> b) (I must admit I'm a bit paranoid when notebooks heat up too much,

The subject of thermal shutdown on 2400s, especially with the Newer G3-240
is a subject I've warned on more than once.

The phenomenon that kills CPUs and allows those repair outfits with a
surface mount soldering machine (such as DT&T has) is called
"electromigration". Electromigration is driven by excessive heat, which is
itself exacerbated by bus overclocking or higher backside cache speeds, and
leads to progressive failure of potted microcircuits (non-repairable) and
soldered pins (repairable).

The technically curious can check out this link:

http://www.csl.mete.metu.edu.tr/Electromigration/emig.htm


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