How creating Multiple Scenes affects CPU and GPU Memory (windows PC build) ?

I am creating a project where am having 8 different games (each in different scene ). Now suppose I am having total 8 scenes running parallely out of which 3 are instances of same scene. For Ex : GameScene1, GameScene2, GameScene3, GameScene1(replica), GameScene2(replica), GameScene3(replica), GameScene1(replica) and GameScene2(replica)

Now I have 8 gamescenes running in which few are replica of other scenes. As per requirement only one gamescene should be visble at a time and user have choice to switch between scenes via icons. So while loading all scenes in starting where unity will store all these in CPU memory or GPU memory.While running when only one scene is visible(I disable all other scene main cameras except current one) so in this case hwo it will affect CPU / GPU memory ?