Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 382. (Read 528055 times)

Yes, but you know Bitmain...  They will raise the price of the S7 if the price of BTC rises to 300.

Also, if BTC price rises to $300 after I bought 70 BTC at $224, I will have made $5,320

You have a point there with the "winter" mining.  Sounds like I may be holding onto my money and using it to trade pairs conservatively on FOREX.  

I was thinking very seriously of moving to Washington State in December [if not sooner]  to start out with at least 50 S7's (243 TH/s).  I was wanting to be in place with cheap power in anticipation of a surge in bitcoin price by the Spring.  Now, I'm wondering if the difficulty would be so high to make it all for naught?

Well the thing is if you bought at btc at 230 and btc rises to 300 you would have been better off at holding original BTC then buying the miner.   The miner would cost less BTC at 300 btc value.

So again that went into my ROI notes.   My ROI notes and math was kinda a sad place.

I'm sure it is a great product on S7.  Sorry if I am a little negative after trying to do my ROI sheet, I just got a lot of unknowns when i put it on paper.

I don't think home miners will ever turn off their gear when difficulty skyrockets, they just sell it to someone with cheaper power costs. Look at how many threads there are in the "Classifieds" section with people in 3rd world countries starting up farms because they have free or cheap electricity.

I think by Febuary the difficulty will be 100G. Because in October or so, winter is coming and many will power on rigs to offset heating costs. There is also these new S7's being produced which will increase the hashrate very fast.

I don't think these S7's will ever make anyone any profit even $1, unless the BTC price goes into the $300 region OR if the equipment gets sold at a high resale value.

If these S7's were gauranteed money makers, Bitmain would just mine with them themselves and just sell us the S5+.

You have a point there with the more efficient chips from lower NM chips.  That could potentially FORCE a lot of people out of the game with a power push.  It all scares the hell out of me.  Talking to you has me thinking now that I need to hold off.  However, I'm thinking the price of bitcoin could go up soon.  This would make the price of the S7 go up soon.  So many damn variables to consider.  My brain has been burning the past 12 hours.

Also remember the ones that will be coming later choose to go a lower NM chips.  So efficiency is hard to guess on some of them.  That adds to me being scared.

Bitmain made a smart business decision with mastering this NM chip, it allowed them to be first to market on next gen.  So I give their R/D department credit for the decision and these chips. 

So there is difficulty and what the competition gets on efficiency to look at when really putting down ROI thoughts.

Yes, that is my concern as well.  I'm not sure what KnC is going to do; what Spondoolie's is going to do...  It's just too damn hard to say.  I came close to purchase of 9 S7's just a moment ago but I did not have the method of shipping chosen.  So, the order did not go through yet.  I did not know to take that as an omen or what.    So, I still have not ordered yet...

If KnC and Spondoolies add a hell of a lot of hash, we could see difficulty as high as 90+ billion by December or January.  However, if the price of bitcoin is the same by December or January, that will only hurt them and not help them.  However, you have to think if they shot the difficulty up to 90+ billion that a lot of miners with less efficient rigs in high power cost areas will have to drop off line.  Which means the difficulty would drop to less than 90 billion.  No?

Difficulty scares me as well we had MANY weeks at 2 percent or so.  Just was no new gear and was a pretty good time to be a miner.

Now this current one is where it get's scary it is high 5's.  So... will this continue we really don't know at this point.    A few more changes we will have data.  But my ROI math I had a hard time currently as I do not know what it will be close to.

And this is for every miner that will come onto market with next gen not just the S7's.

I was actually thinking about buying 9 or 10 S7's for now and another 40 in December.  However, I'm quite concerned about difficulty jumps between now and December.  Any thoughts on this subject would be appreciated...

I know as the difficulty rises there will be others to drop out of mining if bitcoin prices remain the same.  Those who drop out will mostly be home miners with substantially high power costs and less efficient HW.  How much of the network hash rate actually falls into this category?  Hard to say...

Any idea how many rigs BITMAIN will make in the first batch?  That will give me an idea (rough estimate) of how much the difficulty can possibly rise each month over the next 3 months.

If you haven't noticed, the hash rate is turning up rather sharply on bitcoinwisdom.com.  Can we expect this angle of ascent on the chart for the next several months?  If so, we are looking at 70 billion difficulty rather easily by some time in November.

How many rigs can BITMAIN manufacture in one month?  Maybe 5,000 units?  Knowing this can assist with determining what the future difficulty can be potentially.

