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Rectangular metal ATX power supply unit, matte black finish, cooling fan visible on one side, modular cable connectors on the rear

KHACHIMO

KHACHIMO 400W 80 PLUS Gold Power Supply

SKU CH-40RM-APE2Y

An 80 PLUS Gold 400W ATX power supply with Zero RPM fan mode and LLC resonant topology for silent, efficient operation

  • TypeATX
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops the fan at low loads for silent running
  • Modern Standby support gives faster wake-from-sleep and better idle efficiency
  • Resonant LLC with DC-to-DC conversion delivers clean power and reduces coil whine
  • ATX form factor fits standard desktop cases

KHACHIMO 400W Gold PSU

The KHACHIMO 400W unit is an ATX power supply certified to the 80 PLUS Gold efficiency level. It targets system builders who want lower energy draw, reduced heat output and quieter operation in a compact form factor. Modern Standby compatibility ensures rapid wake-from-sleep behaviour for supported platforms. The resonant LLC topology with DC-to-DC conversion delivers stable voltage regulation across varying loads.

Compatibility checklist before purchase

Verify that your chassis accepts a standard ATX power supply and that the physical dimensions match the available space. Confirm that the motherboard power connectors required by your board are present on the unit. Ensure the total system power demand stays within the 400 W rated output. Check that your case airflow can accommodate a unit with a zero-RPM fan mode that relies on passive cooling at low loads.

Integration notes for your build

The fan remains off at low and medium loads, freeing the acoustic budget for other components. Gold-rated efficiency reduces waste heat, easing the burden on case ventilation. DC-to-DC conversion supports modern low-power sleep states without voltage instability. The ATX form factor fits typical desktop enclosures, leaving drive bays and expansion slots unobstructed. Builders needing higher wattage or redundant power should consider a larger capacity unit.

Highlights

  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops the fan at low loads for silent running
  • Modern Standby support gives faster wake-from-sleep and better idle efficiency
  • Resonant LLC with DC-to-DC conversion delivers clean power and reduces coil whine
  • ATX form factor fits standard desktop cases

Specifications

TypeATX

Questions about this item

What comes in the box with the KHACHIMO 400W unit and what must I purchase separately?

The box contains the 400W power supply and the cables needed for a standard ATX build; no extra cables or adapters are required for typical motherboard, CPU and GPU connections.

Which efficiency rating should I choose for this 400W model?

This unit is the 80 PLUS Gold version, delivering higher efficiency and lower heat than the Bronze alternative mentioned in the supplier title.

What does the 400W rating mean once the supply is installed in my PC?

It means the unit can continuously deliver 400W of DC power across all rails while maintaining Gold-level efficiency, and the fan will stay off at low and medium loads thanks to Zero RPM mode.

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