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Compact 1U ATX power supply unit with matte black finish and rear fan grille

KHACHIMO

KHACHIMO 1U 300W ATX Power Supply P1S-5300V P1S-5180V P1S-5220V

SKU CH-67YZ-XAFFT

A 300 W ATX supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for fast sleep wake-up

  • Product typeATX
  • Fast wake and efficient sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops at low loads for near-silent running
  • Resonant LLC and DC-to-DC design deliver clean, stable power
  • 300 W ATX output fits 1U compact chassis

Compact 1U ATX Power Supply

The KHACHIMO 1U 300W ATX power supply fits slim chassis that require a standard ATX connector layout in a reduced height. It delivers 300W of continuous power and carries 80 PLUS Gold certification for high efficiency across typical loads. Modern Standby compatibility allows extremely fast wake-from-sleep transitions and improved low-load efficiency. Resonant LLC topology with DC-to-DC conversion supplies clean, consistent power while reducing coil whine.

Suited for space-constrained builds.

This unit suits small-form-factor workstations, embedded appliances, or 1U servers that need quiet, efficient power within a tight vertical profile. The Zero RPM fan mode keeps acoustics near silent at low and medium loads. Builders planning multi-GPU configurations, high-wattage CPUs, or heavy peripheral counts should look at higher-capacity power supplies because the 300W limit will not support those demands.

Verify chassis height

Confirm the case or rackmount enclosure accepts a 1U form-factor power supply and provides the required ATX power connectors for your motherboard and drives. Ensure the total system power draw stays within the 300W rating to maintain stable operation. Check that the physical mounting holes and AC inlet orientation match the host chassis.

How it compares

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

Price $184.99
Pricier than about 60% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

Does my motherboard need a specific ATX connector for the P1S-5300V to power on?

The unit uses a standard ATX connector, so any motherboard with a matching 24-pin socket will power on.

Will the Zero RPM Fan Mode still engage if I pair this supply with an older CPU that idles at higher wattage?

The fan remains off at low and medium loads; a CPU that draws more power at idle may keep the load above the Zero RPM threshold.

How can I confirm the 80 PLUS Gold efficiency is active after installing the P1S-5220V?

The supply runs cooler and the fan stays off longer under light loads, which is the audible sign of Gold-level efficiency in action.

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