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Rectangular black ATX power supply unit with fan grille and cable connectors

KHACHIMO

KHACHIMO GCS350PS28 28V 12.5A 350W power supply

SKU CH-HB0M-JH88T

Delivers 350 W at 28 V and 12.5 A with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support

  • TypeATX
  • Modern Standby support for fast wake from sleep
  • 80 PLUS Gold certification delivers high efficiency and cooler running
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC with DC-to-DC topology provides clean power and reduces coil whine
  • 350 W output at 28 V and 12.5 A for demanding builds

350W ATX power supply for Modern Standby systems

The KHACHIMO GCS350PS28 delivers 350 watts of continuous power from a single 28 volt rail rated at 12.5 amps. Built to the ATX form factor it fits standard desktop chassis and carries 80 PLUS Gold certification for high efficiency across typical loads. Resonant LLC topology with DC-to-DC conversion supplies clean, stable voltages while enabling deeper sleep states. Modern Standby compatibility ensures extremely fast wake-from-sleep times and improved low-load efficiency.

Ideal for compact builds that prioritise quiet

This unit suits builders who want near-silent performance at idle and moderate workloads because the Zero RPM fan mode stops the fan completely under light demand. Systems that require multiple high-power graphics cards or sustained loads well above 350 watts should look at higher-capacity models. The fixed 28 volt output design also means it is not a direct replacement for standard multi-rail ATX units that provide 12 volt, 5 volt and 3.3 volt rails.

350 watt capacity with Gold-rated headroom

At 80 PLUS Gold efficiency the supply comfortably handles mainstream CPUs, single mid-range GPUs and several drives while wasting less energy as heat. Continuous output is limited to 350 watts so heavily overclocked configurations or dual-card setups will exceed its capability. The single 28 volt 12.5 amp rail provides up to 350 watts on that rail alone; total system draw must stay within this ceiling for stable operation.

Highlights

  • Modern Standby support for fast wake from sleep
  • 80 PLUS Gold certification delivers high efficiency and cooler running
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC with DC-to-DC topology provides clean power and reduces coil whine
  • 350 W output at 28 V and 12.5 A for demanding builds

Specifications

TypeATX

Questions about this item

Does this 350W ATX unit need any extra cables or connectors beyond what comes in the box?

It is a standard ATX power supply so it uses the usual motherboard, CPU and peripheral cables that ship with the unit; no separate purchase is required.

Will the Zero RPM fan mode still work if I keep my older motherboard that lacks Modern Standby support?

Yes, the fan stops at low and medium loads based on the power supply's own thermal curve, independent of the motherboard's sleep-state capabilities.

How can I verify the 80 PLUS Gold efficiency is actually being met after installation?

Use a wall power meter to compare AC input against the DC load reported by your monitoring software; the ratio should stay within Gold-class limits at typical loads.

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