CPU

The Central Processing Unit (CPU) is the core computational engine: it fetches, decodes, and executes program instructions, driving all system operations.

The CPU acts as the primary processor, executing program instructions via a continuous fetch-decode-execute cycle. Key components include the Arithmetic-Logic Unit (ALU), which handles calculations and logic; the Control Unit, which orchestrates data flow; and registers, which provide high-speed temporary storage. Modern CPUs, such as the Intel Core i9 or AMD Ryzen 9, integrate multiple cores (e.g., 8-16 cores) and threads onto a single microchip, significantly boosting parallel processing capability. Clock speed (measured in GHz) and cache size (L1, L2, L3) are critical performance metrics: higher values mean faster instruction throughput and quicker data access for operating systems and applications.

https://en.wikipedia.org/wiki/Central_processing_unit