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

KHACHIMO

KHACHIMO PWS-1K22A-1R 1200W ATX power supply

SKU CH-4SSR-YF712

Delivers 1200W ATX power with 80 PLUS Gold efficiency, Modern Standby compatibility, zero-RPM fan silence and resonant LLC DC-to-DC topology for clean, quiet output

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency lowers power draw and heat
  • Fan stops completely at low to medium loads
  • Resonant LLC topology delivers clean power and reduces coil whine
  • DC-to-DC conversion enables efficient sleep states

1200W ATX power supply for high-output builds

The KHACHIMO PWS-1K22A-1R delivers 1200 watts of continuous power through an ATX form factor. It targets workstations and enthusiast desktops that draw heavy loads from multiple GPUs or dense storage arrays. The unit carries 80 PLUS Gold certification for verified efficiency across the load range.

Sustained load behaviour with LLC resonant topology

Resonant LLC topology paired with DC-to-DC conversion keeps voltage regulation tight during prolonged heavy draws. The design reduces coil whine and maintains stable rails without relying on burst-mode shortcuts. At low and medium loads the fan stops completely thanks to Zero RPM mode, cutting acoustic output to near zero.

Practical limits of the ATX interface

The ATX connector set and 1200W ceiling define the upper boundary for multi-GPU configurations and high-core-count CPUs. Gold-rated efficiency caps waste heat, but the fixed cable bundle and single EPS connector may restrict extreme dual-socket or quad-GPU layouts. Modern Standby support enables rapid wake from sleep without exceeding the platform's low-power state allowances.

Highlights

  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency lowers power draw and heat
  • Fan stops completely at low to medium loads
  • Resonant LLC topology delivers clean power and reduces coil whine
  • DC-to-DC conversion enables efficient sleep states

Specifications

TypeATX

Questions about this item

How loud is the 1200W unit under continuous all-day load?

The Zero RPM fan mode keeps the fan off at low and medium loads for near-silent operation, while the resonant LLC topology with DC-to-DC conversion reduces coil whine for quieter running.

Which power connectors must my build already provide for this ATX supply?

As an ATX power supply it uses the standard 24-pin motherboard connector, 4+4-pin CPU power and PCIe power cables that are included with the unit.

Will this 80 PLUS Gold unit work reliably with older components I keep?

Yes, the ATX form factor and DC-to-DC conversion deliver clean, consistent power compatible with legacy hardware, and Modern Standby support enables efficient sleep states on newer platforms.

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