Sacado de la página 25 de la guía de diseño térmico del P4 de Intel:
"Processor power dissipation simulations indicate a maximum application power in the range of 75% of the
maximum power for a given frequency. Therefore, a system designed to the thermal design point, which has been
set to approximately 75% of the maximum processor power would be unlikely to see the thermal control circuit
active and experience the associated performance reduction. Systems designed for lower power dissipation could be
subject to activation of the thermal control circuit depending upon ambient air temperature and software application
power profile. Figure 13 plots processor performance with the Thermal Control Circuit enabled versus system
cooling capability. System designers must evaluate the tradeoffs between cooling costs and risk of processor
performance loss to determine the optimum configuration for the end user."
Es decir, si se excede del 75% del consumo máximo salta el throttle. Lo que si es verdad es que por bios se puede desactivar.
Lo que no se desactiva nunca es el control de temperatura máxima que hace que el micro se desconecte para prevenir su tueste.