With the goal being to understand better the emualtor and to be able to know what settings to change from game to game and to prevent certain failures (to sayit that way), I would like to know the differences between settings. For example what does EFB do? What gives better performance from game to game: texture or RAM? Not only this but also the other settings. If someone could explain this to me it would be much appreciated 
The right man in the wrong place can make all the difference in the world.