Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 253. (Read 528055 times)

Damn man, ouch. Glad it didn't catch anything on fire.

What firmware were you using, the stock or the new one?


Ufo

Don't forget.  You know we have 200 amps on each pole but how many volts is on each pole?  The answer:  120 Volts

If you have 200 amps at 120 volts on each side, that is 200 x 120 = 24,000 watts on each side.  However, we also have at least 3 major appliances taking up a large portion of the amps available and those 3 major appliances use both poles.  The appliances I'm referring to is the A/C, Dryer and stove top/oven.  Don't forget Dish Washer, refrigerator, etc...  If you have a toaster, it can use 800 watts easily while it is toasting.  That is something to consider if you are already close to maxing out your main panel.

That looks nasty, looks more like a catastrophic meltdown or short...
The fan looks like it was melted due to a fire....

you are using the BITMAIN 1600W psu? looks like the connectorsd are all 18awg, is it possible a loose connection or poor contact with the socket caused the issue? it seems to be right at the connector

There is a sticker over a screw which is intended to be tamper evident. It looks like it could be removed without showing but I invested over 50 BTC into these and I don't want to do anything to compromise that.

So you just pop the back fan off and slide the boards out of the back?

Honestly mate, that is all I have been wanting. The damage is 100% due to faulty equipment. I purposely bought all Bitmain PSU's. I just want to sent them back so they can check it out. It just seems way too coincidental that my shipping was delayed for 3 weeks and then this happens. Is it just me having this problem or was batch 1 a disaster?

Will you take the time to show me what you did to balance?  Maybe I'm about to learn something.  Don't forget, you have 2 pole breakers for A/C, Dryer and stove top/oven.  Also circuits for fridge, lighting, etc...  Unless you did not use 2 pole for those appliances and used 2 single pole instead.  You can draw it on a piece of paper; take a photo of the paper and post the image here.  Maybe we all will learn something.
[/quote]
I did a 125amp 240v subpanel so I just needed one big two pole breaker in the main. Subpanel has six two pole 30 amp 240v circuits. Was pulling max 24 amps on each circuit (eight s5's)

Thanks for sharing that is very very scary to see.  Only thing funny is photobucket offering prints of photos.... i doubt that is a memory you care to mount on the wall.

Most likely I bet Bitmain say's no and asks to ship it back looking at the damage.   If they do surprise me and let you open it up please share.

Thanks. I have asked for permission from Bitmain to allow me to remove and inspect all hashing boards before proceeding any further.

That's what I've been trying to convey Wolfen, however technically its not combining the Amps.  Each leg has a capacity of 200A.
The Main will switch off if either LEG exceeds 200Amps is true - however if you load 160A on each leg you are not Exceeding the 200A per leg.

I'm using single pole breakers for the rigs - mostly consisting of 20A and 15A circuits - a couple of 30A circuits run to out buildings.  2 Pole breakers would be 240V no?
My service is rated 200 Amps according to electric provider.  The main appears to only be 180A on the panel, which seems right because if I load over 170A on one leg the panel gets very warm and will switch off after 30 minutes or so.
Load balancing the 2 legs/poles and I have zero issues running the 230+ Amps of rigs and other electronics.  It took a lot of trial and error as well as hand-charts to balance the load, but before I had s7's I had 25 s5's and 4 S4's along with the scrypt miners running all summer without issue.  Yes the main panel got warm in the summer and I put a fan on it to help cool it down, but circuits held and nothing burned up.
[/quote]

Will you take the time to show me what you did to balance?  Maybe I'm about to learn something.  Don't forget, you have 2 pole breakers for A/C, Dryer and stove top/oven.  Also circuits for fridge, lighting, etc...  Unless you did not use 2 pole for those appliances and used 2 single pole instead.  You can draw it on a piece of paper; take a photo of the paper and post the image here.  Maybe we all will learn something.

Wow that looks really bad.  Could've burned down the house.  Sorry to hear about all your troubles and I hope that Bitman comes through for you.  I wonder if it would be better to run these things on the side so that gravity doesn't pull down as much on the heat sinks.

That's what I've been trying to convey Wolfen, however technically its not combining the Amps.  Each leg has a capacity of 200A.
The Main will switch off if either LEG exceeds 200Amps is true - however if you load 160A on each leg you are not Exceeding the 200A per leg.

I'm using single pole breakers for the rigs - mostly consisting of 20A and 15A circuits - a couple of 30A circuits run to out buildings.  2 Pole breakers would be 240V no?
My service is rated 200 Amps according to electric provider.  The main appears to only be 180A on the panel, which seems right because if I load over 170A on one leg the panel gets very warm and will switch off after 30 minutes or so.
Load balancing the 2 legs/poles and I have zero issues running the 230+ Amps of rigs and other electronics.  It took a lot of trial and error as well as hand-charts to balance the load, but before I had s7's I had 25 s5's and 4 S4's along with the scrypt miners running all summer without issue.  Yes the main panel got warm in the summer and I put a fan on it to help cool it down, but circuits held and nothing burned up.
[/quote]
Yes you are correct. Run all single pole breakers on one leg and it is done. Hot through load to ground.
I was confused, I run all two pole 240v circuits so it automatically balances.

I think the important thing is this:

One (1) 20 amp 2 pole breaker has the same watts (power) as Two (2) 20 amp single pole breakers in watts (power).

