Re: [Antminer S1 open for sale again] The last round before the Chinese New Year
Good news
To hose who say 2.2BTC is too high, you need to review your calculations - difficulty is beginning to settle a little towards 20% increase per jump which results much differently than those 96%/month estimations. I think that at 2.2BTC, you should expect it to mine 2.1-2.6BTC in its useful lifetimeI have units from the original 4.75 and 4.25 auctions/group buys, and looking at the income they have provided, they have made *approximately* 4.3 and 3.95 BTC each - a little lower than bitmain's estimate, perhaps because shipping time/delays and system setup/down time were not factored in. - In either case, both systems need to pay off far less than 2.2BTC of their costs
The product is simple and fairly energy-efficient. it would be nice to see an option added to purchase units with a secondary fan installed, or perhaps slightly quieter fans, Considering I have added a second $20 PWM fan on each unit ive bought so far
http://bitcoinwisdom.com/bitcoin/difficulty
My estimate is around 35%
Second please let some who participated in those group buys to comment reality against projection
By reality I mean separate pool/s account and the ACTUAL TRACEABLE income
Have in mind that in reality mining income is at least 5% less iff all is super fine during the period and you do not need calc for that
maybe you missed what i said - the 4.75BTC unit IS very close to paying for itself. I run at 190GH and $0.10/kWh. Its not as close as bitmian is suggesting, but i had delays in shipping, setup, and some internet outtages. In either case, I expect the miner to pay for itself sometime around, or just after, the next difficulty jump in 9 days
its a little tricky to estimate the exact income, since i now have 3 antminers and a bitfury mining together. All mining is a single wallet address, and I have used a few pools (eligius, btcguild, and ghash.io) at different times and sometimes sent payments from them to btc-e or to bitmain for purchases rather than into the mining address - so I have to round some numbers and make a few estimates on these details.
PS: I am using Cougar 120mm PWM fans (<21db, 70cfm) as my secondary fans, and i beleive they help pull a lot of the excess heat away