KHACHIMO FSP400-60WS1 400W ATX power supply

Compact 400W ATX supply for space-constrained builds

The KHACHIMO FSP400-60WS1 is a 400W ATX power supply designed for compact 1U chassis and small-form-factor systems. It targets builders who need reliable power in tight enclosures where standard PSU dimensions will not fit. The unit delivers 400W of continuous output suitable for mainstream components.

Fits 1U layouts and enables modern sleep states

This supply requires a chassis with a 1U power supply bay and standard ATX motherboard connectors. Its Resonant LLC topology with DC-to-DC conversion provides clean power rails and supports deeper, more energy efficient sleep states. Modern Standby compatibility allows the system to wake extremely fast from low-power modes. The design frees up internal volume that larger supplies would occupy.

Gold efficiency and silent fan profile reduce heat

80 PLUS Gold certification means high efficiency across typical loads, lowering power draw and waste heat. Zero RPM fan mode stops the cooling fan entirely at low and medium loads for near-silent operation. The same topology that enables efficient sleep states also reduces coil whine. Together these features create a quieter, cooler running system without extra software or accessories.