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Black rectangular ATX power supply unit with gold efficiency badge

KHACHIMO

KHACHIMO EFRP-G550 550W ATX power supply 80 PLUS Gold

SKU CH-356X-3M3A1

An 80 PLUS Gold ATX unit delivering 550 W with zero-RPM fan mode, Modern Standby support and LLC resonant topology for quiet, efficient power

  • TypeATX
  • 80 PLUS Gold efficiency lowers power draw and heat
  • Zero RPM fan mode keeps the unit silent at low load
  • Resonant LLC with DC-to-DC conversion delivers clean, stable power
  • Modern Standby support enables faster wake-from-sleep times
  • 550 W ATX output handles mainstream gaming and workstation builds

Modern Standby Ready 550W Unit

The KHACHIMO EFRP-G550 is a new ATX power supply rated at 550W with 80 PLUS Gold certification. It targets builders who want high efficiency and quiet operation in a standard desktop system. Modern Standby compatibility ensures fast wake-from-sleep times and improved low-load efficiency. This unit suits mainstream PCs that do not demand extreme wattage.

Replaces Lower-Efficiency or Noisy Units

Swapping out an older or uncertified power supply for this model brings 80 PLUS Gold efficiency, reducing power draw, heat output and fan noise. The upgrade is worthwhile when the current unit lacks Modern Standby support, produces audible coil whine, or spins its fan constantly at idle. Resonant LLC topology with DC-to-DC conversion delivers cleaner power rails and enables deeper sleep states. Builders staying at 550W will notice the difference; systems needing more headroom should look elsewhere.

Fits Standard ATX Builds with Silent Focus

The ATX form factor fits typical desktop cases without special brackets. Zero RPM fan mode stops the fan entirely at low and medium loads for near-silent running, while the LLC resonant design minimises coil whine. Modern Standby support frees the platform to use newer low-power sleep states. Cable routing and connector selection follow standard ATX expectations, so no proprietary adapters are required.

Points forts

  • 80 PLUS Gold efficiency lowers power draw and heat
  • Zero RPM fan mode keeps the unit silent at low load
  • Resonant LLC with DC-to-DC conversion delivers clean, stable power
  • Modern Standby support enables faster wake-from-sleep times
  • 550 W ATX output handles mainstream gaming and workstation builds

Caractéristiques

TypeATX

Questions sur cet article

Will the ATX form factor fit my standard mid-tower case?

The unit follows the ATX form factor, so it mounts in any case designed for standard ATX power supplies using the typical four-screw pattern.

Which cables do I connect for a modern motherboard and GPU, and what is the common mistake?

Attach the 24-pin main connector, the 8-pin (4+4) CPU cable, and the PCIe cables your graphics card requires; the frequent error is leaving the CPU 8-pin partially seated, which prevents boot.

How do I keep the Zero RPM fan mode working quietly over the years?

Vacuum dust from the intake grill and fan blades every few months; a clogged grill forces the fan to spin earlier and louder, defeating the semi-passive design.

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