Any good references that explain graphics to GPU architecture ?

Any good references that explain graphics to GPU architecture ?
I know this can be a sensitive information, but I’m just looking for a high-level description if there is one.

Only sources that I could find is very “old” graphics pipeline stages from DirectX stuff from SW point of view.
I’m just a bit confused how those really get mapped to CUDA architecture.
Those SPs will do the graphics work, but what about those texture units ? Are they just used for reading texture data and filtering ?

Just a high-level info or documents will be good.
Thanks !