>A dual core CPUs actually cause themselves a bottleneck if they only have ONE 
>bus to communicate to/with the outside world. This becomes another design 
>issue that while producing apparent processor speed has to balance out against 
>the ability of the bus (or buses) to handle data flow (which gives effective 
>processor speed)

According to somebody I know from IBM Canada's Lab, all mainframe chips are 
dual core, but better.
They don't only duplicate the core, but all connections to the world outside 
the chip.
Including buses.

I guess they learned after AP's in the late 1970's.

-
Too busy driving to stop for gas!

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