Hey Guys and Gals...if applicable

,
Can someone answer a question about the GPU node?
I'm considering buying one, however it says it uses or needs two 8pin connectors... Does this mean you can only use GPU's that have 2 8 pin connectors or are dual 6 pin GPU's supported as well. And it just uses the 2 8pins for whatever reason?
I can't seem to find any documentation about it, and the video does not cover the GPU node.
Any explanation would be greatly appreciated.