512Mb: x4, x8, x16 DDR SDRAM Features Double Data .
Micron Technology
MT46V128M4 - Double Data Rate (DDR) SDRAM
512Mb: x4, x8, x16 DDR SDRAM Features Double Data Rate (DDR) SDRAM MT46V128M4 – 32 Meg x 4 x 4 banks MT46V64M8 – 16 Meg x 8 x 4 banks MT46V32M16 – 8 M.