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Rectangular ATX power supply unit with matte black finish and cooling fan grille

KHACHIMO

KHACHIMO 550W ATX Power Supply Gold Zero RPM LLC DC-DC

SKU CH-BGHV-1VK0D

ATX 550 W unit with 80 PLUS Gold efficiency, Zero RPM fan mode and LLC DC-DC topology for silent low-load operation

  • TypeATX
  • Faster wake-from-sleep with Modern Standby compatibility
  • 80 PLUS Gold efficiency cuts power use and heat
  • Zero RPM mode stops the fan at low loads
  • LLC resonant plus DC-DC topology delivers clean stable power
  • DC-DC conversion enables deeper energy-saving sleep states

550W ATX PSU for Modern Standby Systems

The KHACHIMO 550W ATX power supply targets builders and technicians who need a Gold-certified unit with Modern Standby support for fast wake-from-sleep. Its resonant LLC topology with DC-to-DC conversion delivers clean power and reduced coil whine. Zero RPM fan mode keeps the system near-silent at low and medium loads.

Replaces Lenovo X3550 X3650 M4 Units

This unit matches part numbers 7001676-J000, 7001676-J002, 94Y8065, 94Y8064, 94Y8112 and 94Y8111 for direct replacement in compatible Lenovo servers. The jump is worth it when the original supply fails or when 80 PLUS Gold efficiency is required for lower consumption. It is not for builds needing higher wattage or non-ATX form factors.

Standard ATX Installation

Installation follows normal ATX mounting and cabling procedures for compatible chassis. The LLC DC-DC design helps avoid coil whine issues common in lesser topologies. Zero RPM mode engages automatically, so no software setup is needed. Not for cases requiring proprietary power connectors or non-standard pinouts.

Points forts

  • Faster wake-from-sleep with Modern Standby compatibility
  • 80 PLUS Gold efficiency cuts power use and heat
  • Zero RPM mode stops the fan at low loads
  • LLC resonant plus DC-DC topology delivers clean stable power
  • DC-DC conversion enables deeper energy-saving sleep states

Caractéristiques

TypeATX

Questions sur cet article

Will this 550W ATX unit fit my standard ATX case?

Yes, the power supply follows the standard ATX form factor, so it mounts in any case designed for ATX power supplies using the four rear mounting screws.

What is the one installation step people forget with the Zero RPM fan mode?

Connect the motherboard fan-header cable supplied with the unit; without it the controller cannot monitor temperature and the fan will never spin up under load.

Which component typically needs attention first on a Gold-efficiency LLC DC-DC design like this?

The main electrolytic capacitors on the primary side are the longest-life items, but the fan bearing is the only moving part and will eventually require replacement after years of continuous use.

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