Why does my casino game lag when I switch to windowed mode?

The problem is that when I go to windowed, I get some significant stuttering. More than likely, the game engine or its resolution scaling in windowed mode is not rendering properly. Your graphics card may not be optimized in windowed mode, and/or the scaling of the game resolution to your display size may be causing issues. First, make sure you have the latest version of the game and of your graphics driver. It is possible that your graphics card cannot handle whatever settings you have in the game, particularly if you have set the graphics quality higher than what your hardware can handle. Then, run the game using Borderless Windowed Mode. It will perform much better. Finally, the game engine itself may be the culprit. See if there are any known bugs in the engine or any discussion in support threads about similar issues.

It could be because the game engine doesn’t manage window focus and rendering when in windowed mode. Perhaps the game didn’t optimize for windowed mode. You may want to update your graphics drivers or check if there are any Vsync and anti-aliasing options for windowed mode in the game’s settings. Otherwise, let me know what game you’re playing; it may need a patch. I’m rooting for you! ¾