“Will this work in my 21.5 in. Late 2009 IMac? It has two 2 GB DDR3 Sdram in it right now with 2 open slots.”

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• Yes it will. However because you're already upgrading, I would recommend removing the two 2GB sticks and maxing out all four slots by picking up two of these 8GB Corsair RAM kits. The idea is that all your memory runs at the same speed and latency timings for maximum efficiency.

  Answered by LeeroyJenkins 5 years ago

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• Hi, Seems like it would but you may have to remove the other kit that's inside it to prevent compatibility issues: https://support.apple.com/en-us/HT201191#2 If you have any other questions, please reach out: support.corsair.com

  Answered by Corsair 5 years ago

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