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Silver rectangular ATX power supply unit with ventilation grille and power socket

KHACHIMO

KHACHIMO ST-500IS 500W ATX Power Supply

SKU CH-H02C-R84HB

500 W ATX power supply with 80 PLUS Gold efficiency, Zero RPM fan mode for silent low-load operation, and Modern Standby compatibility for fast wake times

  • TypeATX
  • Faster wake from sleep with Modern Standby support
  • Lower energy draw thanks to 80 PLUS Gold efficiency
  • Silent running at light loads via Zero RPM fan mode
  • Clean, stable power from resonant LLC and DC-to-DC design
  • Reduced coil whine for quieter operation

Compact 500W ATX for Small Systems

The KHACHIMO ST-500IS is a 500W ATX power supply built for compact chassis such as ITX, 1U and small-form-factor NAS or HTPC builds. It carries 80 PLUS Gold certification and Modern Standby compatibility for fast wake times and improved low-load efficiency.

Suited for Space-Constrained Builds

This unit fits small cases and low-profile enclosures where a standard ATX PSU would not install. Builders needing higher wattage for multi-GPU configurations or full-size tower workstations should consider a larger capacity model.

Steady Output Under Continuous Load

Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power during sustained operation while reducing coil whine. The Zero RPM fan mode keeps the fan off at low and medium loads, so noise stays minimal even during extended use.

Pluspunten

  • Faster wake from sleep with Modern Standby support
  • Lower energy draw thanks to 80 PLUS Gold efficiency
  • Silent running at light loads via Zero RPM fan mode
  • Clean, stable power from resonant LLC and DC-to-DC design
  • Reduced coil whine for quieter operation

Specificaties

TypeATX

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What motherboard power connectors does the ST-500IS require to power on?

The ST-500IS uses standard ATX 24-pin and CPU 4/8-pin connectors; your motherboard must provide matching sockets for the unit to deliver power.

Will the 80 PLUS Gold efficiency and DC-to-DC design work reliably with an older platform that only supports traditional S3 sleep?

Yes, the resonant LLC topology with DC-to-DC conversion supplies clean power on legacy S3 systems, while the Gold rating still reduces waste heat and fan noise at typical loads.

How can I confirm the Zero RPM fan mode is active after building the system?

With the system idle or under light load, listen for the PSU fan — it should remain completely stationary until the internal temperature rises past the fan-start threshold.

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