I just bought a Gigabyte GA-P55A-UD3 mother board and an Antec BP550 Plus power supply. When I was connecting the ATX 12V connector from the power supply (which is two 2x2 connectors) I noticed that the connector on the mother board is keyed in such a way that only one of the 2x2 connectors plugs in.
Is there some sort of adapter I need to get to make this work? Would it be disastrous to only connect one of the 2x2 connectors? Do I just need a new power supply?