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Rectangular black metal ATX power supply unit with cooling fan and cable bundle

KHACHIMO

KHACHIMO 400W ATX power supply MP4-1S-1L-00 73-540-0623

SKU CH-ZJQB-TVQNB

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

  • TypeATX
  • Fast wake-from-sleep and better low-load efficiency with Modern Standby compatibility
  • Lower power consumption, less noise and cooler temperatures from 80 PLUS Gold certification
  • Near-silent operation at low and medium loads thanks to Zero RPM fan mode
  • Clean, consistent power and reduced coil whine via resonant LLC topology with DC-to-DC conversion
  • Energy-efficient sleep states enabled by resonant LLC topology with DC-to-DC conversion

400W ATX power supply for modern standby PCs

This 400W ATX power supply is built for desktop systems that rely on Modern Standby for instant wake and low-power sleep states. It suits builders who want certified Gold efficiency without moving to higher wattage tiers. The unit delivers stable power for mainstream CPUs and single-GPU configurations. It is not intended for multi-GPU arrays or workstations that demand sustained loads above 400W.

80 PLUS Gold efficiency with zero-RPM fan mode

Gold certification means high efficiency across typical loads, reducing waste heat and keeping internal temperatures lower. At low and medium loads the fan stops completely, eliminating audible noise during office work or media playback. Resonant LLC topology with DC-to-DC conversion further suppresses coil whine and supports deeper sleep states. Under heavy load the fan engages to maintain safe thermals.

Modern Standby support enables faster wake times

The platform-compatible design allows the OS to enter and exit low-power states more quickly than legacy sleep modes. This improves responsiveness for users who leave their PC on standby throughout the day. No extra cables or software utilities are mentioned in the specifications. The package provides the essential connectors for a standard ATX build.

Highlights

  • Fast wake-from-sleep and better low-load efficiency with Modern Standby compatibility
  • Lower power consumption, less noise and cooler temperatures from 80 PLUS Gold certification
  • Near-silent operation at low and medium loads thanks to Zero RPM fan mode
  • Clean, consistent power and reduced coil whine via resonant LLC topology with DC-to-DC conversion
  • Energy-efficient sleep states enabled by resonant LLC topology with DC-to-DC conversion

Specifications

TypeATX

Questions about this item

How do I install this ATX power supply and what step is often missed?

Mount the unit in the case with four screws, connect the 24-pin ATX and 4+4-pin CPU cables, then attach PCIe leads; the step most often missed is plugging in the CPU power cable near the socket.

What maintenance or replacement will this unit need later?

The 80 PLUS Gold certified unit uses a Zero RPM fan mode; the fan is the only moving part, so plan to clean dust from its intake or replace the fan if bearing noise develops after years of use.

What limit appears first during sustained heavy loads on this 400 W supply?

The 400 W continuous power rating is the first limit; sustained draws above that will trigger over-power protection and shut the unit down.

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