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Timetec 32GB KIT(2x16GB) Compatible for Apple 2017 iMac (27-inch w/Retina 5K, 21.5-inch w/Retina 4K / Non-Retina 4K) DDR4 2400MHz PC4-19200 SODIMM MAC RAM Upgrade for iMac 18,1 / iMac 18,2 / iMac 18,3
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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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Computers & Electronics :: iMac :: Apple iMac 27-Inch 5K 3.4GHz Core i5 1TB Fusion 16GB - 32GB 2400MHz RAM 4GB GPU 2017
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Review: Apple's 2017 27" 5K iMac impresses with truly powerful desktop-class graphics | AppleInsider
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