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Silver rectangular 2U ATX power supply with fan grille

KHACHIMO

KHACHIMO EP2A5551A 550W ATX power supply

SKU CH-N23J-GDEH2

A 550W ATX power supply with 80 PLUS Gold efficiency, Modern Standby support, zero-RPM fan mode and resonant LLC topology with DC-to-DC conversion for clean, quiet power delivery

  • TypeATX
  • Modern Standby support for near-instant wake from sleep
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode keeps system silent at low loads
  • Resonant LLC with DC-to-DC delivers clean, stable power
  • 550 W ATX capacity fits standard desktop builds

550W ATX Power Supply

The KHACHIMO EP2A5551A is a 550W ATX power supply designed for systems that require efficient, low-noise power delivery. It suits builders who value quiet operation and modern sleep-state support in a standard form factor.

2U Form Factor with Silent Cooling

The 2U chassis fits rack or slim-tower enclosures where vertical space is limited. A Zero RPM fan mode stops the fan completely at low and medium loads, while resonant LLC topology with DC-to-DC conversion reduces coil whine and supplies clean power for stable daily use.

80 PLUS Gold Efficiency

Certified 80 PLUS Gold, the unit delivers high efficiency across typical loads, lowering electricity draw and heat output. Modern Standby compatibility enables extremely fast wake-from-sleep times and improved low-load efficiency for compatible platforms. Buyers needing more than 550W of continuous power should consider higher-capacity units.

Points forts

  • Modern Standby support for near-instant wake from sleep
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode keeps system silent at low loads
  • Resonant LLC with DC-to-DC delivers clean, stable power
  • 550 W ATX capacity fits standard desktop builds

Caractéristiques

TypeATX

Questions sur cet article

What ATX standard does the EP2A5551A meet, and what efficiency does it guarantee?

The unit is an ATX power supply with 80 PLUS Gold certification, ensuring high efficiency at typical loads for lower power draw and less heat.

What chassis space does the 550W KHACHIMO supply require?

It is a 2U form-factor unit, so it fits server or workstation cases that accept a 2U high power supply.

How is Modern Standby enabled on this PSU, and what setting is often missed?

Connect the motherboard's 24-pin and CPU power cables, then enable Modern Standby in the BIOS; the PSU's LLC resonant topology and DC-to-DC conversion handle the low-power states automatically.

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