Kingston 16GB (4x4GB) KVR1333D3D8R9S/4G 240-Pin DDR3 SDRAM ECC Registered 1.5V CL9 PC3-10600 (DDR3-1333) 2Rx8 Server Memory (Pack of 4) Number of Modules - 4 Capacity per Module - 4 GB Bus Speed: PC3-10600 (DDR3-1333) Type: DDR3 SDRAM Number of Pins: 240