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Rectangular metal ATX power supply unit with matte black finish and rear fan grille

KHACHIMO

KHACHIMO ST-302UP 300W ATX power supply

SKU CH-XNM4-TCN90

An ATX power supply delivering 300 W with 80 PLUS Gold efficiency, Modern Standby support and a zero-RPM fan mode for silent low-load operation

  • TypeATX
  • Modern Standby support enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 300 W ATX output powers standard desktop builds reliably

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.

Highlights

  • Modern Standby support enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 300 W ATX output powers standard desktop builds reliably

Specifications

TypeATX

Questions about this item

What does the 300 W rating mean for my build?

The unit can deliver up to 300 W of continuous power, enough for a basic office PC or low-power workstation with integrated graphics.

How does the 80 PLUS Gold certification affect daily use?

It means the supply runs at high efficiency across typical loads, so you draw less mains power, generate less heat and keep fan noise lower.

Will the ST-302UP fit in a standard ATX case?

Yes, it follows the ATX form factor and uses the standard 24-pin motherboard connector, so it mounts in any regular ATX chassis.

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