4 Pin atx has less cables right? I saw from you picture you did the following config:

1 yellow
1 yellow
2 black
2 black

with 4 atx I can only do

1 yellow
1 yellow
1 black
1 black

and with 6 pin to 4 molex
1 yellow
1 yellow
2 black
1 black

Isn't 6 pin better?

I guess I can just chop the power supply but it has 2 8 pins. Any idea how I should go about it? Heres the power supply I have. I have to power 3 blades

http://www.amazon.com/Corsair-430-Watt-Certified-Compatible-Platforms/dp/B004W2T2TM