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How to replace the Fusion Drive in a 27-inch iMac 5K

Replacing the Fusion Drive with both a SSD and an harddisk

July 30, 2020 -

This month I did an attempt to upgrade my 27-inch iMac 5K. I wanted to replace the fusion drive with a SSD and a large hardisk. In addition I decided this was a good time to upgrade the RAM memory as well, maxing it out at 64GB. I was on a mission to create the ultimate iMac, but things didn't go to plan!

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YES, it works! The new logic board accepted keyboard input and allowed me to proceed with macOS installation
YES, it works! The new logic board accepted keyboard input and allowed me to proceed with macOS installation
Migrating the RAM modules to the new logic board
Migrating the RAM modules to the new logic board
Removing the power supply board
Removing the power supply board
Disconnecting the iSight's (Applespeak for webcam) USB cable
Disconnecting the iSight's (Applespeak for webcam) USB cable
The new drive is ready to be installed - what could possibly go wrong?
The new drive is ready to be installed - what could possibly go wrong?
Disconnecting the microphone cable - right under my thumb - it's very tiny!
Disconnecting the microphone cable - right under my thumb - it's very tiny!

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