Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 196. (Read 527809 times)

 as well as the stillborn triplets
https://bitcointalksearch.org/topic/m.12963707

Twins connected  with twin PSU


Click to enlarge

Wow it looks like the whole chip came off with the heat sink.  Is that what happened?  If that's the case, then at least they used some strong thermal glue there!  Sorry to hear about the bad luck though.

You make one mistake. My electricity cost covers the sale of BTC. I only sell it when the price is high. Thus, it is like a loan which I will pay always return, selling BTC.
I can not use it for the purchase of BTC. if the price is low , because I have to pay for electricity..

Over the last three months I have sold used miners more than 100 BTC
The WIN should be only after the sale of the all S7 miners.

It depends on the market,  how great it is to be.

you can do that too (S7 Twins)
https://bitcointalksearch.org/topic/m.12982754

you can do that
https://bitcointalksearch.org/topic/m.12982754

Was the Oct Firmware released to resolve the issue when there was a loss of the internet; the unit would not overheat/brick?

Try this too:  [email protected]   

If u gonna mine more BTC then you had to paid for 31xs7 then its ok.
And instead of paying for electricity when price is low you could just buy more BTC
Do your own math:
1. BTC you had  to paid (If you paid USD then BTC you could buy instead of miner) for that 31 S7 with shiping&tax. There is no need to count psu etc. + How much BTC you could buy instead of paying for electricity x any BTC price you want. Versus
2. How much BTC you will mine x same price as in 1.

If 2 = more euro then you did right choice (for making more money)
i know many ppl dont care and have enough money and just want to mine becouse its addictive (i was miner too)

But at the end just for money making calculations:  if your mined BTC - electricity + BTC for your miner after you sold it = more BTC than you paid for the miner = WIN. If its less then it was better to just buy BTC and hold.

Its diferent if ppl using miners for heating like few posts above. Its almost always WIN ;p

You can not send back the entire miner. Bitmain warranty does not work that way.

2. All sales are final. No refunds will be given. Defective machines can be repaired for free under the Bitmain warranty policy. After the warranty period, machines can be repaired for the cost of parts and labor
4. Customer must return the defective parts at own expense after opening a support ticket and troubleshooting with Bitmain's instructions.

https://www.bitmaintech.com/productDetail.htm?pid=000201511170341298180m44675v0613

I was lucky with my 3x S7 repaired blades but unlucky with 2 xS5+ blades which is last sent back from china.

After a few hours


Click to enlarge

S7 software is installed on the controller board. I have been unlucky with this miner, installed the controller and new boards within a minute or two saw a spark coming out of one of the board. Now the controller turns on with other 2 boards only, adding the third one turns off the controller. It shows pool is alive but 0 GH/s hash rate. I am going to request if I can RMA the entire miner and get a different one.

I think so. Mine is S5+_CtrlBoard_V1.1

I see it differently.
I have at the moment 31 x S7 + some water cooled S5 for  heating .  150TH/s  mining at this month daily 1.10 BTC  (Antpool PPS )

I have 3x 50A  220V   It is always full. Some of the miners have been at a friend's house - today 4 x S7 Max 12 euro day , in a month less as 400 euro.
My home electricity consumption is not more than 3500 euro in a month.
So total 4000 euro or less for electricity.

If the BTC  price is 300 euro , then if I can sell all mined BTC and  I got 9900 euro or more per month.

In this case, I have recouped the purchase of three S7  miners per month-  2000 euro (or less) per miner with shipping and 20% VAT

But I sold last my BTC, when 1BTC=350 .

With mining you can earn more than with the purchase of BTC and holding them.

But you must sell when the price is high .. And you must have a reserve to pay for the electricity when the BTC  price is low for several months.

That is a very great point in re: to your model.  ROI for mining has gotten very long, however you did not include re-sale price into your equation. SO, let's run the same comparison for an S5 purchased last December, and put online on January 1st until today, for the cost of $500USD.  This isn't speculation, but fact:

1) Spend $500USD (around BTC1.5 at $330 exchange) For an S5. Difficulty was 40,600,000,000 and average difficulty increase was 2.2% over the 24 periods. Assuming electicity cost of $0.07/kWh (I'm using an average exchange rate of $260 over that course of time for the sake of electricity costs)
Total Net Income - BTC2.3
Current re-sale value of S5 (conservatively) $320 or BTC1
Total Net Return on your BTC1.5 investment  in Bitcoin - BTC1.8 or 120%
Total Net Return on your $500 investment in $USD - $575 or 115%

