Additional thanks to Naples/Richard.
Since the typical Celeron has a high clock speed, am I to assume that slower PIVs with sick memory are converted into sand, not into Celerons? That would be in recognition of the architectural problems.
Maybe they also use this cripple technique for PIVs which are sick enough that they can't multithread.
There must be a bunch of fuses to select which sections to keep to convert a PIV into a Celeron.
Thanks for the insight.
A bit off-topic, but I wonder about the yield on such complex chips. Dull 7400-series chips approach 100% yield. Yield of fully functional PIVs must be much, MUCH poorer if Intel goes to the trouble of laying them out in a way that they can shed bad sections and make Celerons.
Bob