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Rectangular black metal ATX power supply unit with rear fan grille and side label

KHACHIMO

KHACHIMO 400W ATX power supply 80 PLUS Gold Modern Standby Zero RPM LLC DC-DC

SKU CH-JXCT-EHEJC

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

  • TypeATX
  • Modern Standby support for extremely fast wake-from-sleep times
  • 80 PLUS Gold certification for high efficiency and lower power consumption
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power
  • ATX form factor 400W power supply for standard desktop builds

400 W ATX Gold unit for Modern Standby PCs

This 400 W ATX power supply carries 80 PLUS Gold certification and is built for systems that use Modern Standby sleep states. It suits office workstations and compact home builds where low idle draw and fast wake times matter. Buyers who need higher continuous output for multi-GPU rigs or heavy overclocking should look elsewhere.

Gold efficiency with Zero RPM fan mode

At low and medium loads the cooling fan stops completely, removing audible noise while the Gold-rated design keeps waste heat and power draw down. The resonant LLC topology paired with DC-to-DC conversion delivers clean voltage regulation and helps suppress coil whine during quiet operation.

Modern Standby support and LLC DC-DC topology

Modern Standby compatibility enables extremely fast wake-from-sleep transitions and improved efficiency at very light loads. The LLC resonant converter combined with DC-to-DC secondary regulation reduces ripple, cuts coil whine and allows the platform to enter deeper, more energy-efficient sleep states.

Highlights

  • Modern Standby support for extremely fast wake-from-sleep times
  • 80 PLUS Gold certification for high efficiency and lower power consumption
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power
  • ATX form factor 400W power supply for standard desktop builds

Specifications

TypeATX

Questions about this item

How do I install this ATX power supply and which cable routing step is often missed?

Mount the unit in the case with the four standard screws, connect the 24-pin motherboard and CPU power cables, then route the modular cables behind the motherboard tray so the Zero RPM fan intake stays unobstructed.

What maintenance will this 400 W Gold unit need over its lifetime?

The Zero RPM fan should be dusted annually with compressed air while the PSU is unplugged; the 80 PLUS Gold LLC DC-DC design has no user-serviceable parts and no scheduled capacitor replacement.

Which limit appears first when this supply runs at high load for long periods?

Sustained loads near the 400 W rating disable Zero RPM mode, spin the fan continuously, and raise internal temperatures until the protection circuitry throttles output.

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