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Silver 1U ATX power supply unit with rear fan grille and cable bundle

KHACHIMO

KHACHIMO 1U 400W ATX Power Supply DPS-400BB A

SKU CH-GQNG-ETQFN

A 400W ATX power supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for fast wake times and silent low-load operation

  • TypeATX
  • Modern Standby support enables extremely fast wake-from-sleep and better low-load efficiency
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption, less noise and cooler temperatures
  • Zero RPM fan mode stops the cooling fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 400W ATX power supply in a 1U form factor for compact server and workstation builds

KHACHIMO 1U 400W ATX Power Supply

The KHACHIMO DPS-400BB A is a 1U form-factor ATX power supply rated at 400W. It targets system integrators and builders assembling compact servers, rackmount appliances or space-constrained workstations where a slim profile is mandatory. Its Modern Standby compatibility makes it suitable for deployments that demand rapid wake-from-sleep responsiveness. Buyers needing higher wattage for multi-GPU configurations or full-size ATX chassis should look elsewhere.

Build quality and connector implications

The unit carries 80 PLUS Gold certification, indicating high efficiency across typical load ranges and reduced waste heat inside tight enclosures. A resonant LLC topology with DC-to-DC conversion delivers clean, consistent power while minimising coil whine. These design choices support reliable operation in dense racks where airflow is limited and acoustic intrusion must be kept low. The 1U height dictates compatibility only with cases and mounting rails designed for that specific form factor.

Thermals, noise and power draw

Zero RPM fan mode stops the cooling fan entirely at low and medium loads, providing near-silent operation during idle or light workloads. When the fan does engage, the high-efficiency Gold-rated platform keeps internal temperatures lower, allowing slower fan speeds than less efficient units. The combination of efficient topology and intelligent fan control results in cooler running temperatures and reduced acoustic output under normal operating conditions.

Points forts

  • Modern Standby support enables extremely fast wake-from-sleep and better low-load efficiency
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption, less noise and cooler temperatures
  • Zero RPM fan mode stops the cooling fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 400W ATX power supply in a 1U form factor for compact server and workstation builds

Caractéristiques

TypeATX

Questions sur cet article

What does the 80 PLUS Gold certification mean for the DPS-400BB A?

The 80 PLUS Gold certification confirms high-efficiency operation that reduces power consumption, lowers noise output, and keeps temperatures cooler during use.

What physical space does the 1U form factor of the DPS-400BB A require?

The 1U form factor is designed to fit a single rack unit in standard server or compact chassis enclosures.

How does the Zero RPM fan mode work on the DPS-400BB A, and when does the fan actually start?

The fan stays off at low and medium loads for silent operation and only spins up when the load increases beyond those thresholds.

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