Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 103. (Read 527798 times)

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: [email protected]    Teпepь cepвиcнoe oбcлyживaниe дocтyпнo нa Pyccкoм и Укpaинcкoм языкax!
Return Address: Bitmain Warranty 3700 Quebec Street, Unit 100-239, Denver, Colorado 80207, USA

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.

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.

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 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.  

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

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

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

My power hungry batch 8 works at 737Mhz, GHS/ 5 sec shows little bit over 5000 Gh/s and avg 4920gh/s with std APW3 power,
my other batch 8 is 300Gh/s slower with 700mhz which is usable max for it.

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.

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

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.

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

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?

I hope you are confused.

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

Thanks for the information.  It does not look like the higher frequency would be beneficial.  Let me do the math:  

Calculation would be TH/s per MHz:
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.  

Welll,

Reading all the nightmare stories about the S7 B8's, and having ordered a couple S7 B9's, I guess I'll play with my immersion cooling idea with the B9's since it seems that Bitmain has overclocked the B8's and B9's to get NEAR the advertised hashrate but by doing so, has shortened the life span due to the excessive heat generated by overclocking.

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.