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Rectangular silver ATX power supply unit with black fan grille and modular cable sockets

KHACHIMO

KHACHIMO U1A-D10550-DRB 550W ATX power supply

SKU CH-JB2J-ZT081

An ATX power supply delivering 550 W with 80 PLUS Gold efficiency, Modern Standby support, a Zero RPM fan mode and resonant LLC topology with DC-to-DC conversion

  • TypeATX
  • Modern Standby gives fast wake times and better low-load efficiency
  • 80 PLUS Gold certification means high efficiency for lower power use and cooler temps
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and reduces coil whine
  • 550W ATX output powers standard desktop builds reliably

550W ATX power supply

The KHACHIMO U1A-D10550-DRB is a 550W ATX power supply designed for desktop systems that require reliable, efficient power delivery. It carries an 80 PLUS Gold certification for high efficiency and supports Modern Standby for fast wake-from-sleep performance.

Modern Standby and quiet operation

This unit replaces older ATX supplies that lack Modern Standby support or operate with constant fan noise. The upgrade is worthwhile when a system needs fast sleep-wake cycles, lower idle power draw, and near-silent operation under typical loads.

Office PCs and quiet builds

It suits office workstations, home desktops, and noise-sensitive environments where efficient low-load performance and zero-fan idle are priorities. Builders targeting high-wattage multi-GPU configurations or extreme overclocking headroom should consider higher-capacity alternatives.

Highlights

  • Modern Standby gives fast wake times and better low-load efficiency
  • 80 PLUS Gold certification means high efficiency for lower power use and cooler temps
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and reduces coil whine
  • 550W ATX output powers standard desktop builds reliably

Specifications

TypeATX

Questions about this item

Does this ATX unit fit a standard ATX case cut-out?

Yes, the U1A-D10550-DRB is an ATX form-factor power supply and mounts in any case with a standard ATX PSU opening.

What is the main installation step people miss when enabling Modern Standby?

Connect the 24-pin ATX and 8-pin EPS cables, then enable Modern Standby in the motherboard BIOS so the PSU can enter its low-power sleep states.

When should the cooling fan be cleaned to keep Zero RPM mode effective?

Clean the fan intake once a year; dust buildup raises internal temperatures and prevents the fan from staying off at low and medium loads.

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