In the modern era, the comparison between GPU and CPU has now become more important as both organizations and developers extend the limits of AI, HPC, and innovative digital solutions. Whereas Central Processing Units (CPUs) have generally been the core of all types of computing, Graphics Processing Units (GPUs) are quickly emerging as the main supporter of parallel processing. In this guide, we will cover information about the differences between CPUs and GPUs, examine their strengths, and discuss how solutions such as GPU Cloud (AI server, OBS Studio) and cutting-edge GPUs like the Nvidia A100 are constantly transforming various industries.