Kingston ValueRAM 4GB 1600MHz DDR3L PC3-12800 ECC CL11 1.35V with TS VLP DIMM Server Memory (KVR16LE11L/4) One 4GB module of 1600MHz DDR3L Memory 240-pin Unbuffered VLP DIMM From the industry leader in PC Memory Backed by a lifetime warranty and free technical support Refer PDF for compatible models