KHACHIMO ST-302UP 300W ATX power supply

300W ATX PSU for compact builds

The KHACHIMO ST-302UP is a 300W ATX power supply built for small-form-factor or 2U rackmount systems. It delivers standard ATX power in a chassis suited to space-constrained enclosures. Modern Standby compatibility ensures extremely fast wake-from-sleep transitions and improved low-load efficiency. This unit targets builders who need reliable, efficient power in a reduced-height footprint.

80 PLUS Gold efficiency with Zero RPM mode

The single specification that decides fit is the 80 PLUS Gold certification, which guarantees high efficiency for lower consumption, less noise and cooler temperatures. A Zero RPM fan mode stops the cooling fan entirely at low and medium loads, providing near-silent operation. Resonant LLC topology with DC-to-DC conversion supplies clean, consistent power while reducing coil whine and enabling deeper sleep states.

Suits low-power SFF or rackmount PCs.

This supply suits compact desktops, home servers or 2U appliances running modest processors and integrated graphics. Builders who need more storage drives or expansion cards may still use it if total draw stays within the 300W limit. It is not for systems with discrete graphics cards or multi-core CPUs that push peak demand beyond the rated output.