KHACHIMO HK500-12FP S1 400W 500W ATX power supply

ATX power supply for modern standby systems

This new ATX unit delivers a continuous 400 W rating with a 500 W peak capacity, making it suitable for mainstream desktop builds that rely on fast sleep and wake cycles. The design targets users who want efficient, quiet power without stepping up to higher-wattage enthusiast models.

Sustained load efficiency and thermal behaviour

80 PLUS Gold certification means the supply maintains high efficiency across typical workloads, reducing waste heat and keeping internal temperatures lower during extended use. Resonant LLC topology with DC-to-DC conversion provides stable voltage regulation under continuous demand while minimising coil whine.

Practical limits of the ATX interface

The 400 W continuous ceiling defines the maximum reliable draw for components connected through standard ATX connectors, so configurations with multiple high-power GPUs or heavy overclocking headroom fall outside its design envelope. Zero RPM fan mode operates only while load remains within the low-to-medium range where passive cooling suffices.