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Your iMac comes with at least 4 gigabytes (GB) of Double Data Rate 3 (DDR3) Dynamic Random Access memory (DRAM) installed as two 2 GB memory modules. You can replace or install additional 2 GB or 4 GB memory modules for up to a maximum of
16 GB. Memory modules must meet the following specifications:
ÂSmall Outline Dual Inline Memory Module
Â1066 MHz,
ÂUnbuffered and unregistered
WARNING: Apple recommends that you have an