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

KHACHIMO

KHACHIMO 400W ATX Power Supply ACE-840A-RS

SKU CH-9BV0-2FWQF

An ATX power supply delivering 400 watts with 80 PLUS Gold efficiency, Modern Standby compatibility and a zero-RPM fan mode for silent low-load operation

  • TypeATX
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode keeps the system silent at low load
  • Modern Standby support delivers instant wake-from-sleep
  • Resonant LLC with DC-to-DC conversion provides clean, stable power
  • 400 W ATX capacity covers mainstream builds

400W ATX Power Supply for Modern Standby Builds

The KHACHIMO ACE-840A-RS delivers 400W of continuous power in a standard ATX form factor. It is aimed at system integrators and DIY builders who need a compact, efficient unit for mainstream desktops or small-form-factor workstations. Its Modern Standby compatibility ensures extremely fast wake-from-sleep times and improved low-load efficiency for contemporary operating systems.

80 PLUS Gold Efficiency with Zero RPM Fan

An 80 PLUS Gold certification guarantees high efficiency operation, reducing power consumption, noise output and operating temperatures. The Zero RPM Fan Mode stops the cooling fan completely at low and medium loads, providing near-silent operation during typical desktop tasks. Resonant LLC topology with DC-to-DC conversion supplies clean, consistent power while minimising coil whine and supporting deeper sleep states.

Modern Standby and Quiet Computing Ready

The bundled Modern Standby support changes daily use by enabling instant resume and better efficiency at idle without extra configuration. Zero RPM mode removes fan noise during light workloads such as web browsing or media playback. The LLC resonant design with DC-to-DC conversion further reduces audible coil whine, making the unit suitable for noise-sensitive environments.

Puntos fuertes

  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode keeps the system silent at low load
  • Modern Standby support delivers instant wake-from-sleep
  • Resonant LLC with DC-to-DC conversion provides clean, stable power
  • 400 W ATX capacity covers mainstream builds

Especificaciones

TypeATX

Preguntas sobre este artículo

Does the ATX form factor fit standard mid-tower cases?

The ATX size matches the standard mounting pattern used by most mid-tower and full-tower chassis.

What cables are required to connect the 400W unit to a modern motherboard?

Use the 24-pin ATX connector for the board and the 4+4-pin EPS connector for the CPU; both are fixed to the supply.

How do I enable the Zero RPM fan mode after installation?

No software setup is needed; the fan stops automatically when the load stays in the low-to-medium range.

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