iMac 5k 2014 maximum speed SSD
What maximum speeds can be achieved by changing the SSD to for example, Samsung 970 EVO 500 Gb to M.2 in iMac 5k 2014 using adapter e.g. Sintech NGFF M.2 PCIe SSD. Thank you
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The fastest SSD you can use on your Mac is an external unit! via Thunderbolt2. OWC ThunderBay 4 RAID Loaded with Samsung SSD’s! I get 1 TB of throughput!
If you want something internally, then the fastest drive is Apple custom Samsung SSPOLARIS PCIe 3.0 x4 interface SSD It uses the same flash chips and controller the 970 EVO uses!
I really don’t recommend using M.2 SSD’s and these adapters. I’ve got a drawer full of dead ones I’ve pulled out of systems. Given the amount of work to open an iMac I really recommend sticking with a real Apple unit or go with either OWC or Transcend SSD’s which are designed to work in your Mac. In a MacBook Pro that at least is an easy replacement.
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Only the case itself costs much more than the disk that I want to replace. I will order a disk replacement at an authorized service center so I won't worry about opening it. Unfortunately, your answer is not a solution to my question.
@marcinek - OK you want the numbers, Here they are!
The internal Apple SSD (SSPOLARIS series) gets 3,200MB/s read and 1,900MB/s write for the 1 TB SSD:
Samsung 960 EVO M.2 SSD its the same drive! Just the custom version of it Apples was built first and then Samsung offered a M.2 version of it.
Now compare it to Samsung 970 EVO M.2 SSD which gets 3,400MB/s read and 2,300MB/s write for the 1 TB SSD:
Thanks Dan.
I understand that I will not get such speeds on this iMac model? If I checked well in this model the iMac is PCIe 2.0 x2 and it probably has a limit of 1.0GBps or I checked something wrong.
Review this The Ultimate Guide to Apple’s Proprietary SSDs
Thanks, Is it better to insert a JetDrive 850 in this iMac?
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Thanks for the details. But simple question is, I need max SSD speed from a late 2014 iMac. What is the fastest solution? The Apple drive seems not support or more likely will run at 1/2 speed since there are 2 lanes. Not sure how TB2 (even raid) could reach those speeds. Please clarify.
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True, you are limited to what your given system offers for I/O either internally or externally.
Here's the throughput of your systems internal PCIe connection: NVMe/PCIe 2.0 x2 (two lanes) offering an effective data rate of 4.0 Gb/s (1.0 GB/s). And your external Thunderbolt2 connection offers an effective data rate of 20 Gb/s (4.5 GB/s).
Just because the highway can support the throughput the given car (drive) can't necessarily achieve this either because of limitations of the drives technology or the systems ability to process the data (in or out)
A RAID'ed drive allows more throughput from the drive side.
