Flickering faces in Edit mode 2.83 I have this issue from the 2.83 update. I tried a couple of things but nothing seems to fix it. Here is a short video of how it looks. Video

Also if I move my mouse over the XYZ on the top right the faces become see-through even though the option is disabled. The see-through disappears when I move the camera around. You can see this at the very end of the video, although my mouse doesn't seem to pass the XYZ. It worked 100% of the time when I hovered over XYZ when I retested it.
I had the exact same behavior and it came out of nowhere.

Pixelated diagonals over faces
Faces flickering from gray to orange when selected
Strange see-through

I already worked in the same version of Blender (2.83.0) before on the same computer without this problem.
Solved it by uninstalling Blender and reinstalling version 2.83.2