Warthis :
Are you talking about something like this:
http://i.imgur.com/m9zyJgo.jpg
youll have to spin that cable round,its the wrong angle to tell.
irregardless with both a 380 & the 970 (power requirements are pretty much identical on both) you 100% need the cable configuration I put in the picture above as a minimum - meaning 1x 6 pin & 1 x 6+2 pin powr connectors.
None of us have any idea whatsoever what kind of quality that unit is - the 12v rail specs on the label make it seem as if it would power just about any setup but in all honesty ( not meaning to sound at all rascist) when I see a made in china badge & no real sign of actual manufacturer branding it really does not fill me with confidence