Does the FSB connect the CPU northbridge or the northbridge to RAM?

Trying to read up on Wikipedia to learn more about computer architecture in my spare time, and I'm a bit confused about what exactly the FSB is:

Here: http://en.wikipedia.org/wiki/Chipset#Recent_Developments Wikipedia says: "The lanes connecting the processor and system memory are known as the front side bus (FSB)"

While here: http://en.wikipedia.org/wiki/Front-side_bus Wikipedia says: "It typically carries data between the central processing unit (CPU) and a memory controller hub, known as the northbridge."

Later on in that page, it also says: "The memory bus connects the northbridge and RAM, just as the front-side bus connects the CPU and northbridge"


Can someone clarify exactly what the FSB is, and why wikipedia seems to describe it as two totally different things? Thanks!
6 answers Last reply
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  1. #1 is a simplification that is kind of true for everyday use.

    #2 and #3 are accurate. The CPU cannot talk directly to the memory.

    If you think this is bad, wait until you encounter bus and clock cycles. :)
  2. technically we don't really has a front side bus anymore as the memory controller has been moved onto the CPU in modern processors. It has been replaced by newer interconnects
  3. does this help?
  4. Yup! Thanks, all. Looking forward to delving into all of this jazz in more detail. While I'm here, does anyone know of a good beginner's reference to consult when trying to learn the basics of computer architecture and CPU microarchitecture? Often the articles I read (and the articles on wiki) are written in a way that expects the reader already has a solid understanding of the basics..
  5. the tutorials on hardware secrets are pretty good, some are a little old but still useful for someone just starting out like you:
    http://www.hardwaresecrets.com/type/1
    they also cover a large variety of topics- audio, cameras . .ect.
  6. Thank you, sir :)
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