Kingston ValueRAM 8GB Kit (2x4GB) 1333MHz DDR3 Non - ECC CL9 SODIMM SR x8 Notebook Memory KVR13S9S8K2/8 One kit of two 4GB modules of 1333MHz DDR3 Memory We highly recommend checking with your computer model and manufacturer to ensure compatibility with high density memory modules 204-pin Unbuffered SODIMM From the industry leader in PC Memory Backed by a lifetime warranty and free technical support