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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
Crucial 16GB 2 x 8 GB DDR3 SDRAM Memory Kit 16 GB 2 x 8GB DDR3 1600PC3 12800 DDR3 SDRAM 1600 MHz CL11 1.35 V Non ECC Unbuffered 204 pin SoDIMM Lifetime Warranty - Office Depot