KHACHIMO SPI400PFB 400W ATX 80 PLUS Gold power supply

400W ATX Gold power supply for quiet builds

The KHACHIMO SPI400PFB delivers 400W of continuous power through a standard ATX form factor. Its 80 PLUS Gold certification ensures high efficiency across typical loads, reducing waste heat and electricity draw. Modern Standby compatibility allows near-instant wake times for systems that use low-power sleep states. This unit suits office workstations, compact home PCs, or upgrades where low noise and efficiency matter more than extreme wattage.

Straightforward ATX fit with semi-passive cooling

Installation follows the usual ATX mounting pattern and uses a conventional 24-pin motherboard connector alongside CPU and peripheral cables. The Zero RPM fan mode keeps the fan completely stopped at low and medium loads, so cable routing near the intake is rarely critical. Builders should verify that their case allows bottom or top mounting with adequate airflow when the fan does spin up under heavier demand. No specialised tools or adapters are required beyond a standard Phillips screwdriver.

Steady output with resonant LLC and DC-to-DC design

Under sustained load the resonant LLC topology combined with DC-to-DC conversion maintains tight voltage regulation and low ripple, limiting coil whine even during long sessions. The Gold-rated efficiency curve keeps internal temperatures moderate, allowing the fan to remain off longer or spin slowly when active. This behaviour supports consistent performance for productivity workloads, media playback, or light gaming without thermal throttling or audible distraction.