I'm currently in the process of building my first pc and am down to buying a cpu.  Many of the online stores do not mention if the cpu is Northwood or whether it's Prescott.  One thing I have noticed is it seems the Northwood mfg process is .13 micron and the Prescott is .09 micron.  Is this a false assumption?  How can I be sure if the spec or product is not listed?

Thanks

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