Kingston Technology ValueRAM 16 GB Kit of 4 (4x4 GB Modules) 1333MHz DDR3 PC3-10600 ECC Reg CL9 DIMM SR x4 1.35V Intel Server (KVR13LR9S4K4/16I) Kit of 4 4 GB modules of 1333MHz DDR3 Memory Specifically designed and tested for compatibility in various devices 240-Pin Registered DIMM From the industry leader in PC Memory Backed by a lifetime warranty and free technical support Intel Certified