DeviantPC has posted an article explaining everything to do with system buses.

It should have hopefully become apparent that there are many pitfalls when deciding on a new computer system, for both home users and businesses alike. As always, technical details are buried under a big pile of marketing. Minor advancements in technology that in reality, do nothing are heralded as the "next big thing". A quick look under the surface however, shows this not to be the case.

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