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Rectangular black ATX power supply unit with fan grille

KHACHIMO

KHACHIMO GPS-300AB-300C 300W ATX power supply

SKU CH-VMB8-0S04V

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

  • TypeATX
  • Modern Standby compatibility enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption and cooler operation
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent running
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 300W ATX output with -5V and -12V rails supports legacy and industrial equipment

300W ATX Power Supply for Modern Standby Systems

This 300W ATX unit is built for PCs that use Modern Standby sleep states and demand high efficiency. It suits compact workstations or quiet home rigs where low power draw and silent idle are priorities.

Check ATX Fit and Connector Needs

Verify the chassis accepts a standard ATX form-factor supply and that the motherboard power connectors match your build. Ensure the total system load stays within the 300W rating and that any -5V or -12V rails required by legacy expansion cards are present.

Replaces Older ATX Units Without Gold Efficiency

Swapping out a non-certified or Bronze-rated ATX supply upgrades efficiency to 80 PLUS Gold, cuts idle noise via Zero RPM fan mode, and adds Modern Standby support. The jump is worth it when building or refreshing a system that sleeps frequently and values low heat output.

Highlights

  • Modern Standby compatibility enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption and cooler operation
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent running
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 300W ATX output with -5V and -12V rails supports legacy and industrial equipment

Specifications

TypeATX

Questions about this item

Does the unit ship with the ATX power cable and mounting screws, or must they be sourced separately?

The power supply includes the standard ATX connector set and mounting hardware; no extra cables or screws are required for a typical installation.

Should I choose the 300 W model or a higher-wattage version for a build with modern standby and low idle draw?

The 300 W rating matches the GPS-300AB-300C; select it when the total system draw stays within that limit, as the unit already supports modern standby and 80 PLUS Gold efficiency.

What does the 80 PLUS Gold badge mean for daily power draw and heat once the PSU is installed?

It certifies at least 80 % efficiency at typical loads, so the system draws less wall power and produces less heat, while the zero-RPM fan mode keeps noise low at idle.

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