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Silver rectangular ATX power supply unit with fan grille and power socket visible

KHACHIMO

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

SKU CH-2AEN-CRYS7

300W ATX power supply with 80 PLUS Gold efficiency, Zero RPM fan mode, Modern Standby compatibility and resonant LLC DC-to-DC topology

  • TypeATX
  • Modern Standby compatible for extremely fast wake-from-sleep
  • 80 PLUS Gold certified for high efficiency and lower power consumption
  • Zero RPM fan mode stops the fan at low loads for silent operation
  • Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power
  • 300 W ATX output in a 2U form factor for compact server builds

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.

Punti di forza

  • Modern Standby compatible for extremely fast wake-from-sleep
  • 80 PLUS Gold certified for high efficiency and lower power consumption
  • Zero RPM fan mode stops the fan at low loads for silent operation
  • Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power
  • 300 W ATX output in a 2U form factor for compact server builds

Caratteristiche tecniche

TypeATX

Domande su questo articolo

What motherboard power connectors does the ST-302UAG-05E need to fit my board?

The unit follows the ATX form factor and supplies the standard 24-pin main connector plus 4/8-pin CPU power for a typical desktop motherboard.

Will the Zero RPM fan mode still engage if I keep an older mechanical hard drive spinning?

Yes, the fan remains off at low and medium loads regardless of drive activity, so legacy storage does not prevent silent operation.

How can I confirm the 80 PLUS Gold efficiency is active after installation?

Monitor idle power draw at the wall; a Gold-rated 300W supply should show very low AC wattage when the system is in Modern Standby sleep.

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