I have one perif plug on my PSU. And 4 SATA plugs.

So you're saying to ignore the SATA plugs entirely. And only use the Perif 6-pin plug? And if in that case, the most I can get out of that 750W PSU is two (MAYBE) three molex connections (on the string of 4)

If I was going to use the risers with 6-pin, what exactly is the cable I need and is it a 6-pin perif cable or a 6-pin sata cable (I'm talking about the labels on the PSU)

I have two EVGA 750W.

Any links to the actual cable would be super helpful...