX2400 or dx2355?

The 300 W grey ATX version matches the original spec for both the DX2400 and dx2355, so select this model for a direct replacement.

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