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Crucial 4GB Single DDR3-1600 (PC3-12800) SODIMM 204-Pin High Density Memory CT51264BF160BJ at Amazon.com
OWC 8GB PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Module Upgrade Compatible with iMac, Mac Mini, and MacBook Pro (OWC1600DDR3S8GB) at Amazon.com
Supermicro 8GB DDR3 MEM-DR380L-HL02-ES16 Server Memory
8GB DDR3L RAM 1600/1333/1866 MHZ 204PIN 1.35V 2R*8 Double model SODIMM memory for laptop|RAMs| - AliExpress