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Rectangular black ATX power supply unit with cooling fan grille

KHACHIMO

KHACHIMO 550W ATX Gold Power Supply L550E-S1

SKU CH-BGTC-DH5JZ

A 550W ATX power supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for fast wake times and quiet operation

  • TypeATX
  • Modern Standby support enables extremely fast wake-from-sleep
  • 80 PLUS Gold certification lowers power draw and reduces heat
  • Zero RPM fan mode stops the fan at low loads for silent running
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and cuts coil whine
  • 550 W ATX output powers compatible Dell R430, R330, R340, R440 and DS1500 systems

550W ATX Gold Power Supply

The KHACHIMO L550E-S1 is a 550W ATX power supply built for modern desktop systems that demand efficient and stable power delivery. It carries 80 PLUS Gold certification and supports Modern Standby for rapid wake-from-sleep performance.

Resonant LLC Topology with DC-to-DC Conversion

This topology provides clean, consistent power while reducing coil whine for quieter operation and enabling more energy-efficient sleep states. The Zero RPM fan mode stops the cooling fan entirely at low and medium loads for near-silent running.

Upgrade from lower-efficiency or noisy units

The jump is worth it when replacing a supply that lacks Gold-rated efficiency, Modern Standby support, or a semi-passive fan mode. It is not for builds requiring higher wattage than 550W or server-grade redundancy features.

Points forts

  • Modern Standby support enables extremely fast wake-from-sleep
  • 80 PLUS Gold certification lowers power draw and reduces heat
  • Zero RPM fan mode stops the fan at low loads for silent running
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and cuts coil whine
  • 550 W ATX output powers compatible Dell R430, R330, R340, R440 and DS1500 systems

Caractéristiques

TypeATX

Questions sur cet article

Does this 550W ATX power supply support Modern Standby for fast wake-from-sleep?

Yes, it is Modern Standby compatible, giving extremely fast wake-from-sleep times and better low-load efficiency.

Will this unit fit a standard ATX case and what mounting pattern does it use?

It follows the ATX form factor, so it mounts in any standard ATX chassis using the usual four-screw pattern on the rear panel.

How do I enable the Zero RPM fan mode and what load range keeps the fan off?

The fan stops automatically at low and medium loads; no software or BIOS setting is needed — just ensure the PSU fan can draw cool air.

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