I'm not sure i"m gonna do it but i'd like to know how I can OVERCLOCK to the maximum SAFELY the ANTMINER S7? 
If I had an S7 & if it was a 4.86TH unit and if I was going to overclock it I would adjust the psu to be 12V + 5% (12.6V) at the PCIE connectors then take it up a step at a time, check for HW errors and keep a close eye on the temperatures. Theoretically from the BM1385 data sheet about 725MHz should be possible, but with them reducing the spec for some Miners that is more uncertain than usual.
The above just my thoughts and in no way a recommendation, Overclock at your own risk. I am sure someone will hae tried it and have some real experience, but may not share until Warranty has expired.
Rich
to follow up on this here is a great psu on ebay on a great sale
http://www.ebay.com/itm/191698868004?
I ordered one this is a 350 usd psu
http://www.trcelectronics.com/View/Mean-Well/RSP-1500-12.shtml
https://www.trcelectronics.com/ecomm/pdf/rsp1500.pdf
it should range from 10 volts to 13.5 and is 87 % efficient . I should be able to do full volt testing with it on my s-7's
I do not know the seller and I hope he is good.
Also if you want to do voltage testing on any gear fuckups
to youself
to other people
to pets
and property are all on you.
Not me for pointing out where to get a quality testing psu at a discount price.