DELL 4GB DDR3 SO-DIMM, 4 GB, 1 x 4 GB, DDR3, 1333 MHz, 204-pin SO-DIMM DELL 4GB DDR3 SO-DIMM. Component for: Laptop, 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: 204-pin SO-DIMM