GPU
What's a GPU and how does it help us?
What Is A GPU?
A GPU or graphics processing unit purpose is to render everything you see on your screen right now but is also used in AI mainly because of it's ability to run in parallel in al of it's cores
A GPU has a lot more cores than a CPU, sometimes even spanning to tens of thousands but their individual cores are not as powerfull as a CPU core -> Each core is a lot simpler than the CPU as they are meant to do specific things while the CPU is meant for general purpose and can do almost anything
How Do Computers Without GPU work?
Well the short answer is they don't
The longer (simplified) answer is that most modern CPUs contain an integrated GPU (Some of them even can run games properly)
I've written most because some CPUs still do not ship with an integrated GPU and require an external GPU like the AMD Ryzen 9 3950X CPU
Why Do We Need It?
Without a graphical processing unit, we couldn't do anything that requires video rendering or a lot of mathematical computations (AI)