Well...in comparison between onboard PC128 and outboard PC128 your probably not going to notice a difference, because I dont think either take the load off the processer. Now if you were to compare onboard C-Media to say an Audigy or Gametheater XP you'd notice a pretty big different in CPU % in games, but even my onboard sound doesnt ever take up more than 10% of CPU power even with all the features turned on in games. But your better off with outboard