I started a dialog with parts@ and got a reply from
tim@hashfast.com regarding getting the manufacturing files, firmware and sales process. +1 to know their historical yield on boards as this is a non-starter if the yield is low.
He states:
"Once you purchase Golden Nonce ASICs, you will be provided the manufacturing files (schematic, BOM, and PCB layout files/Gerbers) for the mining board. The tools and software is already available at
https://github.com/hashfast .
Please provide me your address, and phone number and I will get an order confirmation sent to you for the Golden Nonce ASICs along with enough of the 5 hard to find parts to build boards. Once we have received payment, I will send you the manufacturing files."
Completely useless until when they release the design of their board under public domain. Firmware included. And I wanted to see both the evo and the new half costs version.
Even after that, you would have to add PSU and cooling. $200. And you are being optimistic in your per board cost. $300 is. You could probably reach that price if you had the PCBs for in hand for free. So $300 + $168 + $200 for 650GH. Plus the yield, plus whatever could go wrong since that you will have to deal directly with suppliers. Good luck.