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1  Other / Beginners & Help / Learning how to safely escrow with BTC? on: June 06, 2018, 04:12:02 PM
Hello Folks, I have been looking into buying / selling with BTC but I can not seem to find a service that looks reliable or trustworthy to use as escrow when trading digital goods. I keep reading that people are doing it with BTC but so far I have only been led to places that leave me feeling uneasy.

Can anyone suggest reputable and trustworthy ways to escrow my btc?  Thanks for the input in advance!
2  Bitcoin / Mining speculation / Re: GMO miner B2: 7NM mining within reach? on: June 06, 2018, 02:05:42 PM
We can simply use calculator to compare profitability, and can see that ROI for B2 is 100 days more than with S9i :

[...]

That is, while efficiency of B2 is 15% more than of S9i,  but high price makes it 30% less attractive for ROI.

I agree on the surface that the GMO B2 does not look as appealing, but if you run the same calculations accounting for difficulty adjustment over 2 years, the B2 is the only one that can give a RoI in 1.5yrs and remain profitable after that. Assuming a $50 internet connection monthly, a 10% rise in BTC price monthly (Only way the calculator would show either profitable) with a power cost at $0.09/kwh. It is not as straight forward as 10% price increase a month though. These new GMO miners "Should" ship in October, which I interpret as it being delivered some time around December. So with 5 Months of missing s9 profit ($410?) it would not matter longer term.

It would make sense to have hardware that will remain profitable for a longer time than hardware that in the near future will not be profitable for smaller miners like myself. Assuming it does not have 4 months of delays it makes sense over other options.

-I could easily be wrong and missing something that a more experienced miner may see.
3  Bitcoin / Mining speculation / Re: GMO miner B2: 7NM mining within reach? on: June 06, 2018, 12:21:11 PM
look for an expansion board to connect on some good server PSU, with lot of 6pin connectors
You will need at least 10 6-pin connectors to connect all the boards, like on the antminer
and server PSUs are the best choice, cause they are build to run 24/7

the price is around 0,15$ per W, a 2,200 W PSU will cost around 330$

They have stated on twitter already  "$1999 PSU included" which can be seen here:  https://twitter.com/gmominer/status/1004317442267439107

Looking at the cost of operation 10% or more savings on electric is huge. Power rates do change, and that 10% could be the difference between an RoI/Profit with a longer outlook as difficulty rises. I personally do not have facilities paying $.03-$.04/kwh, in the summer time I pay a whopping $.0857/kwh. The extra efficiency looks pretty enticing to small fries like myself looking at a 2 year road map. I assume there are others out there feeling the exact same way.
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