Hi guys, I have found a lot of people having problems with there AntMiner S4 and not getting proper hashing... When I first hooked up mine I was only getting 800ghs... This is how I fixed it.
https://www.youtube.com/edit?o=U&video_id=bdhjjHDA_wk
Topic: [Guide] Dogie's Comprehensive Bitmain Antminer S4 Setup [HD] - page 11. (Read 49566 times)
Anyone know what the max safe overclock gh/s is and the power consumption? Thanks 
btw great set up guide as always
btw great set up guide as always
PSU gets maxed out by about 2.3-2.4GHz. You may need lower if chips start dropping out.
Has anyone done a study to map out frequency to overall hashrate? And what voltage to use? Since they advertise up to 10% possible on some units, I think 218.75 is a good number to try, but what should the voltage be set to?
Anyone know what the max safe overclock gh/s is and the power consumption? Thanks
btw great set up guide as always
btw great set up guide as always
PSU gets maxed out by about 2.3-2.4GHz. You may need lower if chips start dropping out.
Anyone know what the max safe overclock gh/s is and the power consumption? Thanks
btw great set up guide as always
btw great set up guide as always
Ok I will wait then. I've also got this question. I'd like to use this miner part of the time. Does anyone know if it's safe to turn on and off the miner using the small button on the back next to the power supply? (By holding down the button for 3sec). I don't want to slowly wreck this machine but there's also no way that I can sleep with it on.
Thanks!
Thanks!
Can the fans be replaced with something quieter? I bought two of these and they are super loud.
BTW: I am we6jbo on here however I don't remember what email I used years ago.
BTW: I am we6jbo on here however I don't remember what email I used years ago.
I would wait to see if we get fan profiles via firmware first.
Can the fans be replaced with something quieter? I bought two of these and they are super loud.
BTW: I am we6jbo on here however I don't remember what email I used years ago.
BTW: I am we6jbo on here however I don't remember what email I used years ago.
I know, I rewrote that ^_^
Power supply replacement for the Antminer S4
Dear loyal customers,
Today we have found out that the batch of power supplies shipped out in batch 1 and the first part of batch 2 Antminer S4s contain a critical defect. The customized power supply produced by AplusPower Co. Ltd is suffering from an unacceptably high failure rate and will be replaced with immediate effect.
We take full responsibility for the problems caused and had not anticipated the unique loading conditions of a miner when selecting and testing the suitability of these power supplies. You can read more about the defect in the post below.
We are now taking steps to ensure that customers are impacted as little as possible. The rest of batch 2 S4s will come with the improved power supply as standard.
The following actions are being taken for miners already delivered:
1) If your PSU has already failed:
• Submit a RMA request with some pictures and proof [ie with your username in the photo] of your PSU’s failure to [email protected].
• We will then ship a new PSU out as soon as possible.
• We will also issue compensation to the value of 10 days of mining profit calculated starting from shipping date
2) If your PSU has not failed and the miner is running normally:
• We will ship a new PSU to you.
• Please do not contact support yet, you will receive an email asking to confirm your shipping.
Analysis of power supply failures within the first batch of Antminer S4s
We are sorry for the inconvenience you may have experienced regarding power supply failures, or even sporadic events of smoke from our first batch of Antminer S4s. We immediately set out to investigate the reports of failed power supplies from customers, and have made immediate changes to improve the quality of future deliveries. What happened with these power supplies is not acceptable.
The power supplies failed by two different mechanisms:
1) Failed TR1 or TR2 MOSFETs on the power factor correction (PFC) circuitry.
After investigations, it was found that the unusual service conditions a miner puts on its power supply was the cause of the failure. The repeated abrupt, dynamic loading generated significant current through the PFC circuits, eventually leading to the failure of the TR1 or TR2 MOSFETs.
The replacement power supplies have significantly upgraded PFC circuits in order to improve performance and prevent a recurrence of the problem.
2) Failed MOSFET on the output Synchronous rectifier circuit
A MOSFET on the output Synchronous rectification circuit was also found to be failing, due to the repeated and sudden load changes during the miners’ operation.
During normal operation, the output MOSFET is expected to carry a current of approximately 30A and operate at a surface temperature of around 80C. The failing MOSFET was found to be heating up significantly further than this, causing the carbonized black PCBs and smoking thermal pad.
