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Computer Architecture

A computer is a machine that can be programmed to input, process, and output useful information, or either store it into a secondary storage device. The processing of input to output is directed by the software but performed by the hardware.

A computer is mainly composed of a processor and Random Access Memory (RAM). RAM is used to store instructions. The processor, also known as the Central Processing Unit (CPU), fetches instructions from RAM, manipulates data from memory, and performs corresponding calculations.

x86 Processor Architecture

Others (CISM(Complex Instruction Set) and RISM(Reduced Instruction Set)

1. 32-bit (x86)
2. 64-bit (x86–64)
3. 64-bit (IA64)
4. 64-bit (AMD64)

This article will explain x84-x64 architecture, which is the most widely used in the market.