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Author Topic: Antminer S5 hashrate keeps droping a large amount  (Read 985 times)
nern9
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June 29, 2016, 06:53:34 AM
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Hello! i have had my antminer s5 for about a month now, and i got it used on ebay. Every few hours or so, the hashrate drops to around 500-600 GH. I have tried underclocking the unit, then setting it back to the default, and even using two bigger power supplies, but that did not fix the problem. This is the first time i have had any problems with an antminer. If there is any ideas or suggestions that anyone has, a reply would be greatly appreciated. Thanks! P.S. I mine at slush's pool and i also have an s3 mining on the same worker as well. I will post a screenshot of the graph down below.

http://i.imgur.com/zZSuVqz.png

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RichBC
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June 30, 2016, 07:23:05 AM
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Sounds like one of the Hash Boards is dropping out. You can confirm by checking the Red LED on the top edge of each hash board.

Try unplugging and re plugging the 18 Pin data cables, could also try them in the alternate connectors on the IO Board.


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June 30, 2016, 10:00:07 PM
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I also think that one of the boards shuts down.
How are you fixing this problem right now? Do you restart your S5 or do you wait it out?

BitMaxz
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June 30, 2016, 10:14:02 PM
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Maybe you have unstable internet thats why you are experiencing droping hashrate..
Did you buy s5 second hand or its a brand new.. if not maybe there is a hardware fault thats why the hashrate drops in few hours...
Also maybe your s5 is so hot better to start mining in cold places this is just like cpu if one of the cpu is so hot one of the cpu will turn off automatically to prevent burn cpu..

notlist3d
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July 01, 2016, 01:37:42 PM
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I also think that one of the boards shuts down.
How are you fixing this problem right now? Do you restart your S5 or do you wait it out?

I'm wondering the same thing.   OP can you post a screenshot of status page when it's dropping the hash?  Does it go down to around 600ish?  Also what PSU are you using?

Assuming PSU is enough and it is 1 board dropping out here is a support page - https://bitmain.zendesk.com/hc/en-us/articles/203559969-My-S5-hashes-at-about-600GH-S .

Also did it do this when you got it a month ago?  Or something new?
nern9
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July 07, 2016, 02:55:39 AM
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Sounds like one of the Hash Boards is dropping out. You can confirm by checking the Red LED on the top edge of each hash board.

Try unplugging and re plugging the 18 Pin data cables, could also try them in the alternate connectors on the IO Board.


Rich

I also think that one of the boards shuts down.
How are you fixing this problem right now? Do you restart your S5 or do you wait it out?

I'm wondering the same thing.   OP can you post a screenshot of status page when it's dropping the hash?  Does it go down to around 600ish?  Also what PSU are you using?

Assuming PSU is enough and it is 1 board dropping out here is a support page - https://bitmain.zendesk.com/hc/en-us/articles/203559969-My-S5-hashes-at-about-600GH-S .

Also did it do this when you got it a month ago?  Or something new?

It does drop to around 600 GH/s, and this is a new behavior from the miner. I will have to try the solution that you posted. Both hashing boards remain online, but the hashrate drops still. I have a Seasonic X-series 650 watt power supply, so it should be enough. I also know that my internet is stable, because i have several other devices and other miners that are running just fine as well. http://beta.speedtest.net/result/5458186489.png And heres the status page when the miner drops hashrate http://i.imgur.com/tZJvnZI.png
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