So I'm a little late to the party but have a few newbish questions I hope someone doesn't mind me answering. I've had a search on the forum and on google but can't seem to find the answer I'm looking for.

I have an Antminer S5, overclocked and draws 660w from the wall. Can I use a two dual PCI-E cable to power both boards? Or is 330W too much to put through a cable with 18AWG wire?

I've seen alot of people using the dual cables, but not sure if they're overclocking, underclocking etc, so thought it safer to ask the question before I have an accident.

The reason I ask is that I've been using my PC's PSU while a CX750M was on order. My computers PSU is semi modular so already had two PCI-E power cables already connected which I plugged into two of the inputs on the S5. I then connected up two extra pci-e power cables for the remaining two inputs on the S5. The PCI-E cables I have are 8 pin at the PSU end, and 6 at the other. The CX750M I have on order only has two 8 pin PCI-E sockets and four 6 pin PCI-E sockets. All my PCI-E cables have 8 pin connectors at one end, so it appears the only option at the moment is to use two dual 6 pin PCI-E cables. Or can I buy some cables to make use of the 6 pin sockets on the PSU?

Thanks in advance (newbie, be nice )