On 15/07/2018 21:48, Johnny B Good wrote:

If any of those power rails are eventually to become obsoleted, it's
more likely to be the +5 and +3,3 volt rails, That "Legacy +12v line"
will most likely become the 'defacto' standard for distributing DC power
to everything in PCs and IT kit in general simply because of the ease by
which the actual chip voltages required can be generated by commodity on-
board dc-dc switching regulator chips.

The voltages required by digital chips will be lower and so a 3.3V power
supply will be more than adequate for all future semiconductors and
solid state storage devices. Today it's common for the core of many
large semiconductors to be running at 1V (or lower) and the interfaces
at 1.8V. The 3.3V is kept for interconnects for legacy purposes.

As technology moves on the required power supply voltages will be lower.


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