One (1) 20 amp 2 pole breaker can pull a maximum of 20 amps ON BOTH SIDES.  This is like having two (2) 20 amp single pole breakers [One on each pole] pulling 20 amps on each pole.

A Main breaker is designed to trip if there is ever more than 200 AMPS / 24,000 WATTS draw ON EITHER SIDE.  When I said on both sides combined earlier, I meant to convey if we have more than 200 amps draw on either side, the 200 amp main breaker "should" trip.  Otherwise, THAT pole could get too hot and risk possible melt down of the pole and the breakers connected to it.

The drawing I'm including below was done in Microsoft Office Visio.  It depicts the guts of a 200 amp main breaker panel without including the neutral/ground bar(s). 

Notice how I have 5 x 20 AMP/120 VOLT (12,000 watts) single pole breakers on PHASE - A and 5 x 20 AMP/120 VOLT (12,000 watts) single pole breakers on PHASE - B.  This comes to a total of 24,000 watts for rigs.  Which, is no where near the 32,000 watts mentioned earlier.

Something else:  I'm not saying to max out each circuit.  Simply add another circuit to make up for the same total of 12,000 watts on each phase while collocated with the 75% limit for circuits inside walls and/or conduit.

Also, I have only shown double pole circuits for the large consumption appliances for the home, such as, Air Conditioning, dryer and stove top/oven.  I have not included a refrigerator, separate freezer [if you have one like myself], multiple televisions, lights, stereos, gaming stations, computers, exhaust and intake fans for getting out the heat from rigs, etc.  We have very easily maxed out this 200 amp breaker panel with what I have shown in the drawing without coming anywhere near the 32,000 watts of rigs mentioned earlier.  Plus, we don't have the other things necessary in the house like I mentioned.

A 200 amp main breaker is rated at what it says, "200 amps."  Meaning, if we ever have more than 200 amps on either phase, the main breaker will trip... period!!!  I was trying to think of a way multiple single pole 15 or 20 amp breakers could be installed to achieve 32,000 watts WHILE STILL PROVIDING SUFFICIENT POWER to all of the other circuits mentioned, such as a compressor and 1000 watt gaming machines, etc...  I just couldn't see a way to do it.

If I'm wrong, if someone would not mind taking the time to explain it to me, I would appreciate it.  Here is the drawing:

 

Ouch... that looks nasty. I hope you get your warranty sorted out. Make sure to document everything, which you seem to be doing already.

And despite what Bitmain tries to tell you I would inspect all remaining heatsinks before powering them up... something seriously wrong there. Ran out of glue or used wrong glue or something.

I am having nothing but trouble with my new S7's.

Within a day of powering them up some heat sinks came off 2 of the boards from 1 miner, resulting in 2 out of 3 boards dying.

Today the same thing happened again which also resulted in 2 boards dying. I can only see 1 loose heat sink on 1 board in the 2nd miner but I am thinking that either I can't see other loose heat sink or the sudden drop of one board caused a spike to the 2nd board which caused it to die....

Bitmain asked me to connect each hashing board one by one to see if it works. Soon after I did this 2 more heat sinks fell off right near the out fan on miner 2 which caused melting of power connectors and fan! I am trying to get my warranty which I am damn well entitled too and by doing as Bitmain asks it is causing further damage!

http://i1006.photobucket.com/albums/af186/coinbeast1/miner%202%20after%20connecting%20one%20by%20one%20picture%202_zpswhce0pr9.jpg

http://i1006.photobucket.com/albums/af186/coinbeast1/miner%202%20after%20connecting%20one%20by%20one_zpsdriandhx.jpg

I can agree with the 200 amps on each pole for a total of 400 amps combined.  However, the main breaker is designed to trip IF EITHER POLE exceeds 200 Amps; not both.
[/quote]

That's what I've been trying to convey Wolfen, however technically its not combining the Amps.  Each leg has a capacity of 200A.
The Main will switch off if either LEG exceeds 200Amps is true - however if you load 160A on each leg you are not Exceeding the 200A per leg.

I'm using single pole breakers for the rigs - mostly consisting of 20A and 15A circuits - a couple of 30A circuits run to out buildings.  2 Pole breakers would be 240V no?
My service is rated 200 Amps according to electric provider.  The main appears to only be 180A on the panel, which seems right because if I load over 170A on one leg the panel gets very warm and will switch off after 30 minutes or so.
Load balancing the 2 legs/poles and I have zero issues running the 230+ Amps of rigs and other electronics.  It took a lot of trial and error as well as hand-charts to balance the load, but before I had s7's I had 25 s5's and 4 S4's along with the scrypt miners running all summer without issue.  Yes the main panel got warm in the summer and I put a fan on it to help cool it down, but circuits held and nothing burned up.

Here is some information that I have gathered:

Fan Speed             My Findings
                             S5          S7
65% = 4200   
40% = 3600         3000      3120
35% = 3200         2760      2760
30% = 2800                      2520
25% = 2500
20% = 2000

what surprise? i don't see ANY fan speed difference whether you put nothing, 90, 80 or 70 in that % field.
The difference comes below 65%. i might update the firmware, but someone here bricked the miner by doing so. Why risk it if all it does is make the fans turn and putting 80% in % window does exactly the same thing.

Thanks for this info.  Very informative for me.  I'm learning more and more about electrical here.