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Title: Antminer S7 slow Hashrate Post by: SkaWeasel on March 06, 2017, 09:02:04 PM Hi guys,
I don't know what happened to my Antminer S7 but it was mining at 4.7TH/s but suddenly the hashrate changed to 3.7TH/s I've also notice in my configuration on the miner status, I got oooo oooo oooo oooo oooo oooo ooo ooo ooo ooooo oooo oooo oooo oooo oooo Something like that, do somebody had this issue ? Just looking some orientation Regards Title: Re: Antminer S7 slow Hashrate Post by: darthmaul on March 07, 2017, 05:04:22 PM Before getting to much into software stuff, have you looked around your S7? Antminer S7 is really fast and consumes big amount of data and electricity. Moreover as you might know (must know) they produce huge amount of heat which directly slows down the rate of hashing. If you have not maintained the environment around Antminer to cooler one then that would be first choice of reason for your hashrate. I recommend you to create atmosphere of 10oC to 15 oC this will help your miner circuit to work more faster and precisely. These things really matters while you are using your powerful hardware. Not much related but let me share you one interesting stuff. If you use smartphone which is well operating and having good performance then try this. Take it into very hot zone two-three times for about week. Later, after one week your phone will start to dead in between whenever you use it. This happens because your phone's circuit capacity decreases in hot atmosphere (The Conductivity more specifically) leading to abnormal behavior. In similar way your Antminer S7 (well oviously 1000 times smarter than smartphone) which conducts huge calculations over nano period of time gets heated up very fast and circuit conductivity is ultimately alters leading to slowed performance.
These are just my predictions and suggestions. But this might be the case :-) Title: Re: Antminer S7 slow Hashrate Post by: SkaWeasel on March 07, 2017, 09:34:49 PM Thanks for your answer, unfortunately I do have a cold environment in my site, so I don't think that's the issue. I investigate on Bitmain web site and founded this, http://support.bitmain.com/hc/en-us/articles/220872007-Possible-problems-for-Antminer-Troubleshooting-for-S7-S9
mine its issue number 6 .... so apparently I need to remove the card and repair it... :( Title: Re: Antminer S7 slow Hashrate Post by: fanatic26 on March 09, 2017, 03:52:07 AM Not sure what the other guy is talking about because these miners actually only lose speed when they get too cold not too hot. The miner will run full speed up until the 80c cutoff built into the firmware. It looks like you have a board with bad chips. Can you post a screenshot of the actual miner status page? It will help quite a bit for troubleshooting over the forum.
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