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Silver metal 1U power supply unit with fan grille and cable connectors

KHACHIMO

KHACHIMO FSP 1U 400W ATX Power Supply FSP400-701US

SKU CH-QW90-AQGQV

A compact 1U 400W ATX power supply with 80 PLUS Gold efficiency, Modern Standby support, and a Zero RPM fan mode for silent low-load operation

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency lowers power draw and heat
  • Fan stops at low loads for silent running
  • Resonant LLC plus DC-to-DC gives clean, stable power
  • Compact 1U ATX form factor delivers 400 W

1U 400W ATX Power Supply

The KHACHIMO FSP 1U 400W ATX Power Supply FSP400-701US is a new switching power supply built for compact server chassis and rackmount systems. It delivers 400W of continuous power through an ATX form factor that fits 1U enclosures. The unit uses Resonant LLC topology with DC-to-DC conversion to maintain clean voltage regulation across all rails. Its 80 PLUS Gold certification confirms high efficiency at typical server loads.

Suited for dense rack builds and quiet workstations

This supply suits integrators who need reliable power in a 1U height and value low acoustic output. Modern Standby compatibility enables extremely fast wake-from-sleep transitions for always-on deployments. Zero RPM fan mode stops the fan entirely at low and medium loads for near-silent operation. Builders who require redundant power modules or higher wattage for multi-GPU configurations should consider other form factors.

80 PLUS Gold efficiency rating

The single specification that decides fit is the 80 PLUS Gold certification, which guarantees high efficiency operation for lower power consumption, less noise, and cooler temperatures. This efficiency level reduces waste heat inside tight 1U spaces and supports the fan's ability to remain off under light loads. Verify that your chassis accepts a 1U ATX power supply and that 400W meets the total system draw before purchasing.

Points forts

  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency lowers power draw and heat
  • Fan stops at low loads for silent running
  • Resonant LLC plus DC-to-DC gives clean, stable power
  • Compact 1U ATX form factor delivers 400 W

Caractéristiques

TypeATX

Questions sur cet article

What form factor does the FSP400-701US need to fit in my case?

This is a 1U ATX power supply, so it requires a chassis with a 1U PSU mounting bay.

How do I enable the Zero RPM fan mode on the FSP400-701US?

The fan stops automatically at low and medium loads; no manual switch or software setting is required.

When should I expect to replace the fan in this 400W unit?

The fan only spins under higher loads, which reduces wear and extends its service life significantly.

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