4GB DDR3-1333MHz Registered ECC Dual Rank x8 1.35V 240-pin RDIMM

AddOn Networks 49Y1425-AM. Component for: PC/Server, Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR3, Memory clock speed: 1333 MHz, Memory form factor: 240-pin DIMM, ECC