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Compact 1U FLEX power supply unit with matte black finish and rear fan grille

KHACHIMO

KHACHIMO 12V K39 S3 FLEX NAS 1U 400W power supply

SKU CH-FNM3-4CDQ3

A compact 1U 400W Flex ATX power supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for quiet, low-power NAS builds

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • High efficiency cuts power use and heat with 80 PLUS Gold
  • Silent operation at low loads via Zero RPM fan mode
  • Clean, stable power delivery through resonant LLC with DC-to-DC
  • Compact 1U 400W flex form factor for NAS and ITX builds

Compact 1U Flex form factor for space-constrained

The KHACHIMO 12V K39 S3 FLEX NAS power supply fits the 1U Flex ATX standard, making it suitable for slim NAS enclosures, small-form-factor workstations and other chassis where vertical clearance is limited. It delivers 400 W of continuous power from a single 12 V rail to support modern components in tight spaces.

Steady output under sustained load

Resonant LLC topology combined with DC-to-DC conversion keeps voltage regulation tight during prolonged workloads such as file-server duties or compute tasks. The design maintains clean, consistent power without the ripple spikes that can appear on simpler topologies when the unit runs near its 400 W rating for extended periods.

80 PLUS Gold efficiency

Certified 80 PLUS Gold efficiency reduces waste heat, lowering overall system temperatures and fan demand. At low and medium loads the cooling fan stops completely, eliminating audible noise, while Modern Standby compatibility enables rapid wake-from-sleep transitions and improved low-load efficiency.

Puntos fuertes

  • Fast wake-from-sleep with Modern Standby support
  • High efficiency cuts power use and heat with 80 PLUS Gold
  • Silent operation at low loads via Zero RPM fan mode
  • Clean, stable power delivery through resonant LLC with DC-to-DC
  • Compact 1U 400W flex form factor for NAS and ITX builds

Especificaciones

TypeATX

Preguntas sobre este artículo

How loud does the 400W supply get when it runs 24/7 in a NAS?

The Zero RPM fan mode stops the fan completely at low and medium loads, so the unit is near-silent during typical NAS operation.

Which cables or connectors must my build already have for this 12V FLEX unit?

It uses the standard ATX connector set, so a motherboard with a 24-pin ATX socket and the usual peripheral leads is all that is required.

Will the 80 PLUS Gold platform work reliably with older drives and add-in cards I keep?

The resonant LLC topology with DC-to-DC conversion delivers clean, consistent power that supports legacy components without stability issues.

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