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Current version by: Dan ,

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As far as I have read (could be wrong though) the PCIe slot is only present if the iMac was ordered with a Fusion Drive. Can anyone confirm this? It

It
is then easy to setup your own Fusion Drive combining any PCIe blade with a normal drive. You can not make a Fusion Drive from 2 SSDs though. No support for that. Also

Also
I am not sure if TRIM support is possible with 3rd party drives. If

If
the PCIe slot in the 2013 iMac is the same as for Late-2013 MacBook Pros then you can use any cheaper PCIe NVMe blade SSD. I got an adapter from Sintech ($9) so I can use any PCIe M-Slot blade SSD. The

The
NVMe support was introduced with OS XMacOS High Sierra. I am using a 1TB Samsung SM961 in a 2015 MacBook Pro 15" that achieves blazing speed 1400/1900 MB/s. And I got it on Ebay for $530. Has anyone tested this on the iMac?
As far as I have read (could be wrong though) the PCIe slot is only present if the iMac was ordered with a Fusion Drive. Can anyone confirm this? It

It
is then easy to setup your own Fusion Drive combining any PCIe blade with a normal drive. You can not make a Fusion Drive from 2 SSDs though. No support for that. Also

Also
I am not sure if TRIM support is possible with 3rd party drives. If

If
the PCIe slot in the 2013 iMac is the same as for Late-2013 MacBook Pros then you can use any cheaper PCIe NVMe blade SSD. I got an adapter from Sintech ($9) so I can use any PCIe M-Slot blade SSD. The

The
NVMe support was introduced with OS XMacOS High Sierra. I am using a 1TB Samsung SM961 in a 2015 MacBook Pro 15" that achieves blazing speed 1400/1900 MB/s. And I got it on Ebay for $530. Has anyone tested this on the iMac?

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Original post by: asle ,

Text:

As far as I have read (could be wrong though) the PCIe slot is only present if the iMac was ordered with a Fusion Drive. Can anyone confirm this? It is then easy to setup your own Fusion Drive combining any PCIe blade with a normal drive. You can not make a Fusion Drive from 2 SSDs though. No support for that. Also I am not sure if TRIM support is possible with 3rd party drives. If the PCIe slot in the 2013 iMac is the same as for Late-2013 MacBook Pros then you can use any cheaper PCIe NVMe  blade SSD. I got an adapter from Sintech ($9) so I can use any PCIe M-Slot blade SSD. The NVMe support was introduced with OS X High Sierra. I am using a 1TB Samsung SM961 in a 2015 MacBook Pro 15" that achieves blazing speed 1400/1900 MB/s. And I got it on Ebay for $530. Has anyone tested this on the iMac?

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