If one subject is surrounded by myths, it is overclocking. It would be dangerous and destroy your Raspberry Pi. This article provides the essential background, after which you can safely overclock the Raspberry Pi to 2.1 GHz.
The BCM2711 chip on the Raspberry Pi 4 consists of millions of transistors. They are all MOSFET (metal-oxide-semiconductor field-effect transistor).
When a positive voltage is applied to the gate, negatively charged electrons inside the body are drawn just under the gate insulator, thereby forming a conductive tunnel between the source and the drain. The state is ‘on’. Removing the voltage on the gate and the MOSFET switches off again. The insulator between the gate and the body ensures that almost no current is needed to control the transistor. That explains why, for instance, pocket calculators can work years on a single battery.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
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