Kingston Technology ValueRAM 4GB 1333MHz DDR3L PC3-10600 ECC Reg CL9 DIMM SR x8 1.35V with TS Server Memory KVR13LR9S8/4 One 4GB module of 1333MHz DDR3L Memory 240-Pin Registered DIMM From the industry leader in PC Memory Backed by a lifetime warranty and free technical support