Hmm sotc do you have a pdf of your mobos manual? Or if you give me the model number I could find one on the web I'm sure. I could take a look. It sounds like you need a power supply with a 20+8 (or 4+4)pin for the mobo, maybe? Because you mentioned 20-8..I'm sure SOS will be of better help.

But if you give me the link to your psu and the link to your mobo I will take a look and see if i notice any problems or solutions.

__________________
"Squeezing a guys jolly roger with your hey nani-nani means dollars" -Howard Stern to Jessica Hahn