DDR memory is faster than SDRAM because it can transfer data twice per clock cycle. DDR memory is faster than SDRAM because it can transfer data twice per clock cycle . This means that DDR memory can achieve higher bandwidths than SDRAM at the same clock frequency . For example, DDR3 memory has a maximum bandwidth of 17 GB/s at 2133 MHz, while SDRAM has a maximum bandwidth of 12.8 GB/s at 1600 MHz .