Topic: ANTMINER S4 Discussion and Support Thread - page 7. (Read 301481 times)

well this what i'm asking...if everything ok from the numbers I shared...could I try to overclock it some more too.

So I was setting up an S4 for a buddy recently, and had an issue I've never seen before. I was hoping someone here could maybe shed some light for me.
Basically, I setup the S4 (as I have many times) and began running, at stock mhz. On boot all of the o's were actually ---- for about 2-3 mins, However it was showing a correct hashrate. Then after approx 5-20 mins (different depending on my troubleshooting) one board would slow down and eventually stop running, leaving me with half the hashrate.

During the slow down process a few of the o's would change to x's. Sometimes it would be one, sometimes up to 5.... but never the same o's. After approx 30-60 mins the x's would go away and hashing would resume as normal.... but only for 1-2 hours, then it would repeat the process.

For the first cycle of this strange occurence, It was always the 'bottom' board shown on the web interface. However subsequent cycles of the issue (after say 3 hours) the x's would be spread through both boards.... still no more then 5, and still always in different places.

My thoughts after messing with it for a few days, is that the controller board must be on its way out, and only getting intermittent connection to each board. Any thoughts?

edit
single s4 running on a corsair AX850 gold
/edit

2nd edit
My bad just realized, it had to be an s5 since it was 2 boards not 4.... but theory's should still apply the same i think
/2nd edit

Yep, a proper PSU could definately unleash them. I used DPS-2000BB PSUs with mine when I had them, ran them at about 2.5TH/s each.

Only reduce if you don't care about the PSU dying.

So basically, even if the stock PSU was resent for a good one, you say I should reduce my frequency ?

Take a look at my stats, just in case...

Shit....awesome speed.

It's a shame the stock PSU was so useless.
With a correct one, you can get quite nice results.



The only limit was the gui not allowing over 268.75 frequency.
This is with a custom breakout board able to supply 2400w on 220/240v and 1800w on 110/120v

Doesn't matter if you're on the 10th replacement (Which would be possible with S4 PSUs lol) it's still the stock PSU. It's complete garbage, and will eventually fail. I'd stick to no more than 212 if on 120v, or 218 if on 240v.

Oups, 218.75**** 425 is my S5

And like I said, no, it's not the stock PSU, it's the one they changed. I opened my S4 and noticed it was the new, but I dont find how much Watt and Frequency I can use.

I assume that's a typo and you meant 225MHz. With the stock bitmain PSU, no, you can't go further. In fact I'd suggest not going past 218MHz with stock, or even 212.

edit ; 218.75 Frequency
0725 Voltage
Not the stock powersupply, second one changed by Bitmain

Temp between 52 and 59, will be even lower in the next weeks.

---

Can I rise the frequency or voltage ? I'm not sure of doing it and prefer to ask before I make something burn.

Thank you.

Not sure if this will help anyone but I'll share just incase it can.  Recently my Antminer S4 stopped working.  I bought it in February this year and have used it lightly so i didn't understand what was wrong.  

This problem only started after I updated to the latest software on Bitmain's website:
https://www.bitmaintech.com/support.htm?pid=00720140930114518599JXGHWWD80660

Before I updated I was able to connect my Antminer S4 to any outlet with 120v and 15 amp breaker everything would work on occasion the breaker would trip.

Since the update the Antminer S4 will only work with an outlet that has a 20 amp breaker or higher; anything less will not let the hashing boards to turn on.

not sure if this is a part of the update or if my s4 is just being smart and not allowing 15 amp breaker to power it or who knows either way if ur having issues maybe try that.

I've had some trouble with the miner locking up when changing the configuration on my S4. I wanted to install this, https://github.com/haakonnessjoen/MAC-Telnet

it would enable me to connect to another device on layer 2(which is still active when the miner locks up).

I am able to SSH into the device but it doesn't even allow any of the software to be upgraded. I'm assuming this is a security feature since upgrading could cause incompatibilities.

Does anyone know the pinout on the BBB controller to check for power?

I have several units where the green lights come on, the ethernet lights work/on, but the display stays blue; fans stay at 100%; & the blue lights on the BBB controller never come on.  I am assuming dead controller.  I swapped many working SD cards but no luck.  Thanks

What are you wanting to add to it?  I mean there are some who have done custom firmware out there like smit.

But I'm not sure what else you would want to be installing.

Does anyone have an experience on installing any additional linux programs on the BBB sd card?

The only thing that happened was that the power for the whole mine was switched off for about an hour. During this time, a 17 kV-line was removed. However, this shouldn't result in a spike. And even if it did: Once the S4s are without power, I always have to switch them on, i.e. other devices which are on the same circuit probably would have had some failure, too.
I'll investigate the machines and probably first try to put some new firmware image on the SD-cards... Power line, network, network cables all are okay.

Did you have any surges or anything wierd on power circuit?  To have  4 separate S4's stop mining makes it sound like it's a shared issue.

I would look into power make sure everything is ok.  Next look into connection make sure each cord is active on network.  It does worry me that none are working normal.  Did  you have surge protectors on them?

Seems I'm always the guy who has bad luck...

I have currently four S4 running. Well, not correct: They were running.

First, all of them had a bad PSU. They were replaced, since then they worked pretty good.

Now, all the sudden, all of them do not come up again completely.

Four of the S4 just turn on, the LED stays blank, no connection, no hashing.

The fifth of the S4 started to hasth with 50 % but nothing is shown on the LED which is just blank, but obviously powered.

What worries me is that all five all the sudden started to behave like this... has anyone seen a similar behavior?

Same here something like this and the price going up on BTC would have made a decent difference.   I cannot be to sad as I ROI'ed and ultimatly that is the goal of every miner.

But if I would have done this and not sold when BTC was around 230 I could have squeezed a little bit more out of it.  And we always want a little more .

Thanks for sharing! Wish I would have known this when I still had S4s.