i am planning on upgrading my processing from an athlon 2500+ to possibly an athlon 64 x2 4200+ soon. whatever it is i upgrade to will be an athlon 64 x2, in any case. i currently am using the danger den Maze 4 for athlon xp processors. is it necessary for me to upgrade to the maze 4 for athlon 64 processors? is there any difference between them beyond marketing?