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Thin black four-wire cable with small rectangular connector

Ruth's sister

Ruth's sister J50GH 12V .75 4Wire internal power cable

SKU CH-P1S7-FF8E4

Four-wire 12 V 0.75 A cable powers the CPU cooling fan in Dell OptiPlex 790, 390 and 990 small-form-factor desktops

  • Delivers stable 12 V power to the CPU fan
  • Four-wire design enables precise PWM speed control
  • 75 A rating matches original Dell specifications
  • Direct fit for OptiPlex 790, 390 and 990 SFF systems

Dell OptiPlex SFF CPU fan power cable

This internal power cable connects a 12 V, 0.75 A CPU cooling fan in Dell OptiPlex 790, 390 and 990 small form factor systems. The four-wire connector matches the J50GH pinout used on the original PVB120G12H-P01 assembly. It is intended for technicians replacing a worn or damaged fan lead during a repair.

Capacity limited to a single 12 V fan

The cable carries only the current needed for one low-power CPU cooler, so it cannot support additional case fans, pump headers or higher-wattage cooling devices. Builders needing multiple fan connections or PWM control for several devices must use a separate fan hub or motherboard headers instead.

Highlights

  • Delivers stable 12 V power to the CPU fan
  • Four-wire design enables precise PWM speed control
  • 75 A rating matches original Dell specifications
  • Direct fit for OptiPlex 790, 390 and 990 SFF systems

Specifications

No published specifications for this item yet.

Questions about this item

Will the 4Wire connector on this cable fit the CPU fan header on my OptiPlex 790 SFF motherboard?

Yes, the 4Wire connector matches the PWM fan header used on the OptiPlex 790 390 and 990 SFF boards for CPU cooling.

How can I confirm the cable is delivering 12V 0.75 A to the fan after installation?

Enter the BIOS hardware monitor; the CPU fan RPM should read a steady value above 0 and the reported voltage should sit at 12 V.

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