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Timetec 8GB DDR4 2400MHz (DDR4-2400) PC4-19200 (PC4-2400T) Non-ECC Unbuffered 1.2V CL17 1Rx8 Single Rank 260 Pin SODIMM Laptop Notebook PC Computer Memory RAM Module Upgrade (8GB) at Amazon.com
Amazon.com: Crucial RAM 8GB DDR4 2400 MHz CL17 Memory for Mac CT8G4S24AM : Everything Else