In this paper, the authors conducted an experiment to show the impact of overclocking the CPU (Central Processing Unit) to the genetic algorithm. For the CPU part, they have used Intel core 2 duo E6420, its original frequency is 2.13 GHz, and they have succeeded to hit 3.20 GHz which is about 50% boost. For the genetic algorithm part, they have used the Rastrigin’s function, which is often used to test the genetic algorithm. The number of generation is fixed to 5000 generation. They implement the function by using MATLAB R2009a.