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Transition from parallel to serial almost sounds like a misnomer, that is, the two standards are mutually exclusive and a real transition would involve intermediate steps that instead of the best of two worlds would most likely just add another can of worms to the snake pit of meandering traces. However, despite the fact that the overall concept and the design rules are totally different, there will be a transitional period. That is, we will be looking at some parallel drives using onboard translators to enable serialization and de-serialization of data at both the sender and receiver end. In addition, we will see some bridge adapters that can be used to connect older parallel drives to serial interfaces.

Bridge solutions will not show any performance improvements, however, it should be clear that, at least, they eliminate the electrical problems of ribbon cables and further have the advantage of easier routing, EMI suppression and improved air flow through the case. The importance of the latter point cannot be stressed enough, since, as we reported some 5 years ago, local heating of individual memory chips on a DIMM caused by obstruction of airflow by a ribbon cable can have detrimental influences on the overall speed of a memory module.

In addition, every other low life mainboard manufacturer will claim the invention of bridge solutions, names like seriallel and other nonsense have been popping up like mushrooms in the infomercials sent out in form of press releases.

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