To introduce what a GPU is, you must learn better and faster what a GPU is from the comparison and differences between CPU and GPU.
Overall difference between CPU and GPU
CPU：
called central processing unit
It can be understood vividly as 25% ALU (Arithmetic Unit), 25% Control (Control Unit), and 50% Cache (Cache Unit)
Because the CPU involves general calculations, the complexity is high.
1. Summarize it into a small number of complex calculations, just like a professor who knows Mathematical Olympiad and elementary school problems.
2.CPU generally has more than 10 cores, which is equivalent to more than 10 professors, and the concurrency is not high.
GPU：
It's called a graphics processor. Graphics Processing Unit (English: Graphics Processing Unit, abbreviation: GPU ), also known as display core, visual processor, display chip, is a type of processor specially used in personal computers, workstations, game consoles and some mobile devices (such as tablets, smartphones) etc.) to perform image and graphics related operations on a microprocessor.
It can be understood vividly as 90% ALU (Arithmetic Unit), 5% Control (Control Unit), and 5% Cache (Cache Unit)
A large number of computing units: Responsible for simple and crude calculations. He is not good at Mathematical Olympiad questions, but he can do elementary school questions.
A small number of control units and cache units: mainly responsible for adjusting and caching data. The GPU has less demand for these two units, so it takes up less space on the GPU.
1. The design principle of GPU - summarized as a large number of simple operations
2. GPUs generally have thousands of cores, equivalent to thousands of primary school students, and can handle a large amount of concurrency.
Integrated GPU and discrete GPU
Integrated GPU
Built into the computer's motherboard rather than being part of a separate graphics card. It can even be integrated into the CPU itself.
Discrete GPU
The other main type of GPU is the discrete GPU, also called an independent graphics card . This is a standalone graphics processor - usually in the form of a removable graphics card.
The image processing performance of the integrated GPU is generally moderate and not very powerful. You can install a powerful independent graphics card GPU to enhance the image processing performance of your computer.
One disadvantage of discrete GPUs is that they tend to consume more power and generate more heat. Some laptops have both discrete and integrated graphics, using the integrated GPU to save energy. Then, when more powerful graphics performance is needed, these devices switch to discrete GPUs.
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source
What is the difference between CPU and GPU? - Zhihu(zhihu.com)