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Rectangular ATX power supply unit, matte black finish with cooling fan visible

KHACHIMO

KHACHIMO SMQ300PS15-C 15V 300W Power Supply

SKU CH-RAWW-9RV42

An ATX unit delivering 300 W at 15 V with 80 PLUS Gold efficiency, Modern Standby support, a Zero RPM fan mode and resonant LLC topology for clean power and quiet operation

  • TypeATX
  • Modern Standby compatibility enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 15 V 300 W output supplies stable power for demanding components

300W ATX PSU for modern standby PCs

The KHACHIMO SMQ300PS15-C delivers 300W of continuous power through a standard ATX form factor. It targets system builders who need efficient, quiet energy delivery for modern standby compatible motherboards. The 15V primary rail supports contemporary low-power platforms and compact workstations.

Sustained load behaviour with Gold efficiency

80 PLUS Gold certification means the unit maintains high efficiency across typical operating ranges, reducing waste heat during long work sessions. Resonant LLC topology with DC-to-DC conversion keeps voltage regulation tight when components draw steady current. The fan remains off at low and medium loads, eliminating acoustic distraction during extended idle or light productivity periods.

Build quality and connector implications

Zero RPM fan mode relies on a semi-passive cooling design that only spins up when thermal thresholds demand it, preserving bearing life. Modern standby compatibility ensures the PSU enters and exits low-power sleep states quickly without voltage instability. ATX mounting points and standard cable routing fit mainstream chassis, while the Gold-rated internals suggest quality capacitors and a layout optimised for clean power delivery.

Points forts

  • Modern Standby compatibility enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 15 V 300 W output supplies stable power for demanding components

Caractéristiques

TypeATX

Questions sur cet article

How loud and hot does the 300 W unit get during all-day use?

The 80 PLUS Gold certification means high efficiency, so less waste heat and lower fan speeds. Zero RPM mode stops the fan completely at low and medium loads for near-silent running.

What must my build already have for this ATX power supply to work?

Your case needs an ATX PSU bay and your motherboard a standard 24-pin ATX socket plus the required CPU power connector; the PSU also provides PCIe and peripheral cables for graphics cards and drives.

Will the Modern Standby feature work with my older motherboard that only supports traditional sleep states?

Modern Standby needs a compatible motherboard and OS; on older hardware the PSU will still deliver clean power via its LLC resonant topology and DC-to-DC design, but the fast wake and deep low-power states will not be available.

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