The latter. See also: https://en.wikipedia.org/wiki/Processor_power_dissipation#Sources https://en.wikipedia.org/wiki/Processor_power_dissipation#So... and h

The latter. See also: https://en.wikipedia.org/wiki/Processor_power_dissipation#Sources https://en.wikipedia.org/wiki/Processor_power_dissipation#So... and https://electronics.stackexchange.com/a/33340 https://electronics.stackexchange.com/a/33340