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Blue Dell laptop motherboard with integrated Pentium Gold 5405U processor

DELL

DELL Inspiron 3580 3780 Motherboard C75M5 Pentium Gold 5405U 2.3GHz laptop replacement part

SKU CH-QHX3-JYR27

Genuine Dell motherboard with integrated Intel Pentium Gold 5405U dual-core 2.3 GHz processor restores Inspiron 15 3580 and Inspiron 17 3780 laptops

  • Compatible ManufacturerFor Dell
  • Compatible ModelsFor Dell Inspiron 3580, Dell Inspiron 3780
  • ColorBlue
  • Genuine Dell C75M5 motherboard restores Inspiron 3580 or 3780 laptops
  • Integrated Pentium Gold 5405U dual-core CPU at 2.3 GHz handles daily tasks
  • Two DDR4 SODIMM slots enable memory upgrades for better responsiveness
  • Full SATA and I/O connector set matches original board layout
  • Direct form-fit replacement eliminates guesswork during repair

Genuine Dell Inspiron 3580 & 3780 Motherboard

This genuine Dell replacement motherboard (Part # C75M5) fits Inspiron 15 3580 and Inspiron 17 3780 laptops. It arrives with the Intel Pentium Gold 5405U dual-core processor soldered in place at 2.3GHz. The board serves as a direct form-fit repair for motherboard failure or component damage. Buyers needing a different processor or a board for another model cannot use this part.

Thermals Noise Power

The integrated Pentium Gold 5405U is an energy-efficient dual-core CPU designed for everyday computing tasks. Its low power profile works with the original laptop cooling assembly to maintain stable temperatures during normal use. Fan behaviour and acoustic levels match the factory design for the 3580 and 3780 chassis. No separate power adapter or voltage specification is provided.

Connectors Mounting Upgradability

The board includes all necessary connectors for SATA storage, keyboard, touchpad, display, audio, fans and original ports. Two accessible SODIMM slots support dual-channel DDR4 memory upgrades for improved responsiveness. Mounting points align precisely with the Inspiron 3580 and 3780 chassis for a perfect fit. Verify your exact model number and service tag before installation.

Highlights

  • Genuine Dell C75M5 motherboard restores Inspiron 3580 or 3780 laptops
  • Integrated Pentium Gold 5405U dual-core CPU at 2.3 GHz handles daily tasks
  • Two DDR4 SODIMM slots enable memory upgrades for better responsiveness
  • Full SATA and I/O connector set matches original board layout
  • Direct form-fit replacement eliminates guesswork during repair

Specifications

BrandDell
ModelInspiron 3580 & 3780
Part NumberC75M5
Compatible ManufacturerFor Dell
Compatible ModelsFor Dell Inspiron 3580, Dell Inspiron 3780
ColorBlue

Questions about this item

How do I install the C75M5 motherboard in my Inspiron 3580, and which step do people get wrong?

Remove the battery first, then disconnect the display, keyboard, touchpad, SATA drive and fan cables before unscrewing the board. The step most often missed is reconnecting the display cable securely under the hinge bracket.

What maintenance or replacement will the C75M5 motherboard need later?

The integrated Pentium Gold 5405U cannot be upgraded. Plan to replace the CMOS battery every few years and clean the fan heatsink annually; the two DDR4 SODIMM slots remain accessible for future memory changes.

What limit appears first on the C75M5 under sustained load?

The 2.3 GHz dual-core processor hits its thermal ceiling quickly during long renders or compiles, causing the fan to spin at maximum speed and the firmware to throttle clocks to protect the soldered CPU.

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