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8GB DDR4-2400MHz PC4-19200 SO-DIMM Memory for Apple 21.5" iMac with Retina 4K Display Mid 2020 by NEMIX RAM System Specific Memory - Newegg.com
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Timetec 32GB KIT(2x16GB) Compatible for Apple 2017 iMac (27-inch w/Retina 5K, 21.5-inch
iMac 2017 RAM update, running smoothly on 3200MHz DDR4, higher than 2400MHz Recommendation : r/mac
2019 iMac and DDR4 2400 memory | MacRumors Forums
Crucial 8GB DDR4-2400 SODIMM Memory for Mac | CT8G4S24AM | Crucial.com
8GB iMac Memory for 27-inch Retina - 2019 to Current - Models 19.1 20.1 20.2 | Ramjet.com
