Just curious, how are you connecting 4 HDDs to that MoBo? There are only 2 SATA ports… I suspect part of the reason why there are so few is the power supply issue. Sorry, there are 4. Two are black and I didn’t see them when I glanced at it 
EDIT: According to this post on the NAS Killer 4.0 thread, a 120w power supply should be sufficient: [Guide] NAS Killer 4.0 - fast, quiet, power efficient, and flexible - starting at $125 - #13 by JDM_WAAAT (look at the 6-Bay Mini ITX NAS section).
Of course, that’s with a 45W TDP processor, and yours is a 65W TDP processor.