To enter the "Avalanche" processes that Pravin was talking about would require the silicon to be at or above 150C or so, which is very unlikely. Of course a P4 is going to throttle well before it gets anywhere near that temperature. I think throttling starts at 70 or 80C.. as such we don't really need to worry about those mechanisms we were discussing.
Throttling makes sense as a guard against a failed fan, but not really as a speed governor - kind of works against producing faster grades. For instance, if some chips start hitting runaway temperatures under load at 3.4GHz and throttling is 100% guaranteed when the processor is loaded then tell us again why we paid a premium for such a fast chip?
(Then there is the peculiar load called benchmarks...)
Thus I'd expect Intel to keep their release speeds under the point where excessive throttling would be needed under load.
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