4GB DDR3 Memory Upgrade for ASUS NX90 Series NX90Jq Notebook PC3-10600 204 pin 1333MHz Laptop SODIMM RAM (PARTS-QUICK BRAND) Capacity: 4GB Speed: PC3-10600 DDR3 1333MHz Form Factor: 204 pin SODIMM Halogen Free; ROHS Warranty: Lifetime