Antminer S7

[m4rv3]

I recently purchased an Antminer S7 and S3 from eBay for about 450USD.

After plugging everything in, entering my pool configurations etc. I am getting a average hash rate of 1.3TH/s. Why is that? Everything seems to be working fine, in the back end, there are no damage boards etc... the average temperature is below 40

Another thing that happens is that the S7 keeps beeping, then shutting down after a while. Can someone explain this to me? 

[Veritas Platform]

if the S7 keeps beeping is not like "Everything seems to be working fine" , your hash rate of 1.3TH/s is from all 2 antminer?

[gt_addict]

We need more details to be able to help. For starters just plug the S7 in and deal with that one and its problems first.

You should have a green and red LED on the front if the red one is flashing its got a problem (if the beeping didn't already tell you that). You can try and power one hashboard at a time. so unplug two of them and then power on the miner. let it run and see what happens.

If no problems then switch off the miner unplug that board and plug in the next and see what happens. DO this for all three boards and hopefully it will identify a problem with the boards. If it does it for all three boards then it could be fans or controller board or Ethernet cable/connection.

[m4rv3]

if the S7 keeps beeping is not like "Everything seems to be working fine" , your hash rate of 1.3TH/s is from all 2 antminer?

No the 1.3TH/s is from the S7 alone

[marcos5872]

if the S7 keeps beeping is not like "Everything seems to be working fine" , your hash rate of 1.3TH/s is from all 2 antminer?

No the 1.3TH/s is from the S7 alone

Watch this

https://enforum.bitmain.com/bbs/topics/3516

[smho_16]

Another thing that happens is that the S7 keeps beeping, then shutting down after a while. Can someone explain this to me? 

Usually when a device keeps beeping and then shuts down this means the PSU or the PSU fans are not working correctly and are faulty. I think you should check more carefully on these. I am talking from experience as I work as an IT part time and I see this problem happens a lot with UPS-s, big ones which has 8 batteries and 2 fans for the PSU.

[m4rv3]

We need more details to be able to help. For starters just plug the S7 in and deal with that one and its problems first.

You should have a green and red LED on the front if the red one is flashing its got a problem (if the beeping didn't already tell you that). You can try and power one hashboard at a time. so unplug two of them and then power on the miner. let it run and see what happens.

If no problems then switch off the miner unplug that board and plug in the next and see what happens. DO this for all three boards and hopefully it will identify a problem with the boards. If it does it for all three boards then it could be fans or controller board or Ethernet cable/connection.

Here are some screenshots the S7 BackEnd

http://imgur.com/a/xs47E

Please let me know if you see any thing out of the ordinary

[VRobb]

I see something out of the ordinary...  As you stated you're only putting up ~1.3THs although the GUI is showing all three ASIC chains running, and running hot at 850MHZ clock!  That is weird. 

Only other thing I see is Fan3 (actually the second fan) running quite slowly compared to Fan1.  My fans would both tend to run at about the same speed, whatever the temp/setting was at the time.  Might want to check into that.  Beeping can come from the controller not seeing the fans properly.

[gt_addict]

Turn the clock down and the fans up would be a start I reckon.

[m4rv3]

Turn the clock down and the fans up would be a start I reckon.

After changing the clock from 850 to 70. And the fan % to 100%,  I get these results immediately

http://imgur.com/aEHdE7t


Then shortly after,  I get this


http://imgur.com/kO1CnEw


In the ASIC status,  should there only be 5 o's in the second column?  (ooooo)

[leowonderful]

Turn the clock down and the fans up would be a start I reckon.

After changing the clock from 850 to 70. And the fan % to 100%,  I get these results immediately

http://imgur.com/aEHdE7t


Then shortly after,  I get this


http://imgur.com/kO1CnEw


In the ASIC status,  should there only be 5 o's in the second column?  (ooooo)

Yeah, pretty sure bitmain designed them like that. Maybe a space issue, but if anything like that is consistent throughout the entire miner there is usually nothing wrong with it. As long as it hits the rated hashrate it's supposed to operate at, no worries.


The board might have some electrical issues, not sure what they might be. Maybe a manufacturing problem?

[andrewnasr]

when i get my new antminer s7 after one day start peping and the boards shutdown i after looking for the problem i found that the antminer has no internet

[Rabinovitch]

After changing the clock from 850 to 70. And the fan % to 100%,  I get these results immediately

http://imgur.com/aEHdE7t

Then shortly after,  I get this

http://imgur.com/kO1CnEw

The same behaviour I have described here: https://bitcointalk.org/index.php?topic=1165628.msg17518037#msg17518037

It looks like your secon fan's speed is significantly lower. Check if both fans are starting to spin at S7's startup. I guess there will be only one fan spinning, and second will start to spin only because of the airflow of another fan. Btw, check Issue #9 here.

So it looks that your I/O board is broken (the PCB to which the fans are connected). You can try to flash your S7 with 1fan firmware (try to flash it to SD card and boot your S7 with this SD card - if something goes wrong you will be able to just exctract an SD card (when the power is turned off!!!)). In case it will work properly for a while, you can power your second fan directly from PSU.

[fanatic26]

your back fan is dead, the RPM its reporting is from the other fan spinning it. Just replace the fan and you will be good to go.

[m4rv3]

After changing the clock from 850 to 70. And the fan % to 100%,  I get these results immediately

http://imgur.com/aEHdE7t

Then shortly after,  I get this

http://imgur.com/kO1CnEw

The same behaviour I have described here: https://bitcointalk.org/index.php?topic=1165628.msg17518037#msg17518037

It looks like your secon fan's speed is significantly lower. Check if both fans are starting to spin at S7's startup. I guess there will be only one fan spinning, and second will start to spin only because of the airflow of another fan. Btw, check Issue #9 here.

So it looks that your I/O board is broken (the PCB to which the fans are connected). You can try to flash your S7 with 1fan firmware (try to flash it to SD card and boot your S7 with this SD card - if something goes wrong you will be able to just exctract an SD card (when the power is turned off!!!)). In case it will work properly for a while, you can power your second fan directly from PSU.

Pretty interesting theory, I will try this and post up the results.

[m4rv3]

Finally got this problem fixed today.  The problem was with my secondary fan.  The blue wire to the fan was damaged.  After fixing it,  the miner works perfect..  Hashing at 4.6Th/s


Hope this helps anyone with similar problems.

Looks back at the pictures from above,  it's quite obvious that my secondary fan wasn't working at its optimum speed.

Thanks for the help everyone

[Instamined]

Did you put enough ants into the fuel chamber? Try putting more ants into the fuel chamber.

[smutboy420]

Did you put enough ants into the fuel chamber? Try putting more ants into the fuel chamber.

 


 

lol I have noticed for some reason ants seem to really like my miners in my garage. Tho they dont seem to be helping my hashrate very much.

[Sylw83]

I am looking for a cheap computer for altcoins - cost around £1000 pound can be from shop, ebuy, priv
anyone can help ? 

[NotFuzzyWarm]

I am looking for a cheap computer for altcoins - cost around £1000 pound can be from shop, ebuy, priv
anyone can help ?  

And you asked this in a s7 thread which mines only BTC, why?
Try the altcoin section https://bitcointalk.org/index.php?board=160.0