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Silver rectangular ATX power supply unit with ventilation grille and fan visible

KHACHIMO

KHACHIMO HK353-11UEP 250W ATX power supply

SKU CH-WNGR-GMTDN

A 250W ATX power supply with 80 PLUS Gold efficiency, Modern Standby support, a zero-RPM fan mode and resonant LLC topology with DC-to-DC conversion

  • TypeATX
  • Modern Standby compatible for fast wake-from-sleep
  • 80 PLUS Gold certified for lower power consumption and heat
  • Zero RPM fan mode stops the fan at low loads
  • Resonant LLC with DC-to-DC topology delivers clean, consistent power
  • 250 W ATX power supply in a 1U form factor

Compact 1U form factor

The KHACHIMO HK353-11UEP is a 250W ATX power supply built in a 1U chassis for space-constrained systems. It targets builders assembling slim desktops or rack-mounted servers who need reliable power delivery without the height of a standard PSU. Modern Standby compatibility ensures extremely fast wake-from-sleep times and better low-load efficiency for always-on workloads.

Replaces bulky standard ATX units

This unit upgrades from full-height power supplies that cannot fit in 1U enclosures or shallow cases. The jump is worth it when the build demands a thin profile and 80 PLUS Gold certified efficiency for lower power consumption, less noise, and cooler temperatures. Resonant LLC topology with DC-to-DC conversion provides clean, consistent power while enabling more energy-efficient sleep states.

Sustained load behaviour

At low and medium loads the cooling fan switches off entirely via Zero RPM Fan Mode for near-silent operation during extended idle or light-work periods. Under continuous demand the resonant LLC topology with DC-to-DC conversion maintains stable output and reduces coil whine for quieter operation. The Gold-rated efficiency keeps temperatures in check throughout prolonged sessions.

Highlights

  • Modern Standby compatible for fast wake-from-sleep
  • 80 PLUS Gold certified for lower power consumption and heat
  • Zero RPM fan mode stops the fan at low loads
  • Resonant LLC with DC-to-DC topology delivers clean, consistent power
  • 250 W ATX power supply in a 1U form factor

Specifications

TypeATX

Questions about this item

Will this 1U 250W ATX unit fit my slimline server chassis?

The HK353-11UEP is a 1U form-factor ATX supply, so it fits any chassis designed for 1U redundant or single power modules.

Which cables must I connect during installation, and which step is often missed?

Plug the 24-pin ATX, 4+4-pin CPU and required peripheral leads; the step most installers forget is seating the 4+4-pin CPU connector fully so the latch clicks.

What part will need attention after several years of continuous use?

The internal cooling fan is the only moving component; if bearing noise appears, replace the fan assembly to restore Zero RPM and 80 PLUS Gold performance.

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