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Black ATX power supply unit with gold certification badge and cooling fan visible

KHACHIMO

KHACHIMO Power Supply 300W ATX 80 PLUS Gold 05-10041-601

SKU CH-RY2K-Y8HFZ

A 300 W ATX power supply for PRT and PSA300R-PFC systems with 80 PLUS Gold efficiency, Modern Standby support, Zero RPM fan mode and resonant LLC topology with DC-to-DC conversion

  • Product typeATX
  • Fast wake-from-sleep with Modern Standby compatibility
  • Lower power draw and cooler running thanks to 80 PLUS Gold efficiency
  • Near-silent operation at typical loads via Zero RPM fan mode
  • Clean, stable power delivery from resonant LLC topology with DC-to-DC conversion
  • 300 W ATX power supply built for reliable system performance

300 W ATX power supply

This 300 W ATX unit is built for compact desktops and small-form-factor workstations that require reliable, efficient power delivery. It suits system integrators and DIY builders who need a Gold-rated supply in a standard ATX footprint.

Modern Standby and zero-RPM operation

Modern Standby compatibility enables extremely fast wake-from-sleep times and better low-load efficiency. The zero-RPM fan mode keeps the cooling fan off at low and medium loads for near-silent operation, while resonant LLC topology with DC-to-DC conversion provides clean power and reduces coil whine.

Replaces older 300 W units

This supply replaces legacy 300 W ATX units that lack 80 PLUS Gold certification and Modern Standby support. The upgrade is worth it when lower power consumption, quieter operation, and faster sleep-state transitions are priorities for the build.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $294.99
Pricier than about 77% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

What ATX form factor does this 300W power supply use?

It follows the standard ATX layout, so it fits any case designed for a regular ATX unit.

What physical mounting points does the PSU require?

Four rear mounting screws on the standard ATX bolt pattern secure it to the case.

How do you enable the Zero RPM fan mode after installation?

The mode activates automatically at low and medium loads; no BIOS or software setting is needed.

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