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Standard ATX power supply unit in matte black finish with cooling fan grille

KHACHIMO

KHACHIMO HK500-12FP S1 400W 500W ATX power supply

SKU CH-Q2BD-0B2Y9

ATX power supply rated 400 W continuous and 500 W peak with 80 PLUS Gold efficiency, Modern Standby support, zero-RPM fan mode and resonant LLC topology

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops the fan at low loads
  • Resonant LLC topology with DC-to-DC delivers clean power
  • 400 W continuous and 500 W peak capacity for stable output

ATX power supply for modern standby systems

This new ATX unit delivers a continuous 400 W rating with a 500 W peak capacity, making it suitable for mainstream desktop builds that rely on fast sleep and wake cycles. The design targets users who want efficient, quiet power without stepping up to higher-wattage enthusiast models.

Sustained load efficiency and thermal behaviour

80 PLUS Gold certification means the supply maintains high efficiency across typical workloads, reducing waste heat and keeping internal temperatures lower during extended use. Resonant LLC topology with DC-to-DC conversion provides stable voltage regulation under continuous demand while minimising coil whine.

Practical limits of the ATX interface

The 400 W continuous ceiling defines the maximum reliable draw for components connected through standard ATX connectors, so configurations with multiple high-power GPUs or heavy overclocking headroom fall outside its design envelope. Zero RPM fan mode operates only while load remains within the low-to-medium range where passive cooling suffices.

Highlights

  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops the fan at low loads
  • Resonant LLC topology with DC-to-DC delivers clean power
  • 400 W continuous and 500 W peak capacity for stable output

Specifications

TypeATX

Questions about this item

Does the Zero RPM fan mode on the HK500-12FP S1 keep it silent during all-day low-load use?

Yes, the Zero RPM Fan Mode stops the cooling fan entirely at low and medium loads, giving near-silent operation while the 80 PLUS Gold efficiency reduces heat output.

What must my case and motherboard provide to install this ATX power supply?

A standard ATX mounting bay and a 24-pin motherboard power socket are required; the unit follows the ATX form factor.

Will the resonant LLC topology with DC-to-DC conversion on this unit work reliably with older components I keep?

The resonant LLC topology with DC-to-DC conversion delivers clean, consistent power and supports modern energy-efficient sleep states, aiding compatibility with legacy hardware.

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