ecs 780gm-a power issues

I was wondering if anyone has experience with an ECS 780GM-A motherboard. I just received mine new and I only have a 20 pin power connector and one 4 pin connector, the board has a 24 pin connector and a seperate 4 pin connector and I am confused as to whether I need to connect the seperate connector or not. I think I read somewhere that You can connect the 20 and for pin to the 24 pin terminal together but what then of the seperate connectorit is described as an ATX connector, and the last four pins of the 24 pin connector are shown as ATX also. Do I need both?