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Rectangular ATX power supply unit with matte black metal casing and cooling fan grille

KHACHIMO

KHACHIMO HK400-58FP 300W Peak 400W ATX Power Supply

SKU CH-WZ0E-TZ9FB

An ATX power supply delivering 300 W peak and 400 W continuous output with 80 PLUS Gold efficiency, Modern Standby support, zero-RPM fan mode and resonant LLC topology with DC-to-DC conversion

  • TypeATX
  • Modern Standby support gives extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power use
  • Zero RPM fan mode stops the fan at low loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power
  • 300W continuous and 400W peak output handle demanding system loads

ATX Power Supply for Modern Standby Systems

The KHACHIMO HK400-58FP is a 300 W continuous ATX unit rated for 400 W peak output. It carries 80 PLUS Gold certification for high efficiency across typical loads. Modern Standby compatibility enables extremely fast wake-from-sleep times and improved low-load efficiency. Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power while reducing coil whine.

Upgrade from Lower-Efficiency

Replacing an older Bronze-rated or non-certified supply brings measurable gains in efficiency, heat output, and acoustic profile. The jump is worth it when building or refreshing a system that relies on Modern Standby sleep states for instant resume. Zero RPM fan mode eliminates fan noise at low and medium loads, a benefit absent from basic designs that spin continuously.

300 W Continuous Capacity with 400 W Peak Headroom

The unit comfortably handles mainstream desktop configurations drawing up to 300 W sustained, with 400 W peak headroom for transient spikes. It runs out when a build demands sustained loads above the rated continuous wattage, such as high-end multi-GPU arrays or heavily overclocked workstations. Builders needing more than 300 W continuous should select a higher-capacity model.

Points forts

  • Modern Standby support gives extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power use
  • Zero RPM fan mode stops the fan at low loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power
  • 300W continuous and 400W peak output handle demanding system loads

Caractéristiques

TypeATX

Questions sur cet article

What physical clearance does the HK400-58FP need inside an ATX case?

The unit follows the standard ATX form factor, so it fits any case with an ATX power-supply bay and the usual rear mounting screws.

Which cables must be connected during installation, and what is the common oversight?

Connect the 24-pin ATX motherboard cable and the 4+4-pin CPU power cable; the step often missed is seating the CPU power connector fully so the clip clicks.

What component will need attention after extended use?

The 80 PLUS Gold certified internal components are rated for long life; the cooling fan is the only moving part and may eventually require replacement if bearing noise develops.

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