PCIE molex connectors?
That would be pretty rare for you PSU to not have enough connectors. You can use the adaptors that are 6pin molex to the riser card and 4 pin to the PSU sorry not sure what they are called. The old power connector for HDD's and CDroms.
Or there is options with splitters as well. You could buy a cable that would go into your PSU and split into two to power the risers from what I was reading in this thread? As I assume if you have run out then you are using a cable directly from the PSU to the Riser already.
Or if your PSU has more slots for power cables (modular PSU) you can purchase more cables for it.
Thanks for the advice, but I'm still not sure what to do since my PSU will not have enough connectors to avoid me using SATA.
For context, I am using 6 1070s that require a 8pin + 6 pin connector and 6 PCI risers (6 pin PCIE version)
My PSU is 1200w (
http://www.thermaltake.com.au/products-model.aspx?id=C_00002351) and has 8 PCIE, 8 MOLEX and 12 SATA connectors.
This means I need 12 PCI connectors for the GPU and 6 more for the risers. At this point, I'm planning to power the GPUs with the PCI-E connectors and the 8 MOLEX with 2-Molex to 1 6-pin adapters. This means I require the SATA connectors to power the risers.
Another alternative is that I use 8-pin to 2 6-pin splitters, which means I can power 2-4 of the risers with MOLEX.
Will how much power is supplied to the risers matter given the 1070s are already powered by a 6-pin and 8-pin?