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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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Upgrade SSD from fusion drive

Hi

I want to upgrade SSD 4TB from my iMac fusion drive (1TB HDD and 128gb SSD).

Will this be ok?

My iMac is 27”, late 2014, 3.5ghz and 32gb memory.

Any suggest should I aware such as fan control will impact if I use this large of SSD?

Thanks

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A Fusion Drive is two physical drives a SATA drive iMac 因特尔 27" Retina 5K 显示屏 硬盘更换 as well as a Blade SSD 27英寸 5K Retina 显示屏 iMac 固态硬盘SSD 更换.

So the first thing you’ll need to think about is which one are you replacing. While more work, the Blade SSD is by far the best swap out for performance!

OWC offers a Aura Pro X2 2.0TB NVMe SSD. If you are into video this is by far the best solution, making it your boot drive holding your apps and your active work.

Then upgrade your much slower SATA drive with a bigger HDD or SSD if you need deeper storage to hold your finished work.

iMac Intel 27" Retina 5K Display 硬盘图片

指南

iMac 因特尔 27" Retina 5K 显示屏 硬盘更换

难度：

中等

—

1 - 2 hours
iMac Intel 27" Retina 5K Display Blade SSD（固态硬盘）更换图片

指南

27英寸 5K Retina 显示屏 iMac 固态硬盘SSD 更换

难度：

困难

—

2 hours

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Thank you for let me know.

To be clear of your suggest - I want to replace HDD to SDD which is no issue, but replace blade SSD is critical for the performance? if so, it is new to me as I thought just replace HDD to SDD…..

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Also would this not affect the fan sound or heat control?

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To get a better idea on the huge speed difference between the ports, give this a read! The Ultimate Guide to Apple’s Proprietary SSDs

A blade SSD won't alter your thermals negatively.

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Hi I have upgraded SSD (first to cloned from HDD to SSD) and then it appear not working as block sign appear and I able to access disk utility but I don’t understand and don’t sure what happen. Can you help me please?

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@razamac - You can't use cloning software any more! APFS volumes are very different from the older HFS+ volumes.

With the new drive mounted inside restart your system and press the Command (⌘)-R to enter into macOS Recovery: About macOS Recovery

Here's a bit more on the other startup keys: Mac startup key combinations

Then you'll need to connect your old drive to your system and use Migration Assistant to move your stuff over.

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