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Rectangular black ATX power supply unit with cooling fan and cable bundle

KHACHIMO

KHACHIMO MH-300N-R3X ATX Power Supply 300W 80 PLUS Gold

SKU CH-SAPH-9X2EF

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

  • TypeATX
  • Faster wake-from-sleep with Modern Standby support
  • Lower power draw and heat via 80 PLUS Gold efficiency
  • Silent running at typical loads thanks to Zero RPM fan mode
  • Stable, clean output from resonant LLC with DC-to-DC design
  • Efficient low-power sleep states enabled by advanced topology

300 W ATX power supply

The KHACHIMO MH-300N-R3X delivers 300 W of continuous power through a standard ATX form factor. It is suited to office PCs, compact workstations or entry-level builds that require reliable, efficient energy delivery without excess capacity. Modern Standby support ensures rapid wake-from-sleep responsiveness for daily productivity tasks. The unit targets users who prioritise low noise and efficiency over high-wattage headroom.

Gold efficiency with semi-passive cooling

80 PLUS Gold certification confirms high conversion efficiency across typical loads, reducing waste heat and electricity cost. A resonant LLC topology paired with DC-to-DC conversion supplies clean, stable rails while minimising coil whine. Zero RPM fan mode stops the cooling fan completely at low and medium loads, providing near-silent operation during light workloads. The combination suits noise-sensitive environments such as home offices or media centres.

Upgrade from basic bronze or unrated units

Replacing a lower-efficiency or group-regulated supply with this model cuts idle power draw and eliminates fan noise at rest. The jump is worthwhile when building a system that spends long periods in Modern Standby sleep or when acoustic comfort matters more than maximum output. Builds requiring multiple high-power GPUs or heavy overclocking headroom should look elsewhere, as the 300 W limit and single EPS connector restrict such configurations.

Punti di forza

  • Faster wake-from-sleep with Modern Standby support
  • Lower power draw and heat via 80 PLUS Gold efficiency
  • Silent running at typical loads thanks to Zero RPM fan mode
  • Stable, clean output from resonant LLC with DC-to-DC design
  • Efficient low-power sleep states enabled by advanced topology

Caratteristiche tecniche

TypeATX

Domande su questo articolo

What does the 80 PLUS Gold rating mean for the 300W output?

The 80 PLUS Gold rating means the unit meets high efficiency targets, reducing waste heat and allowing the fan to stay off longer under typical loads.

What case clearance does the ATX form factor require?

The ATX form factor fits standard ATX cases; verify your chassis lists ATX PSU support and measure depth clearance against the unit's body length.

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

Zero RPM mode activates automatically at low and medium loads; connect the motherboard power cables securely and ensure the fan header is plugged in if the model uses one.

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