KHACHIMO ST-400IS 400W ATX power supply

400W ATX Power Supply for Compact Systems

This 400W ATX power supply is built for small-form-factor PCs such as NAS or HTPC units. It carries 80 PLUS Gold certification for high efficiency and lower heat output. Modern Standby support enables extremely fast wake-from-sleep times and improved low-load efficiency. A resonant LLC topology with DC-to-DC conversion delivers clean, consistent power while reducing coil whine.

Suitable for Low-Power Builds Needing Quiet

The unit suits builders who want near-silent performance at typical loads thanks to a Zero RPM fan mode that stops the fan entirely at low and medium loads. It is not intended for configurations that require higher total output or additional power connectors beyond what this design provides. Systems with power-hungry discrete graphics cards or many drives should look at higher-capacity units.

80 PLUS Gold Efficiency Rating

The single specification that decides fit is the 80 PLUS Gold certification, which guarantees high efficiency across the load range for lower power consumption, less noise and cooler temperatures. This rating confirms the supply meets strict efficiency targets without needing to reference any other metric.