Kingston Technology ValueRAM 64GB Kit (4x16GB) 1866MHz DDR3 ECC Reg CL13 DIMM DR x4 with TS Server Memory KVR18R13D4K4/64 64GB Kit (4x16GB) of 1866MHz DDR3 Memory 240-pin Registered DIMM From the industry leader in PC Memory Backed by a lifetime warranty and free technical support