We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular ATX power supply unit in matte black finish with cooling fan grille visible

KHACHIMO

KHACHIMO 28V 12.5A 300W ATX Power Supply

SKU CH-KY54-SZRT8

An ATX power supply delivering 300 W at 28 V with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support

  • TypeATX
  • Faster wake-from-sleep with Modern Standby support
  • Lower electricity draw thanks to 80 PLUS Gold efficiency
  • Near-silent operation from Zero RPM fan mode
  • Cleaner power delivery via resonant LLC and DC-to-DC design
  • 300 W output at 28 V and 12.5 A for reliable performance

Specialised 28 V ATX Power Supply

This KHACHIMO unit delivers 300 W at 28 V and 12.5 A through an ATX form factor. It is built for systems that require a single high-voltage rail rather than standard desktop voltages. The design targets industrial or embedded platforms where 28 V input is specified.

Suited to 28 V industrial builds, not standard PCs

Ideal for integrators deploying equipment that runs on a 28 V DC bus and needs Modern Standby support. Not for builders assembling conventional desktop PCs that need 12 V, 5 V or other common rails, nor for anyone requiring higher total wattage or multiple output voltages.

80 PLUS Gold efficiency with Zero RPM fan

The supply meets 80 PLUS Gold certification for high efficiency, lower consumption and cooler running. A Zero RPM fan mode stops the fan completely at low and medium loads for near-silent operation. Resonant LLC topology with DC-to-DC conversion provides clean power and reduces coil whine.

Highlights

  • Faster wake-from-sleep with Modern Standby support
  • Lower electricity draw thanks to 80 PLUS Gold efficiency
  • Near-silent operation from Zero RPM fan mode
  • Cleaner power delivery via resonant LLC and DC-to-DC design
  • 300 W output at 28 V and 12.5 A for reliable performance

Specifications

TypeATX

Questions about this item

How can I confirm the 300W unit is running correctly after installation?

The fan stays off at low and medium loads thanks to Zero RPM mode, and the 80 PLUS Gold rating means high efficiency with less heat and noise during normal use.

What comes in the box and what must I buy separately?

The ATX power supply itself is included; any required ATX, CPU or PCIe cables that are not attached must be sourced separately.

Which 28V 12.5A version should I choose for my build?

The RFB300-48S28-5-A model delivers 300W at 28V 12.5A with Modern Standby support, 80 PLUS Gold efficiency and resonant LLC topology with DC-to-DC conversion.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.