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Green Dell Latitude 3390 2-in-1 motherboard with i3-7020U 2.3GHz CPU

DELL

DELL Latitude 3390 2-in-1 Motherboard i3-7020U 2.3GHz J8NR3

SKU CH-4DEF-02TKV

Replacement system board for the Latitude 3390 2-in-1 with an on-board Intel Core i3-7020U dual-core processor at 2.3 GHz

  • Genuine Dell OEM part ensures exact fit for Latitude 3390 2-in-1
  • On-board Intel Core i3-7020U at 2.3 GHz delivers dual-core performance
  • Direct replacement motherboard restores full system function
  • Dell part number J8NR3 confirms correct component match
  • Includes factory-installed processor eliminates separate CPU installation

Genuine Dell Latitude 3390 2-in-1 System Board

This genuine Dell OEM motherboard serves as a direct replacement for the Latitude 3390 2-in-1 laptop. It arrives with the Intel Core i3-7020U dual-core processor permanently soldered at 2.3GHz. The board carries Dell part number J8NR3 and matches the original factory specification.

Fits Latitude 3390 2-in-1 Chassis Precisely

The system board is engineered to the exact mechanical and electrical layout of the Latitude 3390 2-in-1, so existing mounting points, connector positions and cooling interfaces align without modification. Reusing the original heatsink, display cable and daughter-board connections frees the builder from sourcing model-specific ancillaries.

Sustained Load Behaviour With Soldered i3-7020U

Because the CPU is soldered directly to the board, thermal transfer relies entirely on the laptop’s factory cooling solution rather than a socketed upgrade path. Under prolonged workloads the dual-core 2.3GHz processor will throttle according to the chassis thermal limits, delivering consistent baseline throughput instead of short burst peaks.

How it compares

Measured against everything we stock in Motherboards for Intel CPUs, at today’s prices. Recalculated every night.

Price $30.99
Cheaper than about 93% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameDELL

Questions about this item

What thermal limit does the on-board i3-7020U hit first under sustained load?

The dual-core i3-7020U at 2.3 GHz will reach its TDP ceiling before the board VRM or memory limits become the bottleneck.

How loud and hot does the Latitude 3390 2-in-1 run with this board during all-day use?

The thin 2-in-1 chassis relies on a single small fan; expect audible spin-up and surface warmth near the hinge within an hour of continuous CPU load.

Which existing Latitude 3390 2-in-1 parts must I reuse for this J8NR3 motherboard to work?

You must reuse the original display assembly, keyboard, battery, SSD, Wi-Fi card and bottom cover — the board only supplies the CPU and chipset.

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