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Rectangular black metal ATX power supply unit with ventilation grille and label

KHACHIMO

KHACHIMO W510 W520 300W power supply DPS-300AB-56 A

SKU CH-KX8J-9XSV7

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

  • TypeATX
  • Fast wake-ups with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops at low load for silent running
  • LLC resonant topology with DC-to-DC for clean power
  • 300 W ATX unit fits W510 and W520 systems

300W ATX Power Supply

The KHACHIMO W510 W520 unit delivers 300 watts of continuous power through a standard ATX form factor. It suits office desktops, small-form-factor builds and basic home systems that require reliable energy delivery without excess capacity. The 80 PLUS Gold certification ensures high efficiency across typical workloads, reducing electricity draw and heat output. This supply fits directly into chassis designed for ATX power units.

Upgrade from Lower-Efficiency Units

Replacing an older bronze-rated or uncertified power supply brings measurable gains in efficiency and acoustic comfort. The resonant LLC topology with DC-to-DC conversion provides cleaner voltage regulation, which benefits modern components sensitive to ripple. The jump is worth it when the existing unit struggles with Modern Standby sleep states or exhibits coil whine under light loads. Systems lacking zero-fan capability gain silent operation at idle.

Sustained Load Behaviour

Under continuous demand the Gold-rated platform maintains its efficiency targets, keeping internal temperatures lower than less certified designs. The cooling fan remains off during low and medium loads thanks to the zero RPM mode, activating only when thermal thresholds require active airflow. Resonant LLC operation minimises coil whine even when the unit runs for extended periods. Modern Standby compatibility ensures the supply enters and exits deep sleep states cleanly during prolonged idle intervals.

Highlights

  • Fast wake-ups with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops at low load for silent running
  • LLC resonant topology with DC-to-DC for clean power
  • 300 W ATX unit fits W510 and W520 systems

Specifications

TypeATX

Questions about this item

Does this 300W ATX unit use standard mounting holes for a typical case?

Yes, the ATX form factor uses the standard four-hole mounting pattern found on most desktop chassis.

Which power cables must be connected for the motherboard and CPU on this DPS-300AB-56 A?

Attach the 24-pin ATX connector to the motherboard and the 4+4-pin EPS connector to the CPU socket; both are fixed cables on this unit.

How should the fan intake be kept clear to maintain the Zero RPM Fan Mode?

Ensure the case vent or dust filter in front of the PSU fan remains unobstructed so the fan can spin freely when load increases.

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