High Speed:

In an IC, the inter-connections between components are physically small, making high switching speeds possible. The electric currents travel rapid, though not instantly. The faster the charge carriers move from one component to the other, the more operations can be executed per unit time, and the less time is needed for complex tasks.

Low Power Requirement:

ICs usually consume less power than corresponding discrete-component circuits. This is significant when batteries are used. Since ICs draw too little current, they produce less heat than their discrete-component equivalents. This outcomes in better energy efficiency and reduces problems which plague equipment that acquires hot with use, like frequency drift and generation of the internal noise.