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Compact 550W Flex ATX power supply, matte black metal casing, single cooling fan visible

KHACHIMO

KHACHIMO LL1U550F/Flex 550W power supply

SKU CH-4TG1-813WV

New 550 W ATX power supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for silent, efficient operation

  • TypeATX
  • Modern Standby compatible for extremely fast wake-from-sleep
  • 80 PLUS Gold certified for lower consumption and cooler running
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and reduces coil whine
  • 550 W output in a compact 1U Flex form factor

Compact ATX supply for ITX and 1U builds

The KHACHIMO LL1U550F/Flex is a 550 W ATX power supply designed for small-form-factor systems such as Mini-ITX PCs, 1U rack units and NAS enclosures. Its 80 PLUS Gold certification ensures high efficiency, reducing heat and electricity use. A Zero RPM fan mode stops the fan completely at low and medium loads for near-silent operation.

Suited for space-constrained modern-standby systems

Builders assembling compact workstations or home servers that rely on Modern Standby will benefit from the fast wake times and the resonant LLC topology with DC-to-DC conversion that supports low-power sleep states. It is not for users who need higher wattage for multi-GPU configurations or full-size ATX cases with greater clearance requirements.

550 W continuous output decides fit

The single figure that determines compatibility is the 550 W rating; the unit must cover the total peak draw of every component in the build. If the planned hardware exceeds this limit, a higher-capacity supply is required.

Points forts

  • Modern Standby compatible for extremely fast wake-from-sleep
  • 80 PLUS Gold certified for lower consumption and cooler running
  • Zero RPM fan mode stops the fan at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and reduces coil whine
  • 550 W output in a compact 1U Flex form factor

Caractéristiques

TypeATX

Questions sur cet article

What is the 550 W limit under sustained load?

The unit is rated for 550 W continuous output and holds 80 PLUS Gold efficiency at typical loads, so the first sustained ceiling is the 550 W label itself.

How does the 39 mm fan behave once the supply runs all day?

A Zero RPM mode keeps the 39 mm fan stopped at low and medium loads, and the resonant LLC plus DC-to-DC design cuts coil whine for quieter long-term operation.

Which connectors must the build already provide for this Flex ATX unit to work?

The PSU uses a standard 24-pin ATX motherboard connector plus an 8-pin EPS CPU plug and two 8-pin PCIe leads, so the motherboard and graphics card must supply those sockets.

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