oh not very much. The Black has a higher performance yes, but not necessary for gaming. If I were you I'd go with the caviar blue at 7200 rpm. The caviar blue is the sweet spot as it will be able to boot your games fast enough as you'd want. The Caviar green is quiet than the blue but performance far worse for gaming needs. As I said the caviar blue is the sweet spot and would be fine to just store/ install games.