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Teardown of new iMacs reveals secondary PCIe slots for expansion

updated 09:52 am EDT, Wed September 25, 2013

CPU on 21.5-inch model no longer replaceable

Both the 21.5- and 27-inch models of the new iMac have undocumented secondary PCIe slots, suitable for an SSD or a Fusion Drive, according to an iFixit teardown. The extra slots appear regardless of whether or not the Mac was ordered with an SSD or a Fusion Drive in the first place. That stands in contrast with last year's iMac configurations.

The teardown also shows a union of SATA power/data hard drive cables, and a slimmer CPU heat sink. That CPU, however, is now soldered to the logic board on the 21.5-inch system. This prevents owners from upgrading or replacing the processor on their own, although the iMac was already a difficult computer to upgrade. iFixit does note that the CPU can still be replaced on the 27-inch model.

by MacNN Staff



  1. kerryb

    Fresh-Faced Recruit

    Joined: 08-05-01

    I bought the last "thin iMac" model with the Fusion drive option and I have never had a Mac of any size or model that is as responsive as the late 2012 iMac. I would encourage anyone that consider the 2013 mode to go for the Fusion drive you will be glad you did.

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