for board power we included the option of using either 4 pin molex or your common 12v dc barrel jack connector like what they use on the bitforce single.

As we do not provide power supplies for these units we wanted to make sure everyone would be able to power their units in the way that they wished.

My personal opinion would be to

buy something like this:

https://www.bitcoinasic.net/index.php?route=product/product&product_id=54

which is a highly efficient and top notch PSU - as far as I know the only PSU certified to platinum efficiency status is Seasonic.

I personally use these on my fpga rigs - one of these 1000 watt babies will easily power 8-10 54Gh/s bASICS