What is CPU
Central processing unit-CPU A CPU, or central processing unit, is the brain of a computer. It is responsible for executing instructions that make up a computer program, and is the primary element of a computer system that performs most of the processing. The CPU is a complex piece of hardware that consists of multiple parts, including the control unit, the arithmetic logic unit (ALU), and the registers. The control unit fetches instructions from memory, decodes them, and then sends them to the ALU for execution. The ALU performs the actual computation, using the data stored in the registers. The speed and performance of a CPU is measured in terms of its clock speed, which is the number of instructions it can execute per second. Modern CPUs have clock speeds that range from a few gigahertz to several gigahertz. There are two main types of CPUs: single-core and multi-core. Single-core CPUs have only one processing unit, while multi-core CPUs have multiple processing units, allowing them