Try this.
https://docs.google.com/spreadsheet/ccc?key=0AmeuPljmUNHCdEpqX2RmMDFwemJyLURVUWFtZ3J3aGc&usp=sharing
J/GH
https://docs.google.com/spreadsheet/ccc?key=0AmeuPljmUNHCdEpqX2RmMDFwemJyLURVUWFtZ3J3aGc&usp=sharing
J/GH
THANKS! Wow!. So it looks like everything before this summer is more than 1 J/GH. Assuming all in operating cost of 0.10/KWH, that means they are already negative on power or (1J/GH) go negative in December (assumes 10% difficulty bumps). Think about it. The capital investment made in Apr-Jun quarter by the big miners is obsolete in 9 months. This is not a viable business model at $300 BTC.
IMHO, BTC prices are dropping because some large miners must sell to keep the lights on. That is a vicious circle. People who believe in BTC are going to hold while the miners dig themselves into a deeper hole. I'm increasingly convinced new capital will stop flowing into new hashing capacity and difficulty increases will slow, perhaps by a lot.
you do realize a builder such as asicminer can build a long tube doing 1.4 or 1.5 th for under 200 usd ? in China he can get low cost power at 6 cents or less.
you do realize bitmaintech stopped selling the lower priced s-3's because they can build a farm at 225 usd a th. hashnest is its name.
The reality is that many will have hardware on the shelf. Especially if they are already capped at their present location. Building infrastructure to operate miners is not cheep. It would be better to have that off the network then having it effect your present operation.
So if you take that into consideration. Buying BTC at Sub $300 is far better then any hardware investment.
