Single Data Rate Random Access Memory SDR-RAM SDR-SDRAM Single Data Rate Synchronous Dynamic Random Access Memory <storage> (SDR-RAM, SDR-SDRAM, Single Data Rate Synchronous Dynamic Random Access Memory) {RAM} or {SDRAM} that transfers data on only one {clock} transition (0-1 or 1-0), in contrast to {DDR-RAM}. (2001-05-24)