Do you have an example of such shrink besides Deneb at 45nm? History of AMD shrinks(90nm, 65nm) teaches that they give 10-20% lower clock at start. And speaking of Deneb, it seems to me it was more Agena's failure, but not a Deneb's win. AMD had plans for 3GHz Phenom, but TLB-bug leaved no time to develop frequency-optimized stepping of Agena before Deneb. So 3Ghz Phenom vs 3Ghz PhenomII would mean no clock increase with shink at start.
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