Dynamic voltage scaling is a power management technique in computer architecture, where the voltage used in a component is increased or decreased, depending upon circumstances. Dynamic voltage scaling to increase voltage is known as overvolting; dynamic voltage scaling to decrease voltage is known as undervolting. Undervolting is done in order to conserve power, particularly in laptops and other mobile devices, where energy comes from a battery and thus is limited. Overvolting is done in order to increase computer performance, or in rare cases, to increase reliability.
The term "overvolting" is also used to refer to increasing static operating voltage of computer components to allow operation at higher speed (overclocking).
Read more about Dynamic Voltage Scaling: Background, Methods, Undervolting, Power, Program Execution Speed, Implementations, System Stability, Temperature, Caveats
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