NOSOUP4U: No, it has no preformance difference, i use it, i just set all my drives to cs, then when i interchange drives, no setup is required, of course you have to have a cs cable to do this, if you look on your cable, it shou ld look likr there is wire missing out of one of your wires in your ribbon cable, if so, it IS a cable select capable cable, if not, go buy one, they're cheap, cheap, cheap, your drive on the end of the cable is master, and the drive in the middle is slave, as you probably have guessed. anyway, thats enough talking out of my @$$ for now, c ya guys.