Upgrading iMac Memory: 4x8 or 2x16

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Level 1

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Hello everyone!

I have a user with an iMac (27" Late 2015 version), who currently has 8GB or RAM.

I am planning to upgrade it to 32GB. Is there any differences between using a four of 8GB or two of 16GB

Posted on Aug 4, 2019 7:56 AM

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Answer 1

Level 10

148,488 points

No, as long as you install in matched pairs you should be fine.

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Answer 2

Level 10

91,036 points

If you add 2x8GB modules to the current 2x4GB modules, it will give you a total of 24GB

If you add 2x16GB modules to the current 2x4GB modules, it will give you a total of 40GB.

Then if later, you decide that you need more than 24GB or 40GB, then you can always replace the original 2x4GB modules.

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