Unless you prefer eu based company technobit 
I can assure all of you that I am having eight chip coincraft board in hand hashing like I beast 240-250 gh
I can assure all of you that I am having eight chip coincraft board in hand hashing like I beast 240-250 ghAnd pulling around 3W/GH I believe, albeit overclocked, but without even accounting for the PSU inefficiency.
Based on the same chip, AMT are still claiming 0.5-0.75 W/GH at the wall, and thats up from their previous ludicrous claim of 0.25-0.5W/GH.
To quote AMTs favorite shill:
Yes, I do believe the unit will produce up to 1.2THs, running around 600Watts.
The math is very simple dude
1. Chip supplier gives you a figure of power at one volt or whatever chip power is
2. The above figure is taken from simulations not real chips and differs with let say 10 % from reality. When chip is Overclocked the difference is quite big
3. Add at least 10% for cd/cd 12v to 1 and on top 15at least psu loss
There is one slight chance for them to meet their figures if they putt wise as much chips as planned and under clock them. It is too late to do the math right know but they will roughly loose 60 chips costing 100 used each to make it happen and so on and on
Again it will be not their fault the chip needs power that is all
And they are aware of the fact they speak nonces unless instead of 220/120 v in your plugs you happen to have ONE VOLT dc
It is likely the 1.2 THs units will be around 1.1 THs instead of the published.
Cointerra TerraMiner IV was advertised at 2 THs and only delivered like 1.8 THs. A 10% drop from original estimates.
This of course depends if the manufacturer fixes the design to add more chips. Cointerra has much larger chips so it is unable to adjust the design, however bitmine and AMT have a lot of smaller chips, so if they add 10% more, they can hit their targets.
1.2THs, running around 600Watts.
If the quoted 600Wats are at the wall (220V better scenario) I can make 10 BTC bet that they will not make it!!! never!
I am talking about mass shipped units. If they put 300 chips (instead of 40-50) undervolted and underclocked there is a slight chance this to happen. But they will not do it on production units for sure because this costs a lot of money!
Just find a reputable third party person like john to hold our coins
Who has the guts to earn some quick money
Anyone?The best dreamed scenario will be arround 1.2 KW at the wall for 1.2T unit PERIOD!!!!!!!!
At 20GHs per chip, they will need 60 chips. So if they claim .6 W per GHs they are talking around 720 watts.
Any way....I am still taking bets
Some info:
http://bitmine.ch/?page_id=863
Power usage of 0.35 W/GH in low power, 0.6 W/GH in nominal and 1 W/GH in Turbo mode
Supply voltage of 0.65V in low power, 0.765 V in nominal and 0.85 V in Turbo mode
Please note that while we took the highest possible care in doing accurate and conservative simulations, the real performances of the final product could vary by a +/- 20%
You know that 0.6 W/GH is at 0.765 V in nominal voltage right. Best case scenario 0.6w*1.15 (PSU loss 220v to 12V) *1.1 (DC/DC loss from 12V to .765 V i ) * 60 chips as you suggest * 20 GH each EQUALS TO 910 WATS
And the above calculation does not take into account PCB losses at all. Then tell me about GOLD PSU, SUPER efficient dc/dc converters and so on
The beauty of it with each added chip they "increase the power efficiency" decreasing the performance of ALL chips
They can not do it or they can but they will be not able to cover their costs because of additional chips added and more complex design. Which means guess what