is what you need to use. The thing here is to find out where the adapter connection should fit into. So how about give us a description of it.
So I have a Seasonic 620w 80+ Bronze Certified Fully Modular Atx power supply and just got my new Evga Gtx 970 4gb 2.0 Superclocked graphics card. I looked into my manual and it tells me to plug in a 6 pin pcie cord and an 6/8 pcie cord but when I look on my card I have two 6 pin slots. So I figured I would try my two 6/8 pin pcie cords(that came with psu) and just plug in 6 pin each side. When I tried booting my computer wouldn't even power up so I immediately unplugged everything. Second try I use just one 6/8 pin pcie cord without the extra 2 pins and it boots but displays the message "plug in additional power cords.' Once again I unplug everything and try to add the additional 2 pins but they just don't seem to fit. I was sent two 6 pin pcie cords but they're some type of adapter that I'm not familiar with. I'm wondering what cords I should be looking for so I can get my baby up and running again. Thank you!