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AMD's New Threadripper Chips Have a Hidden Fuse That Blows When Overclocking Is Enabled
(www.extremetech.com)
This is a most excellent place for technology news and articles.
So the purpose is to protect them if someone overclocks and fries it, meaning they know if you take it in under warranty and say you want this faulty part replaced?
pretty much, also stops any techs or engineers looking into possible problems of the product from spending hours wondering what went wrong before the user says (if at all) "oh yeah, i overclocked it btw".