Explain further: Input devices Storage devices – HD Output devices
What is a chip? Contains and Integrated circuit, a very tiny piece of silicon with electronic circuits. CPU and Memory (RAM and ROM) come in chips.
One MHz represents one million cycles per second. For example, a microprocessor that runs at 200 MHz executes 200 million cycles per second. Each computer instruction requires a fixed number of cycles, so the clock speed determines how many instructions per second the microprocessor can execute. To a large degree, this controls how powerful the microprocessor is. One GHz represents 1 billion cycles per second.