All of them are putting out the same amount of power (12 volts if I am not mistaken) so it doesn't matter which one you plug into the card, they will all do the same thing...
i thought that the four pins corresponded to the four voltages that drives need+12,-12,+5,-5 i dont see how one of these could power a drive otherwise 12 is needed for servo motors and 5 for eveything else.correct me if im wrong.
Counter strike- you should have one more lurking in there somewhere.