KHACHIMO ST-302UAG-05E 300W ATX power supply

300W ATX PSU for compact builds

This KHACHIMO ST-302UAG-05E is a 300 watt ATX power supply designed for small form factor or 2U chassis where space and efficiency matter. It carries 80 PLUS Gold certification and supports Modern Standby for rapid wake times and improved low-load efficiency. The resonant LLC topology with DC-to-DC conversion delivers stable voltage regulation and helps reduce coil whine. It suits builders assembling office workstations, home servers or quiet media PCs that do not demand high-wattage graphics cards.

Suited for low-power systems, not for gaming rigs

This unit fits systems running integrated graphics or entry-level discrete cards with modest power draw. Builders planning mid-range or high-end GPUs, multi-drive arrays or heavy overclocking should look elsewhere because the 300 watt limit and connector count will not support those configurations. The 2U form factor also requires a compatible case or rackmount enclosure, so standard ATX tower builders must verify physical fit before purchase.

Zero RPM fan mode enables silent idle

The bundled cooling profile includes a zero RPM fan mode that stops the fan completely at low and medium loads, eliminating noise during typical desktop use or media playback. Modern Standby compatibility allows the PC to enter and exit ultra-low-power sleep states almost instantly, saving electricity without sacrificing responsiveness. Together these features change daily operation by keeping the system near-silent at idle and reducing standby power draw compared to older designs.