Better replacement drive on my iMac 27" Retina 2019? — NVMe SSD or 2.5" SATA III SSD?

I need a new internal drive for my iMac. The options are NVMe SSD and a 2.5" SSD, each 2 TB.


I use the iMac for CAD, Photoshop, and normal uses like Word and Excel.


What are the arguments either way?


Thanks in advance!

iMac 27″, macOS 13.2

Posted on Feb 22, 2023 3:10 PM

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4 replies

Feb 23, 2023 7:27 AM in response to Edward M. Baum

Simpler than entirely dismantling your iMac to get at that guess-work SSD slot, I recommend an appropriately sized external Crucial X8 USB 3.2 Gen 2 (10Mbps) drive rated at 1050 MB/s that you direct connect via USB-C to one of your available USB-C or Thunderbolt 3 ports.


All of my current external drives (e.g. Time Machine, Parallels 18 Pro guests) are on these Crucial drives and they are flawless.

Feb 23, 2023 7:13 PM in response to Edward M. Baum

I would do the easy first, then the difficult…


Memory, then hard drive, then blade drive…


OEM memory is listed as 8 gigabytes, with 128 possible, two slots open.

You can add two 16 or 32 gigabyte chips, giving you 40 or 72…

Look at Other World Computing for chips.


Second is internal hard drive. While this requires opening the iMac, the drive is pretty accessible…

The question is, SSD or platter?

A 4 terabyte Western Digital Black is about the same cost as a 1 terabyte Samsung 870 EVO.

Look on NewEgg for good prices.

Use the Newer 2.5 to 3.5 adapter from Other World with the SSD…


Last is a blade. Major disassembly…. Look on Other World for a blade. I would get a small one, then load my Operating System on it, and programs on the Internal hard drive…

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Better replacement drive on my iMac 27" Retina 2019? — NVMe SSD or 2.5" SATA III SSD?

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