Kingston Technology ValueRAM 48 GB Kit of 3 (3x16 GB Modules) 1333MHz DDR3 PC3-10600 ECC Reg CL9 DIMM DR x4 1.35V Server Memory (KVR13LR9D4K3/48) Kit of 3 16 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