16GB 2 x 8GB Kit DDR3 Laptop Memory for Samsung Series 9 Notebook NP900X4C PC3-12800S 204 pin 1600MHz SODIMM RAM (PARTS-QUICK BRAND) 16GB PC3-12800S DDR3 1600MHz 204 pin SODIMM for Samsung Series 9 Notebook NP900X4C Capacity: 16GB 2 x 8GB Kit Speed: PC3-12800 DDR3 1600MHz Form Factor: 204 pin SODIMM Halogen Free; ROHS Warranty: Lifetime