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Rectangular black ATX power supply unit with fan grille visible

KHACHIMO

KHACHIMO 400W ATX Power Supply MP4-1E-1L-1L-4NN-00 73-540-0670

SKU CH-2YSB-84YMB

400W ATX unit with 80 PLUS Gold efficiency, Modern Standby support, Zero RPM fan mode and LLC resonant topology with DC-to-DC conversion

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • Lower power draw and cooler running via 80 PLUS Gold efficiency
  • Near-silent operation at low loads thanks to Zero RPM fan mode
  • Clean, stable power delivery from resonant LLC with DC-to-DC conversion
  • Reduced coil whine and quieter sleep states through advanced topology

400 W ATX Power Supply

This KHACHIMO unit delivers 400 W through a standard ATX form factor. It carries 80 PLUS Gold certification for high efficiency and lower heat output. Modern Standby compatibility enables extremely fast wake-from-sleep times. The resonant LLC topology with DC-to-DC conversion provides clean, consistent power for stable system operation.

Suited For And Not Suited For

This supply suits builders who want quiet operation because the Zero RPM fan mode stops the fan at low and medium loads. It also suits systems that use Modern Standby sleep states for quick resume. It is not for builds that demand more than 400 W of continuous power. It is not for configurations that require additional PCIe power connectors beyond what this model provides.

80 PLUS Gold Efficiency

The 80 PLUS Gold rating confirms high efficiency across typical load ranges, reducing power consumption and keeping temperatures lower. This certification is the single specification that decides whether the unit meets your efficiency and thermal targets. The DC-to-DC conversion and LLC resonant topology support this efficiency while reducing coil whine.

Highlights

  • Fast wake-from-sleep with Modern Standby support
  • Lower power draw and cooler running via 80 PLUS Gold efficiency
  • Near-silent operation at low loads thanks to Zero RPM fan mode
  • Clean, stable power delivery from resonant LLC with DC-to-DC conversion
  • Reduced coil whine and quieter sleep states through advanced topology

Specifications

TypeATX

Questions about this item

How do I install the KHACHIMO 400W ATX power supply and which step is often missed?

Mount the unit in the case with four screws, connect the 24-pin ATX, 8-pin CPU, and PCIe cables to the motherboard and graphics card, then flip the rear switch to on; the step most people miss is seating the 24-pin connector fully until the latch clicks.

What maintenance will this 80 PLUS Gold unit need later?

The Zero RPM fan stops at low load, so dust builds up unseen; clean the intake grill and fan blades with compressed air once a year to keep airflow and efficiency at the certified level.

What limit appears first during sustained full-load use?

At continuous 400 W output the internal temperature rises until the fan spins at maximum speed; that thermal ceiling is the first constraint you will hit under heavy, prolonged workloads.

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