Why am I getting these jagged artefacts?

Hello fellow Blender enthusiasts, I’m modelling a simple object in Blender 2.9.
When I switch to solid or material preview, I get these jaggies:

Does anybody know what could be the cause of these ?


Could it be clipping issues? Try reducing the range between the clip’s start & end in the sidebar’s view settings.

What are your computer specs, especially the GPU ? A GPU with a TeraScale architecture (which Blender doesn’t support since 2.8) can cause these artefacts.