Have you ever wondered what 3nm and 4nm monikers mean for a chipset? These represent the size of the transistors inside the chip. The "nm" stands for nanometer, which is one billionth of a meter. The smaller the size, the better the chip. Chipmakers are racing to make chipsets even smaller. Smaller transistors in chipsets also use less power, hence making the chipset more efficient. They also generate less heat and can perform calculations faster. That's why modern smartphones can now run demanding games and apps smoothly without overheating.