storehouse3d
good
This model is made in Blender with every object named with appropriate name and saved in multiple file formats to be used in other 3d softwares. If you want you can use this model, for realistic circuit board click this link :
https://www.cgtrader.com/3d-models/electronics/computer/motherboard-3d-model-highpoly
This model has animation and uses some geometry nodes. This model is made blender 4.0.2 and is a stylised type of model. The file formats provided are
Please note that .blend file only has textures correctly. The other formats are provided only for convenience and you have to texture them yourself.