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

KHACHIMO

KHACHIMO HSP300-S12D 300W power supply

SKU CH-XKMF-GJCEP

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

  • TypeATX
  • Faster wake from sleep with Modern Standby support
  • Lower power draw and heat via 80 PLUS Gold efficiency
  • Silent low-load operation with Zero RPM fan mode
  • Clean, stable power from LLC resonant topology with DC-to-DC
  • 300 W ATX output on a 12 V rail

ATX 300W power supply for modern standby systems

The KHACHIMO HSP300-S12D is a 300W ATX power supply built for PCs that use Modern Standby sleep states. It delivers fast wake-from-sleep times and high efficiency at low loads. The 80 PLUS Gold certification ensures reduced power draw, lower heat output and quieter running. Its resonant LLC topology with DC-to-DC conversion provides clean, stable voltage rails and helps minimise coil whine.

300W capacity with 80 PLUS Gold efficiency headroom

At 300W the unit comfortably powers mainstream office and home builds with modest graphics requirements. The Gold-rated efficiency keeps waste heat low across typical workloads, giving thermal headroom in compact cases. Systems drawing sustained loads near the 300W limit will leave little reserve for future upgrades or peak spikes. Builders planning high-end GPUs or multi-drive arrays should consider a higher-wattage model.

ATX form factor with zero-RPM fan mode

The standard ATX dimensions fit most mainstream chassis without special brackets. A zero-RPM fan mode stops the fan entirely at low and medium loads for near-silent operation. Under heavier loads the fan spins up to maintain safe temperatures. The Modern Standby compatibility relies on the platform firmware and OS support; older motherboards without the required sleep-state implementation will not benefit from the fast-wake capability.

Points forts

  • Faster wake from sleep with Modern Standby support
  • Lower power draw and heat via 80 PLUS Gold efficiency
  • Silent low-load operation with Zero RPM fan mode
  • Clean, stable power from LLC resonant topology with DC-to-DC
  • 300 W ATX output on a 12 V rail

Caractéristiques

TypeATX

Questions sur cet article

Will this 300W ATX unit fit and power an older motherboard that still uses a 24-pin connector?

Yes, the supply follows the ATX form factor and provides the standard 24-pin main connector, so it is compatible with older boards that use that interface.

How can I confirm the Zero RPM fan mode is actually engaging after installation?

Under light loads the fan should stop spinning completely; you can verify this visually or by listening for the absence of fan noise while the system idles.

What cables come attached to the HSP300-S12D and what must I add?

The power supply ships with its fixed ATX 24-pin, CPU and PCIe leads; any additional peripheral cables need to be purchased separately.

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