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Silver rectangular 1U ATX power supply with rear fan grille and side label

KHACHIMO

KHACHIMO SPI250F4BBB 1U 250W ATX power supply

SKU CH-FDDZ-YTGY1

1U 250W ATX power supply with 80 PLUS Gold efficiency, Modern Standby support, Zero RPM fan mode and resonant LLC DC-to-DC topology for quiet, clean power

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • Lower power draw and cooler running with 80 PLUS Gold efficiency
  • Near-silent operation thanks to Zero RPM fan mode
  • Clean, stable power delivery via resonant LLC topology
  • 250 W ATX output in a compact 1U form factor

1U 250W ATX power supply

The KHACHIMO SPI250F4BBB is a 1U form-factor ATX power supply rated at 250W, built for compact servers and slim workstations where rack height is restricted. It targets system integrators who need reliable power in a single rack unit without sacrificing efficiency.

Practical limits of 250W ATX in 1U

A 250W ceiling restricts the unit to low-power CPUs, integrated graphics or entry-level discrete cards; high-core-count processors and multi-GPU configurations will exceed the available headroom. The 80 PLUS Gold rating guarantees high efficiency at typical loads, reducing waste heat that a 1U chassis must dissipate. Modern Standby support enables rapid wake-from-sleep transitions, but only on platforms that implement the corresponding low-power states.

Installation notes

The 1U height fits standard rack rails, yet cable routing can be tight because the short depth leaves little room for stiff ATX and EPS connectors behind the motherboard tray. Zero RPM fan mode eliminates noise at low and medium loads, though the fan will spin under sustained heavy draw — ensure front-to-rear airflow is unobstructed. Resonant LLC topology with DC-to-DC conversion minimises coil whine, but verify that the motherboard's pin-out matches the supply's fixed cables before closing the chassis.

Highlights

  • Fast wake-from-sleep with Modern Standby support
  • Lower power draw and cooler running with 80 PLUS Gold efficiency
  • Near-silent operation thanks to Zero RPM fan mode
  • Clean, stable power delivery via resonant LLC topology
  • 250 W ATX output in a compact 1U form factor

Specifications

TypeATX

Questions about this item

What does the 250 W rating mean for a 1U system build?

The 250 W rating is the maximum continuous power the unit can deliver, suitable for compact 1U chassis with low-power CPUs and minimal add-in cards.

What does 80 PLUS Gold certification mean for daily use?

80 PLUS Gold means the supply meets high efficiency targets at typical loads, reducing power draw, heat output and fan noise during everyday operation.

How does the ATX form factor fit in a 1U rackmount case?

The ATX electrical specification fits the 1U height, providing standard motherboard and peripheral connectors while staying within the slim chassis profile.

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