what do u mean by 'throttle' here?
cpu can tahan until 100-105 degree celcius ... different chip different number but around 100 same as water boiling point
that is called tjmax where automatic shutdown occur
when it reach around 95+ it will start to throttle i think .... which it drops speed to keep the heat output balanced with the (weak) heat dissipation capability
this feature happens much more often on laptop , those 65watt quadcore i7 cannot sustain full clockspeed during gaming load for hours .... often because the limit is set too conservative
these laptop gamers will report laggy or choppy framerate when the clockspeed drops , somebody programmed a software called "throttlestop" to raise the tdp cap by intel