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Rectangular ATX power supply unit in black metal finish with cooling fan visible

KHACHIMO

KHACHIMO 550W ATX Power Supply CAA-550CT A

SKU CH-QGA2-9ZC4Z

Delivers 550 W ATX power with 80 PLUS Gold efficiency, zero-RPM fan mode, Modern Standby support and resonant LLC topology for clean, quiet output

  • TypeATX
  • Faster wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops completely at low loads for silent running
  • LLC resonant topology with DC-to-DC delivers clean stable power
  • 550 W ATX capacity for mainstream builds

Power supply for Modern Standby PCs

The KHACHIMO 550W ATX unit delivers 550 watts of continuous power and is built for systems that use Modern Standby sleep states. It suits office workstations, home desktops and light gaming rigs that need reliable output without excess capacity. Buyers who need more than 550 watts for multi-GPU setups or heavy overclocking should look at higher-rated units.

Thermals, noise and efficiency

An 80 PLUS Gold rating keeps efficiency high across typical loads, reducing waste heat and fan demand. The Zero RPM mode stops the fan completely at low and medium loads, giving near-silent operation during everyday tasks. Resonant LLC topology with DC-to-DC conversion supplies clean power, cuts coil whine and supports deeper sleep states for cooler running.

Build integration

Standard ATX dimensions let the unit drop into most mid-tower and full-tower cases. Modern Standby compatibility enables extremely fast wake-from-sleep times and better low-load efficiency for supported motherboards. The DC-to-DC design simplifies cable routing by consolidating minor rails, freeing space behind the motherboard tray for cleaner airflow.

Highlights

  • Faster wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops completely at low loads for silent running
  • LLC resonant topology with DC-to-DC delivers clean stable power
  • 550 W ATX capacity for mainstream builds

Specifications

TypeATX

Questions about this item

How do I install the KHACHIMO 550W ATX power supply in my case, and what is the common mistake to avoid?

Mount the unit with its fan facing the case vent or bottom grille so it can draw cool air; the mistake is orienting the fan toward a solid panel, which blocks airflow and disables the Zero RPM Fan Mode at low loads.

What maintenance or replacement will the KHACHIMO CAA-550CT A need over time?

Dust the intake grille and fan blades periodically with compressed air to keep the Zero RPM Fan Mode effective; the internal fan is the only moving part and would be the component replaced if bearing noise develops after years of use.

What limit appears first when the KHACHIMO 550W unit runs at high load for extended periods?

Sustained output near the 550W rating increases internal temperature, so the thermal protection circuit is the first limit reached; it will throttle or shut down the supply before components exceed safe operating temperatures.

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