1. Graphics card manufacturer official website: Graphics card manufacturers often provide detailed specifications and design structure of graphics cards, including circuit diagrams, in official website. Some well-known graphics card brands, such as NVIDIA, AMD, ASUS, Gigabyte, MSI, etc. , all have circuit diagram resources, just go to official website to check.

2. Related technical forums: In some technical exchange platforms or forums, such as Zhongguancun online forum, some technical leaders will share their research contents on graphics cards. In these forums, you can search for some shared download links by keywords, so as to obtain circuit diagram resources.

3. Professional technical books: Some computer books also have the principle analysis and circuit design of graphics cards. You can get circuit diagram resources by reading these books or buying e-books.