I'll try it first with the single 12V 4 pin connector since that's the original power supply built in into the case (antec fusion black 430) . Fortunately I just found out that i have another power supply (Hiper 580W sli ready psu) somewhere which should have the 8 pin 12V connector so in the end I should be fine. I still have to buy the mainboard, is it indicated how to connect the 4 pin connector?
Thanks for your quick anwer!