Hello, I have one of these powerers and made custom sleeving for necessary cablings. Conclusion was that "The pin 6" from 18 pin connector is actually used and 12V on original cables rather than generally suggested "not connected". Old post but was actually the first one when I started to search for pinout. EVGA really should give those pinouts to modders. Thats atleast one of the reasons why I love EVGA, that it is friendly for modders like my self.
 
Partly gredit to original post that also helped me out.
ääh. Also overclock.net have thread with "Repository Of Power Supply Pin Outs." where other pinouts for the psu is visible.