2) Spend $500USD on BTC, and get BTC1.5 at $330 exchange
EVEN if you were to have cashed in at the highest exchange during that 11 month period of $502, you would have
Net Return on your BTC1.5 investment in Bitcoin - 0% (since your Bitcoin didn't change in value)
Net return on your $500 investment in $USD - 51.5%


Now, let me do my speculation on the S7 purchase using your figures, but including a realistic re-sale value of the S7:

1. I'm buying s7 for 5BTC = 5BTC or 1500 usd spent
2. I'm buying 5BTC

few months later i got like 3BTC back from s7 and 1BTC=1000USD
1. i have 3BTC or 3000USD - electricity of mining revenue = wow profit 200% in USD hohoho great Edit: Antminer S7 has depreciated by 20%, and is now worth BTC4 (since the price of used miners is DIRECTLY tied to BTC and NOT $USD, as has been obvious with the used price of S5's during the recent rally), for a total of BTC7 or 7000USD, a profit of 466%
2. i have 5BTC or 5000USD = 2000USD more than example 1.. profit more than 300%

If 1BTC gonna cost 200USD then:
1. i have 3BTC = 600USD -- you lost 2BTC and 900USD, Edit: and the Antminer S7, which say is still worth BTC2, using a 60% depreciation, therefore you still have 5BTC and the same USD as example below
2. u have 5BTC = 1000 USD - you lost 500USD so u have 400USD more anyway

Why do people always ignore the fact that you sell your miners for money after too ?  + free heat for winter ?  Its all profit from my point of view

I have Model : S5 Version IO.V1.6

but your controller matches as well.  Attach PCI-E and network cable  and see what  software is there inside.

For some of us going into winter the heat generated is a plus. I can look at it as free heat from mining or free bitcoins from the heater. Also if you don't have a miner in the basement you never get to experience the noise of having a jet engine down there! 😜

got my batch 5 today, all setup & running well... just wanna share & i think most would've noticed the slots on the sides of the miners.

slotted 2 x batch 5 with my batch 3, just like a lego block. makes it more sturdy. like the housing.

all of them hash as advertised, stock. all pcie's connected from 4000W psu. not gonna touch anything till the 90 days warranty passes.

temps are at mid 50's. very low HW error. 0.0001%

the hashrate does jump around quite a bit but avg's out to the advertised hashrate.

1 of the batch 5 has a woong woong woong fan sound if fan is above 60% .. tried to loosen & tighten front n back fans, no fix.

another batch 5 controller has no green LED light but it works fine so i'm not gonna make a fuss or touch anything. the LED next to the red LED near to LAN port.

other than that, pretty happy. no warm cables (16 AWG custom made) or so.

can't wait to see more ideas when the 90days warranty passes. i'm sure lots of guys here are trying something & doing innovative stuff yeah ?

FW is stock sep 15. i think i saw some guys updated the OCT FW. any difference ?

waiting on the data cable to save a controller board. hooking up 2 in 1 when cables arrive.

regarding ROI .. yes it's tough & NOT impossible at this stage but later, yes but depending on individuals .... i;m gonna mine the the chips, board, etc melts away so i think i'm gonna hit ROI & prolly a lil' profit.

buy BTC or miner almost the same imo, we all want BTC go up !

Exactly.
In other words, buying BTC = speculating in BTC/USD price, buying miners (by paying in BTC) = speculating in mining difficulty.

The ROI as been talked about over and over, it all comes down to one thing, it's a gamble, if you can`t afford to lose some money, don`t gamble
on the other hand it`s a nice hobby that has "SOME" return to it.

If u buy miner instead of BTC then your speculation is riskier AND profit is LOWER Thats why there is no point in buying miner that will not mine more BTC then it costs
Example:
1BTC=300USD
1.im buying s7 for 5BTC = 5BTC or 1500 usd spend
2. im buying 5BTC

few months later i got like 3BTC back from s7 and 1BTC=1000USD
1. i have 3BTC or 3000USD - electricity = wow profit 200% in USD hohoho great BUT:
2. i have 5BTC or 5000USD = 2000USD more than example 1.. profit more than 300%

If 1BTC gonna cost 200USD then:
1. i have 3BTC = 600USD -- you lost 2BTC and 900USD
2. u have 5BTC = 1000 USD - you lost 500USD so u have 400USD more anyway

Its Always WIN for buying BTC unless ofc u think your miner gonna mine more BTC then it costs.
There is one exception becouse you can sell your miner but if ppl would think then noone would want to buy it from you. And ofc your miner can burn or something. So more RISK and LESS profit.

P.S
And i want to add one more thing that if we all just buy BTC then we will help BTC price will go highter. If we are buying gear then yes we are buying BTC but then producent will sell this BTC soon for USD so we r not really helping BTC price to rise