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First. Thank you for your great Guides. With your help i have repaired my iPhone and change the HD from my iMac. Now i have one more question. How much Ram can i put in my iMac EMC 2544? 2x 8 GB or 2x 16GB? Thank you for your answer. Update One more Question. I think it should be possible to put the 2x 4GB Ram, which are actually in my iMac, in my MacBook 2009 Late. In my MacBook are 2x 2GB in . Is it possible or not? Thank you for your answer.
Late 2012 21.5" iMac/i5/2.7GHz and 2.9GHz have 2 slots that accept 2DDR3 laptop RAM, so you can fit up to 28GB. I don’t know about any single 16GB RAM in one module that would fit on this model yet. There is talk (that’s one article) about upcoming single 16GB RAM DDR3 modules but I don’t believe any is available yet. You can verify your configuration and the amounts of available slots here to see how different models compare, and you can notice that the 27" models from the same 2012 line-up have 4 easily accessible RAM slots that accept up to 4*8GB RAM. So if you require 32GB RAM at all cost, you may consider moving to a 27" model. I did make the comparison, but cannot seem to save it in a link. Please note the following:
- This series of iMacs requires a specific kind of RAM modules marked as 1.35V. The 2*8GB Corsaire RAM modules you are buying are marked as 1.5V. It is not enough to have them “Apple Certified.” I am not knowledgeable enough to recommend the exact needed type of RAM and instead advise you to check other questions and answers about them first and determine what is needed.
- To access the RAM slots on this 21.5" iMac, you will have to remove the front panel, which is not as straightforward as replacing them on a regular laptop. See this guide to determine if you are up to it and/or have the needed tools.
