ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH

[nhando]

Just my wonderful luck, both B8 Machine my brother in law sent to me have the loud screetching sound.  Going to run out of Tape soon.  Haha

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[hawkfish007]

I have been running my B3s since I got them, they are almost out of warentee - then I get to play with them in "other" ways.

One thing I'd like to play with is running more hashboards per controller, to free up some controllers for"other experiments".

What I'm looking for, for the "other experiments".....

***** BURNT BOARDS ... I've seen some pics of just BBQ'ed board... I'd like to play around with those. Don't pick at the boards, don't pull the wires, cut the wires if the connectors seem to be stuck.

***** DEAD BOARDS, the ones showing all ---------------  I would like to also play around with those.

It does not matter what batch they are from. I just want the hashboards, not the whole unit unless the whole unit is crispy cooked and not easily disassembled.

Please keep in mind these burnt/dead boards are just scrap as they sit - the only value of those boards is gold recovery value... or a memento of wasted money & bad luck.

 Since I do not have any burnt or dead boards of my own, I'm going to need some that I can play with to see if I can help the rest of the S7 community with developing a process to recover some, most, maybe, just maybe all hashrate.

If anyone has a board or two that I can "play around with", maybe finding a work around to get these operational again, please let me know what you have and what you would want for the boards.

Thank you

bbOOmm
Wisconsin USA

Most burnt/dead board i saw had recoverable chips, which would make the board pretty valuable. Just something to keep in mind. Also Bitmain used to buy back bad boards at a good price for the same reason i presume.

Yes, Bitmain may buy back the boards to "refurbish" and stick into later batches or use as warentee replacements. BUT the end of the production run has arrived, That buyback may not be available.

As for recoverable chips, yes, the chips contain gold. A very minute amount of gold. But, unless you know how to extract that gold, which happens to be a toxic, very hazardous and creates hazardous waste extraction process - not something to do in the home.... and have a significant amount of the chips, that ~VALUABLE~ aspect is out of reach of most people. Sure you and take the burnt/dead boards to a scrap buyer, get a few $ per pound, or donate/sell the boards to me and I'll try to come up with a process or method to help the S7 community to repair/reuse their out of warentee boards to get them hashing again.

Winter is here, I need a project while I hibernate in the basement workshop.

Thanks

bbOOmm
Wisconsin, USA

Those chips could become next generation sidehack sticks. If you are interested, someone is selling an entire dead S7 on eBay

http://www.ebay.com/itm/Bitmain-Antminer-S7-Bitcoin-Miner-4-73TH-s-AS-IS-/301840247762?hash=item464714abd2:g:Ig8AAOSw3KFWfF22

[notlist3d]

I have been running my B3s since I got them, they are almost out of warentee - then I get to play with them in "other" ways.

One thing I'd like to play with is running more hashboards per controller, to free up some controllers for"other experiments".

What I'm looking for, for the "other experiments".....

***** BURNT BOARDS ... I've seen some pics of just BBQ'ed board... I'd like to play around with those. Don't pick at the boards, don't pull the wires, cut the wires if the connectors seem to be stuck.

***** DEAD BOARDS, the ones showing all ---------------  I would like to also play around with those.

It does not matter what batch they are from. I just want the hashboards, not the whole unit unless the whole unit is crispy cooked and not easily disassembled.

Please keep in mind these burnt/dead boards are just scrap as they sit - the only value of those boards is gold recovery value... or a memento of wasted money & bad luck.

 Since I do not have any burnt or dead boards of my own, I'm going to need some that I can play with to see if I can help the rest of the S7 community with developing a process to recover some, most, maybe, just maybe all hashrate.

If anyone has a board or two that I can "play around with", maybe finding a work around to get these operational again, please let me know what you have and what you would want for the boards.

Thank you

bbOOmm
Wisconsin USA

Most burnt/dead board i saw had recoverable chips, which would make the board pretty valuable. Just something to keep in mind. Also Bitmain used to buy back bad boards at a good price for the same reason i presume.

Yes, Bitmain may buy back the boards to "refurbish" and stick into later batches or use as warentee replacements. BUT the end of the production run has arrived, That buyback may not be available.

As for recoverable chips, yes, the chips contain gold. A very minute amount of gold. But, unless you know how to extract that gold, which happens to be a toxic, very hazardous and creates hazardous waste extraction process - not something to do in the home.... and have a significant amount of the chips, that ~VALUABLE~ aspect is out of reach of most people. Sure you and take the burnt/dead boards to a scrap buyer, get a few $ per pound, or donate/sell the boards to me and I'll try to come up with a process or method to help the S7 community to repair/reuse their out of warentee boards to get them hashing again.

Winter is here, I need a project while I hibernate in the basement workshop.

