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Rectangular ATX power supply unit with matte black metal casing and rear fan grille

KHACHIMO

KHACHIMO 400W ATX Switching Power Supply R1CA2401A

SKU CH-789X-XC3PQ

400W ATX switching power supply tested working, first listed March 2024

  • Product typeATX
  • ATX form factor fits standard desktop cases
  • 400W output powers typical office and home builds
  • Tested working so it arrives ready to install
  • Good quality components support reliable daily operation
  • First listed by manufacturer March 14, 2024

400W ATX Power Supply

The KHACHIMO 400W ATX switching power supply delivers 400 watts of rated output for standard desktop builds. It suits system integrators and home users assembling or repairing office and entry-level PCs. The unit follows the ATX form factor for broad chassis compatibility.

Tested unit ready for installation

Each unit is test working before dispatch, confirming basic electrical function out of the box. This verification step reduces the chance of a dead-on-arrival component during a build. No extra cables, adapters or software bundles are included with the supply.

Capacity for core components and basic graphics

The 400W rating handles a modern CPU, motherboard, memory, storage and a low-to-mid-range graphics card without strain. Systems demanding multiple high-end GPUs, heavy overclocking or many drives will exceed the available headroom. Builders planning such configurations should select a higher-wattage model.

How it compares

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

Price $446.99
Pricier than about 87% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

What internal components in this 400W ATX unit are most likely to need replacement after years of continuous operation?

The electrolytic capacitors and cooling fan are the parts that typically wear out first in a switching power supply of this class.

Which protection limit activates first when this 400W supply runs at full load for extended periods?

The over-temperature protection circuit will trigger before the over-current limit if internal heat builds up faster than the fan can exhaust it.

How much heat and fan noise should I expect when this 400W ATX supply runs all day near its rated output?

Expect noticeable warmth from the exhaust vent and a moderate fan drone; the unit moves enough air to stay within safe thermal limits at 400W continuous load.

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