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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.
A fuse is just an electronic component. It can be used for circuit protection, but it doesn't have to be. For example, a transistor doesn't have to be an amplifier, a resistor doesn't have to be for dimming bulbs, etc.