Samsung DDR2 3GB PC1333, 3 GB, 3 x 1 GB, DDR2, 1333 MHz, 240-pin DIMM Samsung DDR2 3GB PC1333. Internal memory: 3 GB, Memory layout (modules x size): 3 x 1 GB, Internal memory type: DDR2, Memory clock speed: 1333 MHz, Memory form factor: 240-pin DIMM