@Fizzzzle Did you get this figured out? If I'm understanding correctly, it sounds like you're missing the 4-pin CPU power, right? Your PSU should have come with the correct cable, and if not you should be able to find one online, either through a retailer (e.g. Amazon) or by contacting the manufacturer. Just be aware that the cables on modular power supplies are unfortunately not necessarily standardized so you'll need to make sure and get the right one for the manufacturer.