Logic Board (3.1GHz i5, 16GB, HDD Conn.)

Used Condition



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  • This logic board includes an Intel 3.1GHz i5 (i5-5675R) processor, 16GB onboard memory and heatsink attached.
  • Versions of this board exist with and without SSD connector, but this particular board does not include the PCIe SSD connector and cannot accommodate an Apple blade SSD.
  • The Late 2015 iMac 21.5" was available with standard and Retina 4K LCD displays, but this board is only compatible with the Retina 4K display option.

What's Included

  • 1 - Logic board
  • 1 - Heatsink

Identifying Numbers

  • APN : 661-03279

    Apple Part Numbers

    • Created for internal Apple use.
    • Never visible on the item.
  • PPN : 820-00431-02, 820-00431-A

    Printed Part Numbers

    • Created by manufacturers during production.
    • Always visible on the item.

Tech Specs

  • Onboard CPU: Intel 3.1GHz Core i5-5675R
  • Onboard GPU: Intel Iris Pro 6200
  • Onboard RAM: 16GB LPDDR3 (1867MHz)


Lifetime - We guarantee this product for as long as you have it.


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iMac 21.5" A1418
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  • iMac16,2 Retina 4K Late 2015: MK542LL/A (3.3 GHz Core i7)