ANTMINER S4 Discussion and Support Thread

[dogie]

Remember that if you're overclocking you [officially] lose your warranty, and I personally wouldn't go up more than 1 voltage step on the stock PSU.

How long is the warranty? 30 days?

Its not stated on the page but I believe its 90 days.

[1713928888]

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[1713928888]

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[1713928888]

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[Tupsu]

Remember that if you're overclocking you [officially] lose your warranty, and I personally wouldn't go up more than 1 voltage step on the stock PSU.

How long is the warranty? 30 days?

Its not stated on the page but I believe its 90 days.

Does the S2 lifetime warranty?

Could you confirm this?
...We have already contacted Bitmain and they state that item is under lifetime warranty and boards may be returned for repair or replacement for free.  We would like to sell item instead of going to taking the time to return. ...
https://bitcointalk.org/index.php?topic=870784.0

[dogie]

Remember that if you're overclocking you [officially] lose your warranty, and I personally wouldn't go up more than 1 voltage step on the stock PSU.

How long is the warranty? 30 days?

Its not stated on the page but I believe its 90 days.

Does the S2 lifetime warranty?

Could you confirm this?
...We have already contacted Bitmain and they state that item is under lifetime warranty and boards may be returned for repair or replacement for free.  We would like to sell item instead of going to taking the time to return. ...
https://bitcointalk.org/index.php?topic=870784.0

Checking, might be a while as quite a few staff heading to the St Peters' conference.

[pak13]

Remember that if you're overclocking you [officially] lose your warranty, and I personally wouldn't go up more than 1 voltage step on the stock PSU.

How long is the warranty? 30 days?

Its not stated on the page but I believe its 90 days.

The minimum warranty is country dependent as defined in their consumer protection laws. eg, U.S 90 days, AU 365 days.

Be very cautious of what is classified as "life-time". Some companies will define it as the expected time the product will be used before being obsolete. ie. by their next model.

[dogie]

Remember that if you're overclocking you [officially] lose your warranty, and I personally wouldn't go up more than 1 voltage step on the stock PSU.

How long is the warranty? 30 days?

Its not stated on the page but I believe its 90 days.

Does the S2 lifetime warranty?

Could you confirm this?
...We have already contacted Bitmain and they state that item is under lifetime warranty and boards may be returned for repair or replacement for free.  We would like to sell item instead of going to taking the time to return. ...
https://bitcointalk.org/index.php?topic=870784.0

Checking, might be a while as quite a few staff heading to the St Peters' conference.

Confirmed its 90 days.

[aclass]

Confirmed its 90 days.

90 days from the day of SHIPPING - no matter how much time it takes to get to you and BITMAIN enforce this...

I was late with like 3 days to submit the issue and they refused to honor the warranty

[Truman]

Thank you very very much!

Did somebody get higher hashrates? Cooling, power from the wall and psu (i have changed) is no problem.

Check out this post.  https://bitcointalk.org/index.php?topic=796839.msg9619577#msg9619577

Running!

Thank you! Are there any further higher hashrates anybody got?

[Truman]

voltage 0775
using two power supply

Running! 

Thank you! Are there any further higher hashrates anybody got?

[MissouriMiner]

I would like to have a couple S4's using just under 1000W each at the wall.  I'm trying to run 2x S4's on a single 20A 120V circuit (temporarily), so I don't want them exceeding 2000W aggregate. Does anyone have recommended settings to achieve this?   I'm guessing the MHz should be around 160.  What is the formula for determining what voltage to use based on MHz setting?   It's like one of those IQ tests and unfortunately I can't figure this one out.  Burn on me.... lol

You could probably get a frequency code from the s3 thread that would apply to the s4.

My guess is 160-170mhz at 0.65-0.67v would achieve that

Thanks for the input.  So far, I'm using 162.5 MHz and 0.67 V, which gets 1.5 TH/s at 950-1000 Watts (depending on fan speeds).

After running with 162.5 and 0.67v for several hours, some of the chips started changing from O to X.  Something like; after 1 hour 1 X, after 3 hours 2 X's, after 6 hours 5 X's.  When running at stock settings, it never had any X's.  With the underclocked settings, is there an obvious issue that causes this problem?  Such as, voltage too low, or too high?

[Cyper_BLC]

Guys i must to clear this o-x what are these means;

every hash Cell must feed proper voltage and frequence so,

if you see - , this means = you dont feed this cell with proper voltage
(use higher Voltage,because some devices used on high voltage before we bougt)

if you see x , this means = your working frequence did not enought of Cell for live
(use higher Freq,because some devices used on high freq before we bougt)

if you see nothing, this means = This ASIC cell is not communicate with FPGA
(weak soldering or DEATH, if you lucky Re oven the hash board)

or you can try this when you see x or - => use web interafce goto Miner Configuration>General Settings then just click Save&Apply
you will see x or - gone because FPGA is resetted.

have a nice days.

i forgot this >Maybe reason of x-o stuation is broken fpga test communication, because asic test.sh working with cgminer when your system hashing.
if your system is hashing proper speed, you dont worry about that because its software bug.
And also write this calculation into your notes. If you want adjusting voltage and freq. You must to use my calculation;
Your Desired Clock Speed (depends Gh/s) x 0.00358(my constant) = Optimum Voltage Settings.
example if you want to use 187.5Mhz x 0.00358 = 0.671 V will be best energy eff. adjust.

i want to help peoples and hope to bugless products, so any donations is accepted if you be this useful. thanks.

