iMac late-2014 SSD blade upgrade - link width hasn't increased
I just replaced the 128 GB Apple blade SSD in my late 2014 5k 27" iMac with a 500 GBg Apple blade SSD (SM0512L) breaking the original Fusion Drive set. I also replaced the 1TB HDD with a Crucial SSD.
The Crucial SSD via the HD SATA port is connected at full speed (6.0 Gb/s), very happy.
But the new Apple SSD shows a Link Width x2 (@5GTs). The SSD is a 2018 model and PCIe x4 - why am I only getting x2 (and hence lower speeds)?
Is it because my iMac doesn't support PCIe x4 ? The new SSD also now shows under NVMe. I've spent the past few days (and literally hours) reading through various forum postings, but can't find anything about my particular iMac model and the 'support' for Apple SSD's.
The speed for the new SSD is much better than the original - 730 for both read/write, compared to 290 write, 580 read on the older model, but I was expecting double those figures - probably stupidly.
Anybody know what the late 2014 27" iMac actually supports?
Questa è una buona domanda?
5 Commenti
Did you review this helpful listing: The Ultimate Guide to Apple’s Proprietary SSDs?
da Dan
Yes, its my bible :) It states that the late-2014 27 inch does support pcie 2.0 4 lanes... but I've seen people comment on other forums that it doesn't. And as I'm not seeing 4 lanes in the link width, something definitely isn't right. I'm wondering if I did something wrong in the install and the SSD connected at a lower link by default? I didn't install the OS to the new SSD 'externally', I did it via recovery once I'd fitted it.
da Nathan
The Ultimate Guide article has since been updated to correct that the late 2014 iMac uses 2 lanes.
da brianc
@brianc - If you have a way, I would clarify a 4x blade will work but won''t offer more than x2 lanes. Which is the real issue here.
da Dan
That iMac does not support 4 channel, I'm going to have the same problem.:-(
da D Umie