PCB design bitcoin miner

Avg Bid (USD)
Project Budget (USD)
$250 - $750

Project Description:
I'm trying to replicate the box you can purchase here: http://launch.avalon-asics.com/#features which is basically a bitcoin miner hardware.

So I need the system design diagram, along with chipsets you feel we can achieve the same / better performance.

Can you do the following:-

1. Design a tech spec which shows whether you can achieve the same

2. match or beat:

Hashrate: greater than 65 Gh/s
Power Consumption: 620w@120v AC

Ideally with what CPU/Chips you feel we can achieve this with.

Skills required:
Electrical Engineering, Embedded Software, Mechanical Engineering, Microcontroller, PCB Layout
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