As long as a CPU's temperature stays below the manufacture-specified maximum, does a CPU's average temperature affect its lifespan?
For example, my laptop's maximum CPU temperature as specified by Intel is 100(C). If I run it at 90(C) for a period of time vs. running it at 40(C) for the same period of time, will there be a difference in how much of the processor's life that has been used up?
Is there credible scientific research on this subject?
My reason for asking this is that I am trying to determine whether to increase my default fan speeds in order to lower the temperature that my CPU idles and works under light load such as typing this question.
P.S: even though I've tagged this 'overclocking', this question is not concerned with the effects of overvolting a CPU.