So I'm building my first PC right now, and I'm really confused and annoyed because none of the cables seem to be the right cables. My biggest problem right now is the CPU Power cable. I have a Z170-A Pro MB and an EVGA Supernova 650 G2 PSU. The cables that I have that came with the PSU for connecting the CPU are an EPS/ATX12v 8(4+4)-pin and an 8-pin + 8(4+4)-Pin CPU adapter. when I plug the 8-Pin side of the second connector into the PSU, the 2 4-Pin ones don't fit into the motherboard. Can anyone help me with the wiring? Thanks.