8GB DDR3 Laptop Memory Upgrade for Dell Inspiron 15R (5520) Notebook PC3-12800S 204 pin 1600MHz SODIMM RAM (PARTS-QUICK BRAND) 8GB PC3-12800S DDR3 1600MHz 204 pin SODIMM for Dell Inspiron 15R (5520) Notebook Capacity: 8GB Speed: PC3-12800 DDR3 1600MHz Form Factor: 204 pin SODIMM Halogen Free; ROHS Warranty: Lifetime