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

KHACHIMO

KHACHIMO 300W ATX power supply 12Pin D15-300P1A

SKU CH-C8RT-C8BXF

ATX power supply delivering 300 W with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby compatibility

  • Product typeATX
  • Faster wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stays off at low loads for silent running
  • Resonant LLC plus DC-to-DC delivers clean, stable power
  • ATX form factor fits standard desktop cases

300W ATX PSU with 12-pin connector

The KHACHIMO D15-300P1A is a 300-watt ATX power supply designed for systems that require a compact 12-pin power connector. It carries 80 PLUS Gold certification, meaning it meets high efficiency targets across typical loads. Modern Standby compatibility enables extremely fast wake-from-sleep times and improved low-load efficiency. Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power while reducing coil whine.

Suitable for small-form-factor or OEM-style builds

This unit suits builders assembling compact desktops or replacing proprietary units that use a 12-pin main connector and demand Gold-level efficiency at 300 watts. The zero RPM fan mode keeps acoustics near silent at low and medium loads. It is not for systems needing higher continuous wattage, multiple PCIe power cables, or standard 24-pin ATX motherboard headers. Buyers who want modular cabling or server-grade redundancy should look elsewhere.

300 watts continuous with Gold headroom

At 300 watts the supply comfortably handles mainstream CPUs and mid-range graphics cards within its rated output. The Gold-rated platform provides efficiency headroom that lowers heat and fan speed during typical workloads. It runs out when a build demands more than 300 watts combined load or requires additional 6-pin or 8-pin PCIe connectors not present on this model. Peak demands above the rated figure will trigger protection shutdown.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $51.99
Cheaper than about 90% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

What motherboard power connector does the 12Pin D15-300P1A require?

The unit uses a 12-pin ATX connector, so the motherboard must provide a matching 12-pin socket or an adapter that converts the board's 24-pin header.

Will the 300 W output and Gold efficiency work with older components that draw less power?

Yes, the 300 W capacity and 80 PLUS Gold rating deliver clean, efficient power even at the low loads typical of legacy hardware.

How can I confirm the Zero RPM Fan Mode is active after installation?

At low and medium loads the cooling fan stops completely; listen for silence while the system idles to verify the mode is working.

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