I think the OP needs to reconsider the pricing.LargeCoin C200 IMU as offered:
Hashrate: 20 GH/s
Capital Efficiency: $1500 per GH/s
Power Efficiency: 200 MH/W
Size: 1U rackmount spaceBFL RigBox
Hashrate: 50 GH/s
Capital Efficiency: $600 per GH/s
Power Efficiency: 25 MH/W
Size: ?? Likely would fit in 4U of rackmount space ?? Maybe BFL could release a rackmount chassis one day.
Pros - Lowest $ per GH.
Cons - Not released yet, specs unproven, potential delays50 BFL Singles
Price: $30,000 (50x singles @ $600 ea possibly less w/ bulk pricing)
Hashrate: 41.5 GH/s (50x 830 MH/s)
Power: 4500W (50x 90W likely less w/ high efficiency power supplies)
Capital Efficiency: $720 per GH/s
Power Efficiency: 9.2 MH/W
Size: ?? Physically could likely fit in 3U of space but removing 4500W will require more space, airflow, fans, etc. A guess to put it into rack units 6U?
Pros: Specs proven in the wild.
Cons: Worst MH/W
Notes: Doesn't make much sense to get 50 of these instead of a RigBox but if
delivery is in 4 weeks one could start hashing sooner on 50 BTC blocks than waiting 3+ more months for RigBox or IMU. 144 ztek boards
(Why 144? Just a guess on max one could put in an industrial 2U chassis w/ separate chassis for host)
Price: $36,720 (144 single FPGA boards @ $255 ea possibly less with a custom licensed run)
Hashrate: 30.67 GH/s (144x 213 MH/s)
Power: 1400W (144x 9.8W likely less w/ high efficiency power supplies)
Capital Efficiency: $1190 per GH/s
Power Efficiency: 22 MH/W
Size: 2U or 3U?
Pros: Specs proven in the wild. Similar MH/W than rig box. Could start mining in 2-4 weeks.
Cons: Worst $ per GH OTHER THAN IMU.100 Hypothetical "next gen" 28nm ztex board
(doesn't exist yet don't bug ztex, just a back of napkin guestimate based on conservative 28nm FPGA performance)
Price: $30,000 (100x 28nm FPGA boards @ $300 ea possibly less with a custom licensed run)
Hashrate: 40 GH/s (100x 400 MH/s)
Power: 1100W (100x 11W likely less w/ high efficiency power supplies)
Capital Efficiency: $750 per GH/s
Power Efficiency: 36 MH/W
Size: 2U or 3U?
Pros: Competitive w/ all offerings.
Cons: Doesn't exist.
Availability will depend on economical availability of 28nm parts which is likely 2013+
Assumptions: 33% per FPGA price increase due to demand. 80% increase in MH/s and 40% decrease in MH/W due to die shrink.
So lets normalize all these for a hypothetical 1 GH/s fractional rig (@ $0.10 per kWh)
Board Upfront Annual 1yr 2yr 3yr 4yr
C200 IMU $1,500 $4 $1,504 $1,509 $1,513 $1,518
BFL RigBox $600 $35 $635 $670 $705 $740
BFL Single $720 $89 $809 $899 $988 $1,078
Ztex cluster $1,190 $40 $1,230 $1,270 $1,309 $1,349
28nm cluster $750 $24 $774 $799 $823 $847
The year costs are the purchase cost plus total electrical cost. (i.e. to run 1GH/s of BFL singles for 4 years will cost $1078 total).
On edit: fixed decimal place error (which massively changes results) and the update is even worse for LargeCoin's relative value. It doesn't even offer a lower total cost of ownership compared to the power hungry BFL Single.
Price needs to be cut by 50% for it even to make economical sense under any conditions. Sure 1U of space is nice, and sure 100W power draw is incredible but it doesn't matter if the upfront price is so far out of line as to be noncompetitive. To be viable it likely doesn't need to be the lowest cost offering but it has to at least get in the ballpark.