How should i connect my mobo to PSU

Hello,

I'm in a middle of building of my PC and don't know how should I connect my Intel mobo Link with my Corsair TX 650W Link

I've found this Link and I'm confused now. I don't know whether i should use 2x2 12V power connector or 2x4 12V power connector.

I've always use 2 x 12 pin main power connector and 2x2 12V power connector now I don't know which one apart from 2 x 12 pin main power connector should i use.

I have i5 core 2500k

Need your help should i stick to 2x2 12V power connector or what ?