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Rectangular black ATX power supply unit with cooling fan grille and power connectors

KHACHIMO

KHACHIMO 550W 80 PLUS Gold ATX power supply EFRP-553V1

SKU CH-GVBN-SJVST

ATX power supply delivering 550 watts with 80 PLUS Gold efficiency, zero-RPM fan mode for silent low-load operation, and Modern Standby support for fast wake times

  • TypeATX
  • Faster wake from sleep with Modern Standby support
  • Lower running costs through 80 PLUS Gold efficiency
  • Silent low-load operation via Zero RPM fan mode
  • Clean, stable power from resonant LLC with DC-to-DC
  • Cooler, quieter system thanks to high-efficiency design

KHACHIMO 550W ATX power supply

The KHACHIMO EFRP-553V1 delivers 550 watts of continuous power for standard desktop builds. It suits users assembling a new system or replacing an older unit with a modern, efficient design. The ATX form factor fits most mainstream cases and motherboards. This unit targets builders who value quiet operation and lower electricity draw.

Thermals noise and power draw

80 PLUS Gold certification means high efficiency across typical loads, reducing waste heat and keeping internal temperatures lower. Zero RPM fan mode stops the fan completely at low and medium loads for near-silent operation. Resonant LLC topology with DC-to-DC conversion provides clean power and reduces coil whine. Modern Standby compatibility improves low-load efficiency and wake times.

Upgrade path and when it matters

This supply replaces older, less efficient units that lack Gold-rated efficiency or semi-passive cooling. The jump is worth it when building a system that idles often or runs quiet workloads, because the fan can stay off and power draw drops. It is not for builders who need higher wattage for multi-GPU configurations or extreme overclocking headroom. It also does not suit systems requiring non-ATX form factors or proprietary connectors.

Highlights

  • Faster wake from sleep with Modern Standby support
  • Lower running costs through 80 PLUS Gold efficiency
  • Silent low-load operation via Zero RPM fan mode
  • Clean, stable power from resonant LLC with DC-to-DC
  • Cooler, quieter system thanks to high-efficiency design

Specifications

TypeATX

Questions about this item

How do I install the KHACHIMO EFRP-553V1 in a standard ATX case and what step is often missed?

Mount the unit with the four case screws, connect the 24-pin ATX and CPU power cables, then enable Modern Standby in the BIOS so the fast wake-from-sleep feature actually works.

What maintenance will the KHACHIMO 550W unit need over its lifetime?

The Zero RPM Fan Mode keeps the fan off at low loads, so dust builds up slowly; vacuum the intake grill once a year and the fan bearings will last the unit's life.

What limit appears first when the EFRP-553V1 runs at high load for a long period?

The 80 PLUS Gold efficiency target means waste heat rises above 550 W output; the protection circuit will shut the unit down before components overheat.

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