4GB DDR3 Laptop Memory Upgrade for Gateway NE Notebook NE56R31u PC3-12800S 204 pin 1600MHz SODIMM RAM (PARTS-QUICK BRAND) 4GB PC3-12800S DDR3 1600MHz 204 pin SODIMM for Gateway NE Notebook NE56R31u Capacity: 4GB Speed: PC3-12800 DDR3 1600MHz Form Factor: 204 pin SODIMM Halogen Free; ROHS Warranty: Lifetime