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

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.