I RMA'd the mother board twice. The first time I thought it was one of the 8PIN connectors that was faulty, The second time was because one of the PROC slots was faulty and also had defective RAM. So I read on another forum that you definitely need to have 2 X 12V 8 pin connectors to power up the board and get it to post. Otherwise it will just power up the fans and that's it. So I got a 4 PIN (12V) to 8 pin connector (again it needs to draw power off of the 12V rail). So after I received the 3rd MB and used the 4 pin to 8 pin connector the board finally posted, upgraded the BIOS, and was able to finish building out the server. I just boxed up the server for shipment so I wont be able to send you a picture of the adapter.
Also I forgot to mention that I bought a 700W redundant power supply ( http://dynapowerusa.com/dyna/ASP/SureStar6_TC-700RVN2.asp
) just in case TYAN support was right.
Let me know if this helps or not...