[MissouriMiner]

Guys i must to clear this o-x what are these means;

every hash Cell must feed proper voltage and frequence so,

if you see - , this means = you dont feed this cell with proper voltage
(use higher Voltage,because some devices used on high voltage before we bougt)

if you see x , this means = your working frequence did not enought of Cell for live
(use higher Freq,because some devices used on high freq before we bougt)

if you see nothing, this means = This ASIC cell is not communicate with FPGA
(weak soldering or DEATH, if you lucky Re oven the hash board)

or you can try this when you see x or - => use web interafce goto Miner Configuration>General Settings then just click Save&Apply
you will see x or - gone because FPGA is resetted.

have a nice days.

i forgot this >Maybe reason of x-o stuation is broken fpga test communication, because asic test.sh working with cgminer when your system hashing.
if your system is hashing proper speed, you dont worry about that because its software bug.
And also write this calculation into your notes. If you want adjusting voltage and freq. You must to use my calculation;
Your Desired Clock Speed (depends Gh/s) x 0.00358(my constant) = Optimum Voltage Settings.
example if you want to use 187.5Mhz x 0.00358 = 0.671 V will be best energy eff. adjust.

i want to help peoples and hope to bugless products, so any donations is accepted if you be this useful. thanks.

Bitmain posted the information in the table, on the first page of this thread.  Your calculation is very different for the bottom 2 recommendations.  I do not know what to think since your recommendation is much different than the manufacturer.

[suchmoon]

Bitmain posted the information in the table, on the first page of this thread.  Your calculation is very different for the bottom 2 recommendations.  I do not know what to think since your recommendation is much different than the manufacturer.

Obviously voltage to frequency ratio is not linear. Otherwise undervolting would be pointless, the goal is not to make your miner slower, but to make it more efficient (i.e. more hash per watt). Don't use any magic constants, try Bitmain's recommended values and tweak them around to find the best settings.

[notlist3d]

(saving space)

voltage 0775
using two power supply

Running!  

Thank you! Are there any further higher hashrates anybody got?

Wow that is a impressive speed.  How many watts does it use to get in the mid 2T and more?   Are you able to take picture of two power supply unit?

[dogie]

after the payment (btc) has been more than 48 hours, but the order status is still "unshipped" 

Bitmain prioritises actually shipping over telling you they've shipped. When you get tracking it'll likely be a day into its journey.

[Cassey]

Your Desired Clock Speed (depends Gh/s) x 0.00358(my constant) = Optimum Voltage Settings.
example if you want to use 187.5Mhz x 0.00358 = 0.671 V will be best energy eff. adjust.

Trying this on one of my S4s vs. the previous recommended 0.685V at 187.5.

Been running a few hours, so far, so good. 

[dmwardjr]

One of my four S4's LCD screen is blank.  It will not boot up.  The LCD lights up but just stays blank.  Can someone help?

[Bitkoinzz]

One of my four S4's LCD screen is blank.  It will not boot up.  The LCD lights up but just stays blank.  Can someone help?

Yes I can tell you exactly what the problem is. If you have rebooted a couple times and the screen is blank that means the SD card has moved a little inside the S4 and the firmware is not being read and booting up the machine.. You need to remove the 6 screws on top of the case, pull off the cover straight up, look inside and find the SD card, push it in and it will then pop out, then reinsert. The S4 will work then. I had to do this on 2 out of 4 today.

[dmwardjr]

One of my four S4's LCD screen is blank.  It will not boot up.  The LCD lights up but just stays blank.  Can someone help?

Yes I can tell you exactly what the problem is. If you have rebooted a couple times and the screen is blank that means the SD card has moved a little inside the S4 and the firmware is not being read and booting up the machine.. You need to remove the 6 screws on top of the case, pull off the cover straight up, look inside and find the SD card, push it in and it will then pop out, then reinsert. The S4 will work then. I had to do this on 2 out of 4 today.

Okay!!!

Thank you very much for the quick response!

I'll give it a try.

I've shut it off and back on several times to no avail.  So, let me give what you said a whirl...

 

[MrTeal]

One of my four S4's LCD screen is blank.  It will not boot up.  The LCD lights up but just stays blank.  Can someone help?

Yes I can tell you exactly what the problem is. If you have rebooted a couple times and the screen is blank that means the SD card has moved a little inside the S4 and the firmware is not being read and booting up the machine.. You need to remove the 6 screws on top of the case, pull off the cover straight up, look inside and find the SD card, push it in and it will then pop out, then reinsert. The S4 will work then. I had to do this on 2 out of 4 today.

Okay!!!

Thank you very much for the quick response!

I'll give it a try.

I've shut it off and back on several times to no avail.  So, let me give what you said a whirl...

 

If that doesn't work, power down one of the other ones and create an SD card image (win32diskimager works well), then flash it to the SD card on the bad unit.

[dmwardjr]

One of my four S4's LCD screen is blank.  It will not boot up.  The LCD lights up but just stays blank.  Can someone help?

Yes I can tell you exactly what the problem is. If you have rebooted a couple times and the screen is blank that means the SD card has moved a little inside the S4 and the firmware is not being read and booting up the machine.. You need to remove the 6 screws on top of the case, pull off the cover straight up, look inside and find the SD card, push it in and it will then pop out, then reinsert. The S4 will work then. I had to do this on 2 out of 4 today.

That did the trick, Sir...

THANK YOU VERY MUCH!!!

Added two new S3's and four new S4's to my little farm.  Went up from 9.2 TH/s to 18 TH/s.  So, I've almost doubled.

I will delete the pic in a few hours.  Please don't mind the mess with the wiring.  They are about to be moved to a new closet I'm building.



I'm building a larger closet in my recreation room to house up to 96 S4's.  I will delete this picture in a few hours.