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Rectangular ATX power supply unit with matte black finish and visible cooling fan grille

KHACHIMO

KHACHIMO ATX 550W 80 PLUS Gold Power Supply

SKU CH-7CQ1-M1BRJ

An ATX 550 W power supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for quiet, low-power sleep and wake

  • TypeATX
  • Faster wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stays off at low loads for silent running
  • Resonant LLC plus DC-to-DC gives clean, stable power
  • 550 W ATX unit built for TDK-Lambda Vega-Lite 550

ATX 550W Gold power supply for modern PCs

The KHACHIMO ATX unit delivers 550 W of continuous power with 80 PLUS Gold efficiency, targeting builders who want lower electricity draw and reduced heat inside the case. It suits standard desktop configurations that do not demand higher wattage headroom. It is not for systems requiring more than 550 W or for redundant server installations.

Practical limits of ATX 550W and 80 PLUS Gold

The 550 W ceiling defines the maximum combined load across all rails, so multi-GPU setups or heavily overclocked CPUs may exceed the available headroom. Gold certification guarantees at least 80 % efficiency at typical loads, yet efficiency still drops at very light or peak loads, meaning some waste heat remains unavoidable. Cable lengths follow the ATX specification, so oversized cases may need extensions.

Build quality, connectors and daily implications

Resonant LLC topology with DC-to-DC conversion supplies tight voltage regulation and helps suppress coil whine during quiet workloads. Zero RPM fan mode stops the fan entirely at low and medium loads, giving near-silent operation during office tasks or media playback. Modern Standby compatibility enables faster wake-from-sleep transitions, though the benefit depends on motherboard and operating-system support.

Highlights

  • Faster wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stays off at low loads for silent running
  • Resonant LLC plus DC-to-DC gives clean, stable power
  • 550 W ATX unit built for TDK-Lambda Vega-Lite 550

Specifications

TypeATX

Questions about this item

Which capacity should I choose for this ATX power supply?

The unit is rated at 550 W, so choose this model when your build needs a 550 W ATX power supply.

What does the 80 PLUS Gold rating mean for daily use?

It certifies high efficiency at typical loads, which reduces power draw, heat output and fan noise compared with lower-rated units.

What interface does this PSU use and what does it limit?

It uses the standard ATX form factor, which fits ATX cases and motherboards and caps the physical size to ATX dimensions.

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