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Compact 1U 500W ATX power supply unit with matte metal casing and rear fan grille

KHACHIMO

KHACHIMO 1U 500W ATX Power Supply P1H-5500V

SKU CH-W3E1-HBA87

A 500W ATX unit with 80 PLUS Gold efficiency, Modern Standby support, Zero RPM fan mode and resonant LLC topology for clean, quiet power delivery

  • TypeATX
  • Modern Standby support gives extremely fast wake-from-sleep times and better low-load efficiency
  • 80 PLUS Gold certification delivers high efficiency operation for lower power consumption, less noise, and cooler temperatures
  • Zero RPM fan mode stops the cooling 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
  • 500 W ATX output powers compact 1U systems with reliable performance

1U 500W ATX Power Supply

The KHACHIMO P1H-5500V is a 1U form-factor ATX power supply delivering 500W of power. It targets system builders assembling compact servers or workstations where rack height is constrained. The unit carries 80 PLUS Gold certification for high efficiency across typical loads.

Suited for dense rack builds, not high-wattage GPUs

This supply fits 1U chassis that require Modern Standby compatibility for rapid wake times and low-load efficiency. Zero RPM fan mode keeps acoustics minimal during light workloads. Builders needing more than 500W for multi-GPU configurations or extreme overclocking should look at higher-capacity units.

80 PLUS Gold efficiency with LLC resonant topology

The resonant LLC topology combined with DC-to-DC conversion delivers clean, stable voltage regulation and reduces coil whine. This architecture also supports deeper sleep states for improved power savings. The 80 PLUS Gold rating confirms high efficiency under standard operating conditions.

Highlights

  • Modern Standby support gives extremely fast wake-from-sleep times and better low-load efficiency
  • 80 PLUS Gold certification delivers high efficiency operation for lower power consumption, less noise, and cooler temperatures
  • Zero RPM fan mode stops the cooling 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
  • 500 W ATX output powers compact 1U systems with reliable performance

Specifications

TypeATX

Questions about this item

Does this 1U 500W unit fit a standard ATX mounting pattern?

Yes, it uses the ATX form factor so the screw-hole pattern matches standard ATX chassis cut-outs.

What is the correct way to enable the Zero RPM fan mode?

The fan stops automatically at low and medium loads; no BIOS or software setting is required.

When should the internal fan be cleaned or replaced?

Clean dust from the fan intake whenever it becomes audible; replace the fan only if it fails to spin under load.

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