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Compact 1U silver ATX power supply unit with rear fan grille

KHACHIMO

KHACHIMO API3FS43 1U 500W ATX Power Supply

SKU CH-6M7R-JXFYC

1U ATX power supply delivering 500W with 80 PLUS Gold efficiency, Modern Standby support, zero-RPM fan mode and resonant LLC topology for clean, quiet power

  • TypeATX
  • Modern Standby compatible for extremely fast wake-from-sleep
  • 80 PLUS Gold certified for high efficiency and lower power consumption
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and reduces coil whine
  • 1U form factor fits compact server and rackmount chassis

1U 500W ATX Power Supply

The KHACHIMO API3FS43 is a compact 1U form factor power supply delivering 500W of ATX power. It fits space-constrained server chassis and workstations where height is limited but reliable output is required. 80 PLUS Gold certification ensures high efficiency across typical loads.

Modern Standby and zero-RPM upgrade

This unit replaces older 1U supplies that lack Modern Standby support or semi-passive cooling. The jump is worthwhile when fast wake-from-sleep times and silent low-load operation matter for always-on or frequently sleeping systems. Resonant LLC topology with DC-to-DC conversion improves voltage regulation over basic designs.

500W headroom for dense builds

The 500W capacity comfortably handles multi-core CPUs, storage arrays and single-GPU configurations in 1U enclosures. Efficiency peaks near 50 percent load, keeping temperatures and fan noise low. Systems demanding sustained loads above the rated output or multiple high-power GPUs will exceed its headroom.

Highlights

  • Modern Standby compatible for extremely fast wake-from-sleep
  • 80 PLUS Gold certified for high efficiency and lower power consumption
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and reduces coil whine
  • 1U form factor fits compact server and rackmount chassis

Specifications

TypeATX

Questions about this item

What clearance does the 1U 500W ATX power supply need to fit in a rack?

The unit occupies a single 1U rack height and uses a standard ATX mounting pattern, so it fits any chassis or rack shelf that accepts a 1U ATX supply.

Which step is often missed when installing the API3FS43 into a server?

Many installers forget to engage the Modern Standby pin on the main ATX connector; without it the fast wake-from-sleep and low-load efficiency features will not activate.

When should the cooling fan be checked or replaced on this 500W unit?

Because Zero RPM Fan Mode keeps the fan off at low and medium loads, inspect the fan bearings during routine server maintenance and replace it if noise appears or airflow drops under heavy load.

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