Per bytes RAM memory acess

Posted by b-gen-jack-o-neill on Super User See other posts from Super User or by b-gen-jack-o-neill
Published on 2010-05-07T16:44:20Z Indexed on 2010/05/07 16:48 UTC
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Hi, I have just a simple question. Today memory DDR chips are 64 bits wide, and the CPU data bus is also 64 bits wide. But memory is stil organised in single bytes. So, what I want to ask is, when CPU selects some memory adress, it should be one byte, right? Becouse the lowest memory portion you can access is 1 byte. But, if you get 1 byte per 1 adress, why is memory bus 8 bytes wide?

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