Question I have a gigabyte z390ud mobo hookup question

Jun 6, 2019
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I notice on the board that there are two headers for the atx12v one is 2x4 beside it is a 2x2 pins.My psu does not have any 2x2 connectors so am I just to hook up the 2x4 appreciate the help.My psu is a deepcool650.what is the 2x2 for? thanks