That’s why it can make the game freeze often, sometimes, even make it crash. Therefore, if you are noticing a significant drop in performance, you should turn Steam Overlay off and if that is to ...

If you own a PC with an Nvidia graphics card at any budget installed, you can take advantage of the Nvidia Game Overlay to access ... You may need to turn this on in the game's settings.

For example, if we're right at 50fps, we might turn down some settings ... If you just want your fps, Steam’s overlay is the easy option, assuming your game is even on Steam.