How to calculate the FSB frequency of DDR1, DDR2, DDR3, DDR4?

Question

Iron

Please tell me how to calculate the FSB frequency DDR1, DDR2, DDR3, DDR4

Answer 1

DDR - Double Data Rate, i.e. in one request from the processor - two requests to the memory. Accordingly, the operating frequency of DDR memory is always exactly twice the FSB frequency.