I ran into the same problem when I had to RMA my old NEX750G to a SuperNOVA 750GT to use my older Sata power cables since they're slimmer and easier to work with. I couldn't find anything about compatibility between the two variants' cables. I just manually checked the pins using a Multimeter (continuity) if the pins match up on the other end of Sata power and compared it to my new cable and luckily they were exactly the same. I would do more research or even submit a support ticket if I were you just to make sure or you could do the same as me if you got the experience, which honestly is not that hard. Although be careful with "matching" with higher power cables, you need to at least match up the cable gauge for safety reasons.