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Compact black rectangular 650W Flex ATX power supply with modular connectors and cooling fan

KHACHIMO

KHACHIMO FLEX-650 650W power supply

SKU CH-MV68-WASHS

A 650W fully modular 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

  • TypeATX
  • Modern Standby support for extremely fast wake-from-sleep
  • 80 PLUS Gold certified for lower power consumption and cooler temps
  • 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
  • 650 W ATX output in a compact Flex form factor

Compact 650 W Flex ATX supply

The KHACHIMO FLEX-650 is a 650 W Flex ATX power supply built for small-form-factor systems such as ITX cases, NAS enclosures and 1 U server chassis. Its fully modular cabling keeps the interior tidy and airflow unobstructed in tight spaces. The unit is new and carries 80 PLUS Gold certification for efficient operation. Builders who need a compact, high-efficiency unit for a low-profile build will find it a direct fit.

Gold efficiency with semi-passive cooling

An 80 PLUS Gold rating means lower waste heat and quieter running across typical loads. A Zero RPM fan mode stops the fan completely at low and medium loads, delivering near-silent operation during idle or light work. Resonant LLC topology with DC-to-DC conversion supplies clean, stable power and helps suppress coil whine. Modern Standby compatibility enables extremely fast wake-from-sleep transitions and improved low-load efficiency.

Verify Flex ATX clearance and cable reach

Confirm your chassis accepts a Flex ATX form-factor unit and that the mounting holes align with the 1 U profile. Check that the supplied modular cables are long enough for your component layout in a compact case. Ensure the 650 W capacity matches the peak draw of your CPU, GPU and drives. Buyers whose cases require a standard ATX or SFX form factor cannot use this supply.

Highlights

  • Modern Standby support for extremely fast wake-from-sleep
  • 80 PLUS Gold certified for lower power consumption and cooler temps
  • 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
  • 650 W ATX output in a compact Flex form factor

Specifications

TypeATX

Questions about this item

What does the 80 PLUS Gold rating mean for real-world efficiency on the FLEX-650?

The 80 PLUS Gold certification confirms high-efficiency operation, lowering power draw, reducing heat output and keeping fan noise lower across typical loads.

What physical space and mounting points does the FLEX-650 need in a chassis?

It uses the compact 1U Flex ATX form factor designed for small ITX, NAS or server cases with matching Flex mounting holes and clearance.

How do I install the fully modular cables correctly on this unit?

Connect only the cables your build requires to the labelled ports on the PSU; the common mistake is forcing a PCIe plug into a CPU socket or leaving the 24-pin loosely seated.

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