Topic: [Guide] Dogie's Comprehensive Bitmain Antminer S7 Setup [HD] - page 7. (Read 76346 times)

Love the design

I may do something very similar with my s7. Where it is going I can get free power and internet, but need to dampen the noise big time.

Question

At the back of the box where you have the white intake vent. Do you think I should add a additional powered fan to help bring cool air in?

Thanks

You might be able to get a deal on outdoors extension cords.  I have a very heavy duty one that was meant for a lot of Christmas lights.  I used it when I wanted to have a circuit in one room go to another to mine.  I'm guessing most stores discount lighting and lighting accessories for Christmas lights now.

But make sure it is a very good outdoors one.  Some are not near the quality and cheap. 

Great setup info. Can't wait to get my s7

And to handle the "wiring", i use big outdoor yellow extension cords. I bring those the a corner in the living room and have all the miner dumb their heat strait outside. I have actual 120V so i do okay up to 1400~1440 per circuit i guess. That should be enough for some OC room for the S7 after the warranty expires.

if not wiring for 240v, you'll have to map your circuits. I happened to have two circuits nearby, so i just use a good extender/surge protector to bring power from the second circuit to the room with a first circuit. This allowed me to run two S7 in the same room. This is probably a limit/room as with more the room will overheat.

One typical residential 15A, 120V circuit can safely run only ONE S7 as 1345-1360W (at peak)/110 (at minimum)=12.3 A. You have to stay at or below 80% of 15A (~12A) for continuous use ( and NOTHING else on the circuit). The fact that on peak it will be 12.3A might be OK since it will be at maximum output and minimal voltage. Typically, voltage is higher than 110V, giving you a slight cushion, but it is close.
A 110/120V 20A circuit is definitely OK-you can check your box re which circuits you have.

Batches 1, 2, 3, 4, 5 and 6 are safer in this regard (they use less power).

Also if your within 90 day's of purchase make sure to make a ticket for help.   If within warranty chances are send it in and they send one out (assuming warranty is in-tact).

If after 90 day's I would email them and ask for cost.  The S7 is new enough getting another board I would think would make sense as long as it's not high priced.

yeah, but will have to take the bad board out and someone suggested to tape the entrance and exit to the empty space, so cooling fan air flow will go only through other two. good luck.

Hello help advice  I burned one of three circuit boards with chips ,I can run two boards with chips?

D'oh!

Wiring up 240V circuits.

I can get one, maybe two, miners, on one circuit, depending on the load.  What are other "home miners" doing to get 5 or 6 miners in the same room?  I understand "the professionals" are wired to do this, but what are "home miners" doing?

I'm in the US with 120V home wiring.

A year ago when I got my third S3 I realized that I would max out my circuit.  So I got a 12 guage extension cord for the new power supply and plugged it into an outlet in a separate room.  (I verified that it was a separate circuit by flipping breakers in the main panel.)  This looked like an acceptable temporary fix, but then I discovered that the outlet where the extension cable was plugged in was getting warm.  A little detective work showed that many other outlets in the same room on the new circuit were also getting warm.  This was a little scary. 

I hired an electrician and had new dedicated point to point circuits run from my main panel to new outlets in my mining room.  This made me sleep better.  While he was installing these new circuits I had him replace the older outlets on the other circuits that had been getting warm.  It turns out that these had been connected by pushing wire ends into the outlets to save time, rather than taking the time to strip wires and wrap the connections.  Over the years, these connections had become corroded, creating resistance and thus heat.

It is not safe to use older electrical wiring lighting purposes and the occasional intermittent load without checking it out thoroughly.  Older wiring may be perfectly legal and perfectly safe for typical use, but doing bitcoin mining is like using a bunch of hair dryers 24/7.

14 AWG extension cord would certainly be fine but 12 AWG even better.  However, 12AWG can be expensive compared to 14 AWG.  14 AWG is certainly much better than the 16 AWG on that 15 amp outlet.

Okay.  I think I will be headed out and grabbing a 12 AWG rated extension cord or better.  'pretty warm' disturbs me.  I don't intend to run the router off of it.  It's fine where it is.  I'm just not able to feed power to the S7 from the same bedroom where the router is.  The S1s weren't a problem because they were wireless.  But since the S7 is a direct-line into the router, I sort of need to keep it close to the router with a long extension cord, or a bit further away from the router with a long CAT5 ethernet cable.  I definitely don't want it in the hallway making all that noise.  LOL  At least in the office (3rd BR) I can close the door on it. 

I have an old wireless router from Verizon.  If I can figure out how to turn it into a bridge, I may be able to stick the thing into the garage.  =]

Yes, it's sufficient for your router but only one S7.  It will get pretty warm but not hot with one router and one S7 on that 16 AWG extension cord.  I'm assuming your are using a PSU(s) that can also plug into 120V?

Watch this video about breaker panels:  https://www.youtube.com/watch?v=FMbDPyYAfXw

I'm not really worried about the main breaker.  Just the small one headed into the bedroom where the router was installed -- it's rated 15A and shared for both back bedrooms (other than the master BR which has its own 20A for itself).  We're using the 3rd bedroom as an office.  I think I may be running an extension cord from the hallway.  Do you think 16 AWG rated extension cord would be sufficient for a single S7?  

Okay.  I think I understand now.  On breaker boxes, do the breakers read for 220V or 110V?  I thought residentials get 220V, and it gets split/halved at the box or something.  I should have tried learning more about this stuff a long time ago.  I am assuming that 15A breaker is for 110V?  Is that correct?  It's normal USA wiring, as I understand it.  Built new in 2006.  A quick look at the breaker box shows 10s, 15s, 20s, 30s, and even a 40A.  And it looks like the 30s and 40 take up a double-slot in the breaker box.  So those are maybe 220V?

I have an S7 coming within the next 7 hours FedEx.  So I am trying to learn what I can as quickly as possible.  I could kick the fools who wired this house -- as the two back rooms are both on the same 15A breaker -- which is where the router comes in.  And the master BR is on a 20A for itself.  SMH  

Because its rating at 12V, not 120V. I don't know what mains system you're going to use, but I know you'll be using ~12V.

``Rated Current   108A``

Why is it 108A and not 10.8A?  I don't understand that at all.  I see that bitmain also doesn't use the decimal:



And it's true about the subsidy payout halving from 25 to 12.5 BTC per block (though I am not sure of the exact date).  It does this every 4 years by design.  That will be an instant 50% reduction in mining profits from that moment forward.  I am not sure how many of the mining estimate calculator sites take this into consideration as of yet.  One thing they do NOT include, but which is becoming more and more important as time goes on, is...the fees collected from all the transactions.  Those fees don't disappear into the void.  They don't go to the person who invented the system either.  They go, instead, to the miners who solve the block (in addition to the subsidy).  They can't be calculated ahead of time, because they depend entirely on how much in fees was collected in that block.


You can infer from the slope changes in this curve that the payout halves.  As time goes on, a larger and larger portion of the overall payout to miners will be the fees collected rather than the subsidy which keeps halving every 4 years.