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Corsair Apple Certified 16 GB (2x8 GB) DDR3 1600MHz (PC3 12800) Laptop Memory 1.35V at Amazon.com
CORSAIR Vengeance 16GB (2 x 8GB) 240-Pin PC RAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ16GX3M2A1600C9 Desktop Memory - Newegg.com