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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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Removing the heatsink from the logic board
Removing the heatsink from the logic board
Creating a USB recovery drive using another MacBook
Creating a USB recovery drive using another MacBook
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
After installing the new RAM, I powered on my iMac to see if the new modules worked - they did!
After installing the new RAM, I powered on my iMac to see if the new modules worked - they did!
The Power Supply should be handled with extra care, don't touch any solder joint as the capacitors can retain some charge after disconnecting the power cable!
The Power Supply should be handled with extra care, don't touch any solder joint as the capacitors can retain some charge after disconnecting the power cable!
The factory installed 32GB SSD that we're going to replace
The factory installed 32GB SSD that we're going to replace

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