Kingston ValueRAM 12GB Kit (3x4 GB) 1600MHz DDR3 ECC Reg CL11 DIMM DR x8 Server Memory KVR1600D3D8R11SK3/12G Three 4GB modules of 1600MHz 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