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Rectangular ATX power supply unit with matte black metal casing and rear cooling fan visible

KHACHIMO

KHACHIMO R320 R420 550W ATX Power Supply

SKU CH-NWHT-YH1G4

ATX 550W unit with 80 PLUS Gold efficiency, Modern Standby support, zero-RPM fan mode and resonant LLC plus DC-to-DC topology for clean, quiet power delivery

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops the fan at low loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean power
  • 550 W ATX capacity for reliable system performance

550W ATX Power Supply

The KHACHIMO R320 R420 is a 550W ATX power supply built with resonant LLC topology and DC-to-DC conversion. It delivers 80 PLUS Gold certified efficiency for lower consumption and cooler operation. Modern Standby compatibility ensures extremely fast wake-from-sleep times. A zero RPM fan mode stops the fan at low and medium loads for near-silent running.

Builders who value quiet, efficient power

This unit suits systems that prioritise low noise and high efficiency at typical loads. The zero RPM mode and Gold rating benefit workstations and home PCs that spend long periods at idle. Builds requiring higher wattage headroom or non-ATX form factors should look at something else.

Fits standard ATX layouts with modern sleep support

The ATX form factor fits standard cases and motherboards without modification. Modern Standby support frees the platform to enter deeper, more energy efficient sleep states. DC-to-DC conversion provides clean, consistent power to components while reducing coil whine.

Punti di forza

  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops the fan at low loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean power
  • 550 W ATX capacity for reliable system performance

Caratteristiche tecniche

TypeATX

Domande su questo articolo

Which motherboard power connectors does this 550 W ATX unit provide for a modern build?

It supplies a 24-pin ATX connector, a 4+4-pin EPS connector for the CPU, and PCIe connectors for graphics cards.

Will the Zero RPM Fan Mode stay off when paired with an older platform that lacks Modern Standby support?

Yes, the fan stops based on actual load and temperature, so it remains silent at low power draw regardless of the motherboard's sleep capabilities.

How can I verify the 80 PLUS Gold efficiency after installation?

Monitor system power draw with a wall meter; at typical loads the unit should draw noticeably less AC power than a non-Gold supply for the same DC output.

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