8GB 2 x 4GB DDR3 Memory for Lenovo IdeaPad N Series N580 N581 N585 N586 Series PC3-10600 1333MHz 204 pin SODIMM Laptop Notebook RAM (PARTS-QUICK BRAND) 8GB PC3-10600S DDR3 1333MHz 204 pin SODIMM for Lenovo IdeaPad N Series N580 N581 N585 N586 Series Capacity: 8GB 2 x 4GB Kit Speed: PC3-10600 DDR3 1333MHz Form Factor: 204 pin SODIMM Halogen Free; ROHS Warranty: Lifetime