Origin Storage 8GB DDR3 1333MHz RDIMM 2Rx8 ECC 1.5V (Ships as 1.35V). Component for: PC/Server, Internal memory: 8 GB, Memory layout (modules x size): 1 x 8 GB, Internal memory type: DDR3, Memory clock speed: 1333 MHz, Memory form factor: 240-pin DIMM, CAS latency: 11, ECC