Overclock the Raspberry Pi
Overclocking is a process of forcing a computer component to operate faster than the manufactured clock frequency. This is done to increase the operating speed of the computer component, but it comes with a risk – the component can be damaged due to excessive heat or overvoltage.
raspi-config enables you to set the clock speed and voltage of your device to several different levels. To do this, select the Overclock option in raspi-config:
Read the warning and click Ok:
Next, select the overclock level. Note that overclocking too high may result in instability and reduce the lifetime of your Raspberry Pi.
It is recommended to reboot your device after overclocking. If you encounter any problems, hold down Shift when rebooting. This will disable overclocking.