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Rectangular black ATX power supply unit with 80 PLUS Gold badge

KHACHIMO

KHACHIMO SPI400PFB 400W ATX 80 PLUS Gold power supply

SKU CH-ZPWA-JWR3C

A 400W ATX power supply with 80 PLUS Gold efficiency, Modern Standby support, Zero RPM fan mode and LLC resonant topology for quiet, stable power

  • TypeATX
  • Extremely fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency lowers consumption, noise and heat
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power
  • Resonant LLC topology reduces coil whine and enables efficient sleep states

400W ATX Gold power supply for quiet builds

The KHACHIMO SPI400PFB delivers 400W of continuous power through a standard ATX form factor. Its 80 PLUS Gold certification ensures high efficiency across typical loads, reducing waste heat and electricity draw. Modern Standby compatibility allows near-instant wake times for systems that use low-power sleep states. This unit suits office workstations, compact home PCs, or upgrades where low noise and efficiency matter more than extreme wattage.

Straightforward ATX fit with semi-passive cooling

Installation follows the usual ATX mounting pattern and uses a conventional 24-pin motherboard connector alongside CPU and peripheral cables. The Zero RPM fan mode keeps the fan completely stopped at low and medium loads, so cable routing near the intake is rarely critical. Builders should verify that their case allows bottom or top mounting with adequate airflow when the fan does spin up under heavier demand. No specialised tools or adapters are required beyond a standard Phillips screwdriver.

Steady output with resonant LLC and DC-to-DC design

Under sustained load the resonant LLC topology combined with DC-to-DC conversion maintains tight voltage regulation and low ripple, limiting coil whine even during long sessions. The Gold-rated efficiency curve keeps internal temperatures moderate, allowing the fan to remain off longer or spin slowly when active. This behaviour supports consistent performance for productivity workloads, media playback, or light gaming without thermal throttling or audible distraction.

Highlights

  • Extremely fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency lowers consumption, noise and heat
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power
  • Resonant LLC topology reduces coil whine and enables efficient sleep states

Specifications

TypeATX

Questions about this item

How can I confirm the 80 PLUS Gold efficiency is working after installation?

The fan stays off under light loads thanks to Zero RPM mode, and the system wakes from sleep almost instantly, showing Modern Standby and high-efficiency operation are active.

Which cables and connectors come in the box, and what must I source separately?

The unit ships with the fixed ATX power cables attached; any extra GPU or drive connectors beyond those included have to be purchased separately.

Which capacity should I choose for a mid-range build?

The 400 W model suits mainstream CPUs and single mid-range graphics cards, while higher-wattage versions would be needed for multi-GPU or heavy overclocking setups.

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