I have the same 'stuttering' thing on mp. Its was just the cpu bound of the game. Just oc more and it will go away. When you are at 100 fps and an explosion happen and your fps drop to 35-40 fps then ofc you will experience stuttering.
If you want to use radeon pro. Download the preview one. Then just add a profile of bf3 then go to tweaks and then use dynamic vsync or dynamic framerate cap.