DRAM
Type Transfer Rate Comment
SDR
DDR (memory bus clock rate) × 2 (for dual rate) × (number of bits transferred) / 8 (number of bits/byte) memory clock rate = memory bus clock rate(I/O bus clock rate)
DDR2 (memory clock rate) × 2 (for bus clock multiplier) × 2 (for dual rate) × (number of bits transferred) / 8 (number of bits/byte) (memory clock rate) × 2 (for bus clock multiplier) = (I/O bus clock rate)
DDR3 (memory clock rate) × 4 (for bus clock multiplier) × 2 (for data rate) × (number of bits transferred) / 8 (number of bits/byte) (memory clock rate) × 4 (for bus clock multiplier) = (I/O bus clock rate)
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License