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Rectangular black ATX power supply with gold certification badge and cooling fan visible

KHACHIMO

KHACHIMO SO-400EPS 400W 80 PLUS Gold power supply

SKU CH-SB04-338N0

An 80 PLUS Gold ATX unit delivering 400W with Modern Standby support, zero-RPM fan mode and LLC resonant DC-to-DC topology for clean, quiet power

  • TypeATX
  • Fast wake-from-sleep with Modern Standby compatibility
  • High 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode keeps operation near-silent at low loads
  • Resonant LLC with DC-to-DC delivers clean, stable power
  • 400W ATX output fits standard desktop builds

ATX 400W Gold power supply

The KHACHIMO SO-400EPS is an ATX form-factor unit rated at 400W with 80 PLUS Gold certification. It targets mainstream desktop builds that need reliable power without excess capacity. Modern Standby compatibility ensures fast wake times for supported platforms.

Sustained-load behaviour

Resonant LLC topology with DC-to-DC conversion delivers stable voltage regulation across the full output range. The design maintains efficiency targets during extended workloads rather than only in short bursts. Clean power delivery helps protect sensitive components during continuous operation.

Thermals, noise and power draw

Zero RPM fan mode stops the cooling fan entirely at low and medium loads for silent running. 80 PLUS Gold efficiency reduces waste heat and overall power consumption under typical conditions. The topology also minimises coil whine for quieter operation in noise-sensitive environments.

Highlights

  • Fast wake-from-sleep with Modern Standby compatibility
  • High 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode keeps operation near-silent at low loads
  • Resonant LLC with DC-to-DC delivers clean, stable power
  • 400W ATX output fits standard desktop builds

Specifications

TypeATX

Questions about this item

How loud is the KHACHIMO SO-400EPS when running all day?

The 80 PLUS Gold certified unit runs cooler and quieter, while its Zero RPM Fan Mode stops the fan entirely at low and medium loads for near-silent operation.

What must I already own for the KHACHIMO SO-400EPS to work?

An ATX-compatible case and motherboard with standard 24-pin and CPU power connectors are required for installation.

Will the KHACHIMO SO-400EPS support Modern Standby on my older hardware?

Its Resonant LLC topology with DC-to-DC conversion enables more energy-efficient sleep states, so it works with Modern Standby-ready systems.

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