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

KHACHIMO

KHACHIMO 400W ATX Power Supply FSP-400WSUH-15

SKU CH-G657-JVJEF

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

  • TypeATX
  • Faster wake-from-sleep with Modern Standby support
  • Lower power draw thanks to 80 PLUS Gold efficiency
  • Near-silent operation via Zero RPM fan mode at low loads
  • Clean, stable power from resonant LLC and DC-to-DC topology
  • Reduced coil whine for quieter overall system noise

400W ATX power supply for compact builds

The KHACHIMO FSP-400WSUH-15 delivers 400 watts of continuous power in a standard ATX form factor. It is designed for systems that require Modern Standby support and efficient low-load operation. The unit suits office PCs, small-form-factor desktops and basic workstations. Builders needing higher wattage for discrete graphics cards should look elsewhere.

Sustained load behaviour and efficiency

An 80 PLUS Gold rating means the supply maintains high efficiency across typical workloads, reducing heat and fan activity. The resonant LLC topology with DC-to-DC conversion keeps voltage regulation tight during extended sessions. Zero RPM mode stops the fan completely at low and medium loads, eliminating noise when the system idles or handles light tasks.

Installation notes and common pitfalls

Standard ATX dimensions and connector layout allow a straightforward swap in compatible chassis. The 15V 24A output profile is specific to certain OEM platforms; verify the motherboard pin-out before connecting. Mis-matching this proprietary rail configuration is the most frequent cause of a failed POST. No additional cables or adapters are included.

Points forts

  • Faster wake-from-sleep with Modern Standby support
  • Lower power draw thanks to 80 PLUS Gold efficiency
  • Near-silent operation via Zero RPM fan mode at low loads
  • Clean, stable power from resonant LLC and DC-to-DC topology
  • Reduced coil whine for quieter overall system noise

Caractéristiques

TypeATX

Questions sur cet article

How loud and hot does the 400W unit get during all-day use?

The 80 PLUS Gold certification keeps efficiency high, so less waste heat is produced and the Zero RPM fan mode stops the fan completely at low and medium loads for near-silent operation.

What must my PC already have for this 15V 24A supply to work?

A standard ATX motherboard and case that accept a regular ATX power supply; the unit provides the 24-pin, CPU and PCIe cables needed for typical builds.

Will the resonant LLC topology with DC-to-DC conversion cause issues with older components I keep?

The topology delivers clean, consistent power and reduces coil whine, which helps older parts run stably and also enables modern energy-efficient sleep states.

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