Thursday, August 28, 2014

Why is thinner CPU architecture (i.e. 22nm) directly and negatively related to CPU speed?

As CPUs become available with faster speeds, they also come with finer node architecture. Why is this? Could they not just make the CPU larger to accommodate more pathways? I understand that there are some power savings with finer architecture, but why would that stop a company from producing a larger and faster chip that was more power hungry, but intend that chip for wall-powered applications?

I just don't quite get it. Bandwidth, impedance… I'm not sure what other factors com into play…

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