Thanks

bbOOmm
Wisconsin, USA

Those chips could become next generation sidehack sticks. If you are interested, someone is selling an entire dead S7 on eBay

http://www.ebay.com/itm/Bitmain-Antminer-S7-Bitcoin-Miner-4-73TH-s-AS-IS-/301840247762?hash=item464714abd2:g:Ig8AAOSw3KFWfF22

I would be a little careful on that one the seller say's it was not diagnosed but he has sold other miners.  I am thinking he likely tried to diagnose.- http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2&userid=acuratlny&&_trksid=p2047675.l2560&rt=nc&iid=301840247762&sspagename=VIP%3Afeedback&ftab=FeedbackAsSeller

I would suspect he tried to fix it and knows a little more hes saying (but that is speculation).  I don't know how he would know just 1 board shorted with out trying to diagnose.  I think anyone would try to do a few things to see if controller works, move to boards, etc.  I find it hard to sell with 0 looking into fix.

But your right if just wanting chips it could be decent for that.  

[not.you]

Batch 8 with a slight OC.  Anything higher raises the errors above .01

[philipma1957]

you think those temps are okay?

I don't but maybe I am wrong.

Batch 8 with a slight OC.  Anything higher raises the errors above .01

[cryptichermit]

So I have to re-try getting a board RMA'd to bitmain.  I bought a brand new PSU to try to power that board up hoping I was using a bad psu and there was still no go.  For those of you who have fully opened their S7, what is the easiest method to getting the top off so I can remove the problematic board?  I assume the top comes off because you can't simply slide the board out of the casing.

Remove the rectangular plate behind the fan, boards will slide out. But I would contact Bitmain before opening the miner.

Just remove the plate behind the fan and they do slide out?  What about the piece sticking above the top of the miner where the pci-e cables are connected?  That's not part of the hash board?

Yup, just removing the plate behind the fan will do. That plate is holding the boards in place.

Cool, I'll try removing it tonight.  Bitmain already agreed to 'test' the board at their facility in china.  Sucks I have to send it there, but the 3 TH hash I get from a $1600 miner really blows.

Good luck with your RMA.
I had bitmain OK sending back 2 dead hashboards, and they have had them for nearly 4 freeking weeks!
I've sent several emails and they have not responded, both via Ticket system and direct email.  Not only am I out the dead hashboards, but also out the $100 shipping fee back to them.  I also openned another ticket as I had a brand new batch 8 hashboard fail after about 10 days of hashing.  No response on that either.  Still waiting for the 5 day late payment on batch 1 too.  I'd have to say, I'm sorely dissapointed with the service received from bitmain - especially given the amount of money I've sent their way in 2015.

[OgNasty]

So I have to re-try getting a board RMA'd to bitmain.  I bought a brand new PSU to try to power that board up hoping I was using a bad psu and there was still no go.  For those of you who have fully opened their S7, what is the easiest method to getting the top off so I can remove the problematic board?  I assume the top comes off because you can't simply slide the board out of the casing.

Remove the rectangular plate behind the fan, boards will slide out. But I would contact Bitmain before opening the miner.

Just remove the plate behind the fan and they do slide out?  What about the piece sticking above the top of the miner where the pci-e cables are connected?  That's not part of the hash board?

Yup, just removing the plate behind the fan will do. That plate is holding the boards in place.

Cool, I'll try removing it tonight.  Bitmain already agreed to 'test' the board at their facility in china.  Sucks I have to send it there, but the 3 TH hash I get from a $1600 miner really blows.

Good luck with your RMA.
I had bitmain OK sending back 2 dead hashboards, and they have had them for nearly 4 freeking weeks!
I've sent several emails and they have not responded, both via Ticket system and direct email.  Not only am I out the dead hashboards, but also out the $100 shipping fee back to them.  I also openned another ticket as I had a brand new batch 8 hashboard fail after about 10 days of hashing.  No response on that either.  Still waiting for the 5 day late payment on batch 1 too.  I'd have to say, I'm sorely dissapointed with the service received from bitmain - especially given the amount of money I've sent their way in 2015.

I'm waiting on 2 dead hashboards to be RMA'd as well.  They probably won't receive my boards until next week though.  Hopefully I won't have to wait a month after that to get working boards.

[Crypto84]

does bitmain still have a warranty place in the USA? I remember when i had my S5's they had warranty services on the USA out of colorado i think. anyone know if they still do warranty stuff or is it all china now?

Edit: found "BitmainWarranty" on here. in there sig it says you can return stuff to CO

Bitmain Tech Support & Warranty: +1-844-BIT-MAIN  (844-248-6246)     Skype: BitmainEnglish (Voice Only)
E-mail: support@bitmain.zendesk.com    Teпepь cepвиcнoe oбcлyживaниe дocтyпнo нa Pyccкoм и Укpaинcкoм языкax!
Return Address: Bitmain Warranty 3700 Quebec Street, Unit 100-239, Denver, Colorado 80207, USA

[hawkfish007]

does bitmain still have a warranty place in the USA? I remember when i had my S5's they had warranty services on the USA out of colorado i think. anyone know if they still do warranty stuff or is it all china now?

