IBM 4GB 1X4GB 2RX8 1.5V PC3-10600 CL9 ECC DDR3 1333MHZ VLP RDIMM 44T1596 Storage Capacity: 4GB memory Technology: DDR3 Sdramnumber of Modules: 1 X 4GB Bus Speed: 1333Mhz DDR3-1333/Pc3-10600Cas Latency: Cl9Power Consumption:1.5V Data Integrity Check: Eccsignal Processing: Registered