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Silver rectangular ATX power supply unit with fan grille

KHACHIMO

KHACHIMO HF400W-ST 48V 8.3A 400W ATX power supply

SKU CH-YV2J-3XCCK

A 400 W ATX power supply with 80 PLUS Gold efficiency, Modern Standby support, a Zero RPM fan mode for silent low-load operation, and resonant LLC plus DC-to-DC topology for clean.

  • TypeATX
  • Fast wake from sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops at low load for silent running
  • Resonant LLC and DC-to-DC topology deliver clean, stable power
  • 400 W output at 48 V and 8.3 A for ATX systems

Modern Standby Ready ATX Power Supply

The KHACHIMO HF400W-ST is a 400 W ATX power supply built for systems that use Modern Standby sleep states. Its 48 V rail delivers up to 8.3 A, supporting fast wake-from-sleep times and improved low-load efficiency. The unit suits compact or efficiency-focused desktop builds that prioritise quiet, reliable power delivery.

80 PLUS Gold Efficiency with Fanless Low-Load

Certified 80 PLUS Gold, the supply reduces wasted energy, heat and noise across typical workloads. A Zero RPM fan mode stops the cooling fan entirely at low and medium loads for near-silent running. Resonant LLC topology with DC-to-DC conversion provides clean, consistent power while enabling deeper, more energy-efficient sleep states without extra cables or adapters.

Sustained Load Stability Through Resonant LLC Design

Under continuous demand the resonant LLC topology maintains tight voltage regulation and low ripple, protecting sensitive components during long work sessions. DC-to-DC conversion minimises coil whine even when the unit runs at higher output. The fan remains off until thermal thresholds require active cooling, so acoustics stay low throughout extended operation.

Besonderheiten

  • Fast wake from sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops at low load for silent running
  • Resonant LLC and DC-to-DC topology deliver clean, stable power
  • 400 W output at 48 V and 8.3 A for ATX systems

Technische Daten

TypeATX

Fragen zu diesem Artikel

What is the maximum continuous output this 400W unit can sustain?

The power supply is rated for 400W continuous output at 48V and 8.3A.

How loud does the fan get under sustained load?

Zero RPM mode stops the fan at low and medium loads; under heavier loads the fan spins to maintain safe temperatures.

Which motherboard power connector does this ATX unit require?

It uses the standard 24-pin ATX connector found on compatible motherboards.

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