Edit: found "BitmainWarranty" on here. in there sig it says you can return stuff to CO

Bitmain Tech Support & Warranty: +1-844-BIT-MAIN  (844-248-6246)     Skype: BitmainEnglish (Voice Only)
E-mail: support@bitmain.zendesk.com    Teпepь cepвиcнoe oбcлyживaниe дocтyпнo нa Pyccкoм и Укpaинcкoм языкax!
Return Address: Bitmain Warranty 3700 Quebec Street, Unit 100-239, Denver, Colorado 80207, USA

This is the reply I received trying to process warranty claim locally

"If you have received the S7 with a letter inside the box stating to contact staffs in China, you must process your warranty via info@bitmaintech.com

If you need technical assistance, we can assist you via US/EU or from Ukraine with English Speaking Staffs.

If you don't hear any response for another day, please let us know

Thank you"

[notlist3d]

does bitmain still have a warranty place in the USA? I remember when i had my S5's they had warranty services on the USA out of colorado i think. anyone know if they still do warranty stuff or is it all china now?

Edit: found "BitmainWarranty" on here. in there sig it says you can return stuff to CO

Bitmain Tech Support & Warranty: +1-844-BIT-MAIN  (844-248-6246)     Skype: BitmainEnglish (Voice Only)
E-mail: support@bitmain.zendesk.com    Teпepь cepвиcнoe oбcлyживaниe дocтyпнo нa Pyccкoм и Укpaинcкoм языкax!
Return Address: Bitmain Warranty 3700 Quebec Street, Unit 100-239, Denver, Colorado 80207, USA

I don't think that will do you any good as far as returns.  You might speak with them on phone, but you will still be RMA'ing to China.  

There are some who have claimed to buy from them and pay extra and are able to use them... but I was not ever 100 percent sure on that.   But you can ask them I'm willing to bet they still have you ship it from china.

*Edit looks like hawkfish007 confirmed this

[nhando]

Is this a good FAN replacement?  Anyone use these before?  They use up to 36W.

http://www.amazon.com/Sanyo-Denki-SAN-Ace-120mm/dp/B00QWB1X3O/ref=pd_sim_sbs_147_1?ie=UTF8&dpID=518LC-uCGVL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=1RZ2VDWHQX0M6T6AT3D1

[notlist3d]

you think those temps are okay?

I don't but maybe I am wrong.

Batch 8 with a slight OC.  Anything higher raises the errors above .01

I would want to know ambient temp.  But that is getting up there.  What does it run not OC'ed??

I to think it is most likely to high.  I don't think Batch 8 was made to OC as much as some might want it to, it simply is already very high on frequency.  And it's sure not worth losing warranty for a slight OC.

[AriesIV10]

you think those temps are okay?

I don't but maybe I am wrong.

Batch 8 with a slight OC.  Anything higher raises the errors above .01

Here are all of the measurements put together:

Calculation would be TH/s per MHz:

4.933TH / 731MHz = 6.748290013679891
4.867TH / 725MHz = 6.713103448275862
4.730TH / 700MHz = 6.757142857142857

RESULTS:  You get more TH/s at 700MHz.   The only other consideration would be the Wattage per TH/s.  Very good HW, but be cautious on the temps.

[nhando]

Would be good to know the wattage used as well to know if it's worth the small jump.  I guess you guys are lucky, all my B8 S7 if I change to 731MHZ, I would get at least .02 error rates.

[dropt]

RESULTS:  You get more TH/s at 700MHz.

No, you clearly do not "get more TH/s at 700MHz".  Perhaps you mean something else? 

   The only other consideration would be the Wattage per TH/s.

This is one of the only real considerations.

[not.you]

you think those temps are okay?

I don't but maybe I am wrong.

Batch 8 with a slight OC.  Anything higher raises the errors above .01

I would want to know ambient temp.  But that is getting up there.  What does it run not OC'ed??

I to think it is most likely to high.  I don't think Batch 8 was made to OC as much as some might want it to, it simply is already very high on frequency.  And it's sure not worth losing warranty for a slight OC.

The room this is in has an AC unit which blows outside air all day which is cold during the day and very cold during the night.  The temps in that room get up to about 73-75°F in the afternoon which is about when that screen shot was taken.  Here it is now.  Fans are at 60%.  It is only a couple hours in the afternoon when the hashing board hits the low 70's.  It will be below 70 in another hour or so.



Here is a batch 5 with fans at 60% sitting next to it.



I could bring the temps down by raising the fan speed.  There is also an oscillating fan in the room and I have found that by pointing it at the shelf with the miner intakes I can lower the temps also but I didn't really think a few hours in the low 70's was a big deal.

[nhando]

What PSU are you using? I noticed I was able to get 4900-4950 with EVGA at 731M but only 4850 with the IBM 2K PSU for 2 S7

[not.you]

What PSU are you using? I noticed I was able to get 4900-4950 with EVGA at 731M but only 4850 with the IBM 2K PSU for 2 S7

If you are asking me I have EVGA 1600's on my S7's.

[nhando]

Me = Not.You,  so I don't know who I'm asking...........as I'm asking "Not.You"

I'm curious why my EVGA G2 1300W is handling the S7 OC better than my IBM 2KW PSU especially since it's pulling way more than 100% of it's power capacity as the S7 is pulling much more than 1450W at the wall.

[mavericklm]

maybe your IBM 2KW PSU is a bit too old....

i have an dps1200bb that is eating 820watt on one miner, i change the psu and the same miner is ''eating'' 770watt!