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A-Tech 16GB (2x8GB) RAM for Apple iMac 2017 (27 inch Retina 5K & 21.5 inch Retina 4K) | DDR4 2400MHz SODIMM PC4-19200 1.2V 260-Pin SO-DIMM Memory Upgrade Kit at Amazon.com
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iMac "Core i5" 3.4 27" (5K, Mid-2017) Specs (Retina 5K, Mid-2017, MNE92LL/A, iMac18,3, A1419, 3070): EveryMac.com
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