I was just looking to buy an upgrade for my Thinkpad's processor,
and noticed that prices for Mobile Pentium 4-M chips are reasonable
until 2.5Ghz, where they jump by around $200 suddenly!

Does anyone know anything about the architecture of these chips
that would justify this massive jump in price over 100Mhz?

Also, what is the difference between "Mobile Pentium 4" and
"Mobile Pentium 4 - M" chips? Intel seems to designate them
differently.

- Tim

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