It is worth noting that although a failed output MOSFET at high temperatures may result in some smoke from the PCB and thermal pad, it will not start a fire. All internal components of the PSU meet the requirements of the UL94-V0 flame retardancy standard, which certifies that any ignition will self-extinguish within a maximum of 10 seconds.
In response to this problem, the sample filter in the Synchronous rectifier circuits have been altered to erase the excessive current, and so the MOSFET will not fail again. In addition, several high temperature prevention circuits have been added which will better protect the power supply from overloading and excessive temperatures.
Moving forwards
We always perform significant dynamic testing on chosen power supplies, however in this case we failed to recognize the special conditions and specific loading characteristics the miner would place on the power supply. Our testing has been altered to replicate and include these loading characteristics on any power supplies introduced in the future. Once again, we are sorry.
Dear loyal customers,
Today we have found out that the batch of power supplies shipped out in batch 1 and the first part of batch 2 Antminer S4s contain a critical defect. The customized power supply produced by AplusPower Co. Ltd is suffering from an unacceptably high failure rate and will be replaced with immediate effect.
We take full responsibility for the problems caused and had not anticipated the unique loading conditions of a miner when selecting and testing the suitability of these power supplies. You can read more about the defect in the post below.
We are now taking steps to ensure that customers are impacted as little as possible. The rest of batch 2 S4s will come with the improved power supply as standard.
The following actions are being taken for miners already delivered:
1) If your PSU has already failed:
• Submit a RMA request with some pictures and proof [ie with your username in the photo] of your PSU’s failure to [email protected].
• We will then ship a new PSU out as soon as possible.
• We will also issue compensation to the value of 10 days of mining profit calculated starting from shipping date
2) If your PSU has not failed and the miner is running normally:
• We will ship a new PSU to you.
• Please do not contact support yet, you will receive an email asking to confirm your shipping.
Analysis of power supply failures within the first batch of Antminer S4s
We are sorry for the inconvenience you may have experienced regarding power supply failures, or even sporadic events of smoke from our first batch of Antminer S4s. We immediately set out to investigate the reports of failed power supplies from customers, and have made immediate changes to improve the quality of future deliveries. What happened with these power supplies is not acceptable.
The power supplies failed by two different mechanisms:
1) Failed TR1 or TR2 MOSFETs on the power factor correction (PFC) circuitry.
After investigations, it was found that the unusual service conditions a miner puts on its power supply was the cause of the failure. The repeated abrupt, dynamic loading generated significant current through the PFC circuits, eventually leading to the failure of the TR1 or TR2 MOSFETs.
The replacement power supplies have significantly upgraded PFC circuits in order to improve performance and prevent a recurrence of the problem.
2) Failed MOSFET on the output Synchronous rectifier circuit
A MOSFET on the output Synchronous rectification circuit was also found to be failing, due to the repeated and sudden load changes during the miners’ operation.
During normal operation, the output MOSFET is expected to carry a current of approximately 30A and operate at a surface temperature of around 80C. The failing MOSFET was found to be heating up significantly further than this, causing the carbonized black PCBs and smoking thermal pad.
It is worth noting that although a failed output MOSFET at high temperatures may result in some smoke from the PCB and thermal pad, it will not start a fire. All internal components of the PSU meet the requirements of the UL94-V0 flame retardancy standard, which certifies that any ignition will self-extinguish within a maximum of 10 seconds.
In response to this problem, the sample filter in the Synchronous rectifier circuits have been altered to erase the excessive current, and so the MOSFET will not fail again. In addition, several high temperature prevention circuits have been added which will better protect the power supply from overloading and excessive temperatures.
Moving forwards
We always perform significant dynamic testing on chosen power supplies, however in this case we failed to recognize the special conditions and specific loading characteristics the miner would place on the power supply. Our testing has been altered to replicate and include these loading characteristics on any power supplies introduced in the future. Once again, we are sorry.
FYI - Feedback regarding network setup instructions. My S4 out of the box used DHCP and worked fine on an alternate subnet than 192.168.1.x. All of my miners use subnet 192.168.44.x. The S4 was assigned an IP address from that subnet and worked fine. I looked at the front of the S4 for the IP (192.168.44.3), and accessed via web browser no problem. My S4 is from batch 2. It shipped from Bitmain on Oct 9.
Some of B1 shipped as static, some shipped as DHCP. I'll change it as more B2s come out (DHCP).
