What technique involves modifying the clock frequency to reduce power consumption?

The technique that involves modifying the clock frequency to reduce power consumption is dynamic frequency scaling. This method allows a system to adjust its clock speed according to the current workload, enabling it to operate at lower frequencies when full power is not necessary. By doing so, the system can significantly decrease energy consumption, leading to better overall efficiency without sacrificing performance during low-demand periods.

Dynamic frequency scaling is particularly effective in environments where power efficiency is crucial, such as in mobile devices or embedded systems, where battery life and heat generation are important considerations. This capability also permits the system to ramp up the clock frequency when higher performance is required, ensuring that it can meet varying performance needs as they arise.