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Model A1419 / EMC 2806 / Late 2014 or Mid 2015. 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (ID iMac15,1); EMC 2834 late 2015 / 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (iMac17,1) All with Retina 5K displays

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Is it possible to have NVMe only on iMac 27" late 2014?

I have iMac 15.1. I have 512GB SSD installed on SATA bus.

No NVMExpress devices reported.

I plan to get 2TB NVMe SSD from OWC and remove SSD.

Is it possible to have only NVMe drive?

The drive appearance in the OS:

Block Image

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Let's gets some clarity on your current configuration. What is your current drive? Is it a SATA drive that replaced the original HDD? Or is it a PCIe/NVMe drive that Apple had installed from the factory.

Also what is the size of drive you are planing on putting in?


I have only regular 512GB SSD instead of HDD. It appears as APPLE SSD SM0512F under SATA. It was installed by Apple during initial buying.

I plan to install 2 TB NVMe.

No NVMExpress devices reported.


The model seems to have been listed as compatible on OWC website


I'm a bit confused! A SATA listing tells me you have a SATA HDD (unless you switched it out) The Apple SM0512 listing it telling me you have a blade SSD NVMe/PCIe 3.0 x4

So it sounds you may have two drives in your system. Did you buy your system used?


@Dan, I added screenshot:

NVMExpress tab says: This computer doesn’t contain any NVMExpress devices. If you installed NVMExpress devices, make sure they are connected properly and powered on.

When I bought iMac I ordered custom configuration with SSD. I actually bought the device through Apple web store and picked up later.


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OK I see the confusion! The Apple SSD is a PCIe/AHCI drive not a PCIe/NVMe. Thats why it’s listed under the SATA section! Hopefully this helps explain things.

Block Image

So to clarify your current SSD is using the PCIe connection, so you would need to take it out to make room for the PCIe/NVMe drive.

So to answer your question: Yes, you can swap out the SSD and run your system with the OWC SSD.

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zoonman sera éternellement reconnaissant.
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