FYI - Feedback regarding network setup instructions. My S4 out of the box used DHCP and worked fine on an alternate subnet than 192.168.1.x. All of my miners use subnet 192.168.44.x. The S4 was assigned an IP address from that subnet and worked fine. I looked at the front of the S4 for the IP (192.168.44.3), and accessed via web browser no problem. My S4 is from batch 2. It shipped from Bitmain on Oct 9.
Can we come up with some PSU replacement options ? I'm starting to think the custom PSU might have a issue…
It will be difficult due to the formfactor of the PSU, potentially a DPS2000bb is the closest you'll get.
Can we come up with some PSU replacement options ? I'm starting to think the custom PSU might have a issue…
http://postimg.org/image/xp75t9jx1/
http://postimg.org/image/3ulmdi42d/
http://postimg.org/image/kjn29f0np/
http://postimg.org/image/xp75t9jx1/
http://postimg.org/image/3ulmdi42d/
http://postimg.org/image/kjn29f0np/
Sure the best conclusion is not to buy Bitmain's S4...
LULZ at dogies crappy wrong answers......
This bitmain job is above you dogie, you should go back to copy/pasting guides, advertising scam pools & ripping off noobs for VAT in the sales thread.......
This bitmain job is above you dogie, you should go back to copy/pasting guides, advertising scam pools & ripping off noobs for VAT in the sales thread.......
This user is angry at a pool and so is flaming me... makes sense.
LULZ at dogies crappy wrong answers......
This bitmain job is above you dogie, you should go back to copy/pasting guides, advertising scam pools & ripping off noobs for VAT in the sales thread.......
This bitmain job is above you dogie, you should go back to copy/pasting guides, advertising scam pools & ripping off noobs for VAT in the sales thread.......
So, confirmation that it is not a firmware issue, but a hardware issue - and that the upcoming firmware release, if/when it arrives, is only a workaround:
A fix is a fix isn't it? I'm not a big fan of BBs; I think there are better controllers to start off with but its the architecture their code has been made on so its would delay everything way tooo long to try and change it mid product cycle.
No, it isn't a "fix" - it's a firmware "hack" (ck's words) to try and get around untested & inferior hardware. A bodge.
So, confirmation that it is not a firmware issue, but a hardware issue - and that the upcoming firmware release, if/when it arrives, is only a workaround:
A fix is a fix isn't it? I'm not a big fan of BBs; I think there are better controllers to start off with but its the architecture their code has been made on so its would delay everything way tooo long to try and change it mid product cycle.
So, confirmation that it is not a firmware issue, but a hardware issue - and that the upcoming firmware release, if/when it arrives, is only a workaround:
Ah, that explains it - thanks ck. Diddogiemain bitmain say if they would replace the controller in the next batch - or will they just keep using the workaround (i.e. hack)?
I get the feeling bitmain are paying the wrong person......
Many thanks to ckolivas once again for all his efforts!
I'm a little confused tbh, as ck says:
Which to me sounds like a hardware issue - or is it the firmware that decides how much power is provided to the controller?
It's not a firmware issue. The controller hardware they bundle with it is not fast enough to handle running at low diffs, and most pools start at a lower diff for a while before vardiff pushes them up. If they stay low diff long enough the controller never catches up. I gave them a driver code workaround (i.e. hack) to get over this hurdle. It means they'll (appear to) run at low hashrates for a while until the pool reaches a diff suitable for the device. When they say it's a firmware issue, they mean they'll offer new firmware with an updated cgminer to address the issue.It turns out the controller is so low powered that it can only process ~30 shares per second which mean that unless diff is set higher, they work their way into a death spiral before diff catches up. Great...
Which to me sounds like a hardware issue - or is it the firmware that decides how much power is provided to the controller?
Ah, that explains it - thanks ck. Did
I get the feeling bitmain are paying the wrong person......
Many thanks to ckolivas once again for all his efforts!
...
None of what you've described is any excuse for your attitude whatsoever. Fixed 1 link and 1 number.
Let's hope that's not Bitmain being not happy about a Q&D copy paste that not enough effort was spent on it to check it was accurate ...None of what you've described is any excuse for your attitude whatsoever. Fixed 1 link and 1 number.
LOL
Welcome to dogies bitmain "non-answers" page.......no conflict of interest here
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