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KHACHIMO 550W ATX power supply unit in black metal casing with cooling fan grille

KHACHIMO

KHACHIMO 550W ATX Power Supply 00FK930 00YJ981 00YJ971

SKU CH-HRMQ-6VY2Y

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

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • Lower power draw and cooler temps via 80 PLUS Gold
  • Near-silent operation thanks to Zero RPM fan mode
  • Clean, stable power from Resonant LLC with DC-to-DC
  • Compatible with X3650M5, X3550M5 and X3500M5 servers

Server-Grade ATX Replacement

This 550 watt ATX power supply is built as a direct replacement for Lenovo ThinkSystem X3650 M5, X3550 M5 and X3500 M5 servers. It fits the standard ATX form factor used in those chassis and delivers the rated output required by the original specifications.

Efficiency and Acoustic Benefits

The 80 PLUS Gold certification means the unit runs at high efficiency across typical loads, reducing waste heat and lowering operating costs. Zero RPM fan mode stops the fan completely at low and medium loads, while the resonant LLC topology with DC-to-DC conversion minimises coil whine and supports modern standby sleep states for faster wake times.

Hot-Swap Server Integration

Designed for hot-swap bays in rackmount servers, the unit plugs directly into the chassis backplane without extra cabling. The server-grade connectors and locking mechanism allow replacement under power, and the compact ATX dimensions match the original equipment envelope for tool-less installation.

Highlights

  • Fast wake-from-sleep with Modern Standby support
  • Lower power draw and cooler temps via 80 PLUS Gold
  • Near-silent operation thanks to Zero RPM fan mode
  • Clean, stable power from Resonant LLC with DC-to-DC
  • Compatible with X3650M5, X3550M5 and X3500M5 servers

Specifications

TypeATX

Questions about this item

How long will the internal fan last before it needs replacement?

The fan stops completely at low and medium loads via Zero RPM Fan Mode, so it only accumulates wear during sustained high-load operation.

What component or limit will throttle output first during continuous heavy use?

The 80 PLUS Gold efficiency rating keeps waste heat low, so thermal protection is the first limit reached under sustained 550 W delivery.

How much noise and heat should I expect when the unit runs all day at typical load?

At low and medium loads the fan remains off for near-silent operation; at higher loads the LLC resonant topology with DC-to-DC conversion minimises coil whine and keeps temperatures cooler.

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