Kingston ValueRAM 4GB 1333MHz DDR3 Non-ECC CL9 SODIMM SR x 8 Notebook Memory Card KVR13S9S8/4R One 4GB module of 1333MHz DDR3 Memory 204-pin Registered DIMM From the industry leader in PC Memory Backed by a lifetime warranty and free technical support Specs are standard non - ECC 204-pin Registered SODIMM SR x8 Retail (DDR3, 1.5V, CL9, FBGA, Gold).