Bitmain is in a rather sweet position by knowing how many rigs they make.  This can give them an edge in knowing what the potential difficulty can be at a particular time +/- about 5 to 7 percent accuracy.

The S7 is definitely a game changer at this point in time.  It forces one to really weigh their potential purchase a lot more.

So are these S7 currently in use somewhere or when they start arriving in people's doorsteps at the end of Sept, difficulty will start to rise then?

S-3 are the best.

Easy to make quiet. Swap the pull fan with a silverstone 141 clock to 206 hash at 420gh.

I still run four of them in two-three cent per kwatt spot.

I need to get the s-7 just as quiet!

God damn bitmaintech.  the s5 is a damn airplane engine.  i cant even imagine the s7.  MAKE A UPDATED S3 PLEASE.  that thing was smoooooooooooooooooth

in my case I just wanted to muffle the existing fans. This tube is open on both sides and it has a 3-4'' layer of 'muffling' plastic inside. the inside diameter is wider, but becomes similar to opening because of muffling plastic.
The idea was that S5 would have fit snugly into a 8 or 10'' diameter tube together with all the wiring, hence reduced noise.

So, I am curious. If you can fit a rectangular miner inside a cylindrical "Duct Muffler Silencer", is the idea to retain the existing S5/S5 setup, or to replace the fans with larger fanst at the end(s) the cylinder? My recollection is that one of the reasons for the S5 noise is that fans generate a fair amount of static pressure to actually get the air pushed through the S5 blades and heatsinks. It seems to me that the S7 will require at least as much pressure as the S5, if not more so (i.e. 3 blade -vs- 2 blades). Obviously if you replace the S5/S7 fans, you'll need to make sure the air doesn't just flow "around" the miner and does actually flow through the heatsings and boards. Obviously Bitmain could have done something to reduce the "heat density" of the S7 (e.g. 1 or 2 boards instead of 3), but haven't (yet). Could be they'll introduce the S7- "actual home miner" with a power/noise profile that's better suited to an actual residence.

Of course maybe I am just too picky. I look forward to folks actual experiences and experiments.

Yup- good example. Sooo...you don't want my LTCGear boards i guess- LOL.

...we think similarly...
last year I almost purchased the stuff below for S5, but you have to calculate exactly which diameter would accept the S7 rectangle:
http://www.ebay.com/itm/4-6-8-Inch-Duct-Muffler-Inline-Fan-Silencer-Noise-Reducer-Hydroponic-Filter-/281147636370?var=&hash=item4175b47a92
or http://www.ebay.com/itm/8-Inch-Hydroponics-Duct-Muffler-Inline-Fan-Blower-Filter-Silencer-Noise-Reducer-/261492562812?hash=item3ce22bdb7c
not sure 8 inches would be enough, but 10 probably will.
Edit: I might do it and put it outside of the house or into garage with incoming end ending at or close to the wall.

The SP10s and SP35s had smaller fans ... so more of a high pitch noise (unbearable to the ears long term) ... they run at around 70DB to 80DB. I quickly dispatched them to data centers.

S7 then ... maybe a deeper noise but probably still unbearable for the average home miner.

for quiet mining there is some hope but they all involve  case rebuilds/mods .

two blades = 800 watts and maybe a fan mod  gets you quiet.  of course you lose ⅓ the hash.

frankly I will need to find a sound solution for mine that I like.

one is long cables to the controller and open the case into 3 pieces .

others are box fans.

I have 1 more idea 2 of these

http://www.ebay.com/itm/EBM-PAPST-Motorized-Impeller-Fan-R2S133-AE17-05-230V-AC-NEW-/121745244827?hash=item1c5895029b


inside this

http://www.homedepot.com/p/SAKRETE-10-in-x-48-in-Concrete-Form-Tube-65470006/100350260

The thing is, these fans go up to 4200 rpm, my s5's go up to 3960... I guess they are little bit powerful.

Upper 70ies are annoyingly loud for some people
80dB-possible damage in 8hr exposure

https://www.chem.purdue.edu/chemsafety/Training/PPETrain/dblevels.htm

Since S5 was 70-72 dB and S7 has two of the same fans, it stands to reason that it might be 80dB.
If I cannot bring it down to 60-61 dB, i would have no use for it longer term. I can probably tolerate 64dB for up to one-two weeks.