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Rectangular metal power supply unit with fan grille and cable bundle

Ruth's sister

Ruth's sister K350R 180W internal power cable

SKU CH-W9NC-YX6Q9

180 W desktop and server PSU with passive PFC, 8-pin graphics and 4-pin CPU connectors, 100–264 V input

  • 180 W output powers demanding desktop and server builds
  • 100–264 V input works worldwide without a voltage switch
  • 8-pin PCIe connector feeds modern graphics cards
  • 4-pin CPU connector supplies processor power directly
  • Passive PFC keeps the design simple and reliable

180W K350R power supply for OptiPlex 780 USFF

This 180 watt internal power supply is built for the Dell OptiPlex 780 ultra-small-form-factor chassis. It delivers up to 180 watts from a 100 to 264 volt input and carries passive power-factor correction. The unit is non-modular and includes an eight-pin graphics connector and a four-pin CPU connector.

Sustained load behaviour with passive PFC

Passive power-factor correction means the supply draws current in a less sinusoidal way than active-PFC units, so sustained loads near 180 watts can increase harmonic distortion on the mains. The supply has no 80 PLUS efficiency rating, so waste heat rises steadily under continuous load; ensure the chassis airflow can handle the thermal output.

Compatibility checks before ordering

Verify that your OptiPlex 780 USFF uses the K350R or L180EU-00 part number, as other USFF models use different pin-outs. Confirm the motherboard requires only an eight-pin GPU power lead and a four-pin CPU lead; systems needing a 24-pin ATX or additional six-pin connectors will not work. The unit is sold as used but tested, so inspect the capacitor condition on arrival.

Highlights

  • 180 W output powers demanding desktop and server builds
  • 100–264 V input works worldwide without a voltage switch
  • 8-pin PCIe connector feeds modern graphics cards
  • 4-pin CPU connector supplies processor power directly
  • Passive PFC keeps the design simple and reliable

Specifications

No published specifications for this item yet.

Questions about this item

How loud or hot does the 180W K350R supply run during all-day operation?

The unit is a used 180W server supply pulled from an Optiplex 780 USFF; it uses passive PFC and a non-modular design, so expect typical small-form-factor fan noise and heat under continuous load.

What connectors must my motherboard and graphics card already have for this supply to work?

It provides a 4-pin CPU power connector and an 8-pin 12V graphics connector; your board needs matching 4-pin EPS and the GPU needs an 8-pin PEG socket.

Will the K350R fit and power an older Optiplex 780 USFF chassis I still use?

Yes — this supply came from that exact model, delivers 180W max across 100-264V input, and includes the proprietary pinout required by the 780 USFF.

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