Since DDR memory in the clock rising edge and falling edge of the transmission of data can, therefore, at the same clock frequency and data-bit width memory bandwidth cases are twice as common SDRAM.

• DDR显存因为能在时钟的上升沿和下降沿都能传送数据，因此，在相同的时钟频率和数据位宽度的情况下显存带宽是普通SDRAM的两倍。