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Buy the RIPJAWS X 16gb (4 X 4GB) DDR3 2133MHz PC3-17000 DIMM Gaming RAM for PC F3-2133C9D-8GXL - Untested | GoodwillFinds
G.Skill Ripjaws X Series 16 GB (2 x 8 GB) 240-Pin SDRAM (PC3-12800) DDR3 1600 CL10-10-10-30 1.50V Dual Channel Desktop Memory Model F3-12800CL10D-16GBXL at Amazon.com
G.SKILL Ripjaws Series 8GB (2x4GB) 240-Pin DDR3 RAM - Pangoly
G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin PC RAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-1600C9D-16GXM - Newegg.com
G.SKILL Ripjaws Series 16GB (2 X 8GB) 204-Pin DDR3 SO-DIMM DDR3L 1600 (PC3L 12800) Laptop Memory Model F3-1600C9D-16GRSL | Shopping from Microsoft Start