I've recently purchased 2x Antminer S1's at a great price, I also got 2x Switchable 500w Power Supply's included.
I have read the Instruction manual from Bitmain about the S1 and the only difference I can see is that with my setup I don't use PCI-e Connections (even though I have them on the Units) just 12v+ & Ground.
They even have the additional WIFI setup.
I also have these extra little fans that I can't see where they plug into.
I have browsed other peoples rigs & have found similar setups with similar PSU's.
Just wanting to make sure it's all right.
Here is some pictures of what I received but haven't setup.