Sorry I don't understand. Do you mean my computer is too good for the game and that is why I am having problems?
No, but the game can't use all of the awesome hardware your computer has at its disposal. For example, the game runs on a 32 bit engine, which means it can only use 2GB or RAM by default.
If it helps I also get that bit of lag when switching between menus for some reason, if it doesn't affect the main game I wouldn't worry about it.