dont wire your fans in series. You'll either burn out your motherboard or the controller and/or, at the very least, they won't even spin. Remember that just because the wires go from one fan to the next in a chain, it doesnt mean its wired in series. Series is when you use the black wire (ground) of one fan and hook it to the red wire of the next.

If you simply run the wires to the first fan, then jump all the wires (color for color) to the next fan, and to the next, etc etc, it is still in parallel, even though all the wires aren't coming to the 'same spot'.

I had to mention this because from your diagram of 'series' wiring, you don't show the connections, which is the only place where it might become 'series'. As per your 'series' diagram, if you connect the reds to reds, and blacks to blacks, then that is not series at all, it is perfect parallel.