4GB DDR2 PC2-6400 Unbuffered Module
Mushkin FH977AA-MU, 4 GB, 1 x 4 GB, DDR2, 800 MHz, 204-pin SO-DIMM
Mushkin FH977AA-MU. Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR2, Memory clock speed: 800 MHz, Memory form factor: 204-pin SO-DIMM