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Question: Have you had 1 or more hash board(s) fail in your batch 8 S7? If so, please specify which.  (Voting closed: April 02, 2016, 05:55:21 PM)
B8 working as expected for less than 2 weeks - 5 (16.1%)
B8 working as expected for more than 2 weeks - 8 (25.8%)
B8 board died within 2 weeks (specify which board failed below) - 4 (12.9%)
B8 board died after more than 2 weeks (specify which board failed below) - 1 (3.2%)
Board 1 died - 4 (12.9%)
Board 2 died - 1 (3.2%)
Board 3 died - 2 (6.5%)
More than 1 board died (Please specify in post) - 1 (3.2%)
I've had a board die from a previous batch (please don't vote above, instead post which batch and board #) - 5 (16.1%)
Total Voters: 27

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Author Topic: Collecting Data on B8 S7 Failure Rates  (Read 4275 times)
yslyung
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January 06, 2016, 05:10:29 PM
 #21

not b8 not mine, one of my friends s7 :

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January 06, 2016, 09:09:22 PM
 #22


it was originally powered by a gold 1350w PSU, but for better effiviency its now split  between the 1350W gold(2 blades + controller) and a 650W gold(1 blade) since i was otherwise running at 90-95% capacity on the single PSU


I've done almost the same, 1300 EVGA powers 2 blades, and NOX URANO 850 TX powers 1 board+ controller.
Running at max 61c, but I'm not doing any overclock ( for now) Cheesy
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January 06, 2016, 09:25:56 PM
 #23

not b8 not mine, one of my friends s7 :

https://i.imgur.com/drWMcJ2.jpg

Scarry, I see 2 burned PCIe cables, was he powering each blade with 2 PCIe only?

For quality risers, splitters or 133 CFM fans, please visit my eBay listings,
http://www.ebay.com/sch/hawkfish007/m.html?_ipg=50&_sop=12&_rdc=1
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January 06, 2016, 10:38:42 PM
 #24

3 pcie, 3rd can't see cuz it's molten pcie LoL
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January 07, 2016, 04:43:03 AM
 #25

which file did you have to modify to get it to work <20%?

Ive had mine almost two weeks, been feeding it outside air (below freezing) and its been at these settings for over 48hrs now:

18% fans (had to modify a file to use settings <20%)
725Mhz = 4.85TH, 0.012% errors, temps 62-68C

it was originally powered by a gold 1350w PSU, but for better effiviency its now split  between the 1350W gold(2 blades + controller) and a 650W gold(1 blade) since i was otherwise running at 90-95% capacity on the single PSU

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January 07, 2016, 07:44:10 PM
 #26

Does anyone here have successfully get board replacment from bitmain?
I have sent both email and ticket got no reply at all.. its almost a week already.
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January 07, 2016, 09:00:28 PM
 #27

S7 received, preliminary 20 mins run gives 4.74TH/s fan 50%, watt 1440 on two 1050 EVGA GS/G2. I estimated 1475w based on Bitmain's numbers. So a EVGA g2 1300 would run this fine albeit at 1450Watts~


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January 07, 2016, 09:29:33 PM
 #28

Does anyone here have successfully get board replacment from bitmain?
I have sent both email and ticket got no reply at all.. its almost a week already.


Yes, 2 boards and a fan replaced.

For quality risers, splitters or 133 CFM fans, please visit my eBay listings,
http://www.ebay.com/sch/hawkfish007/m.html?_ipg=50&_sop=12&_rdc=1
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January 08, 2016, 04:46:31 PM
 #29

November 2015 2 x antminer S7 batch 5 from antminerdistribution.com, these guys are based in the Netherlands, Europe.

Long story short: 1 Miner gave in almost immediately after power up.. hashing for one hour before it went dead....
Miner 2 took about 10 days to stop hashing on blade 1 en reduce hashing on blade 2...

after a couple of  emails between me and antminerdistribution.com..
1  miner sent back to them within a week...

2 blades and a controller (controller just to be sure) returned to AD within about 2 weeks.

To keep things positive: 
this company is doing everything in their power to find a solution, great communication, they call me instead of having me to call them.


Not happy, however the guys from this seller absolutely ROCK! keep up the good work ;-)
Really hope the manufacturer takes as much care of their customers as these guys...

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January 18, 2016, 01:15:22 PM
 #30

S7 received, preliminary 20 mins run gives 4.74TH/s fan 50%, watt 1440 on two 1050 EVGA GS/G2. I estimated 1475w based on Bitmain's numbers. So a EVGA g2 1300 would run this fine albeit at 1450Watts~

Almost through the first 2 weeks. The miner mine 4.72 TH/s when supercooled (Fans@3k, Temp at 50c). The HWE% is still at 0. 130 errors in 5 days. So far so good, i hope the unit last a long time.

With the 0 HWE% i guess i would be able to get a good OC potential out of it. But on 120v15A breakers, i'd be pushing the circuit over 80% load, so, maybe in the future if i get access to 240v or 20a breakers.


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January 19, 2016, 10:06:30 AM
Last edit: January 19, 2016, 10:49:37 AM by Frank-White
 #31

Just had a board failing on a S7  (4,73 TH/s) .. not to my surprise board number 1

Bad engineering from Bitman.

Why?

Board 1 has the small heatsinks on the outside (half the size of the inside heatsinks) AND the airflow is partially blocked by the fan mounting plate on the inlet and exhaust...
no wonder board 1 will fail first... it just isn't getting enough cooling... fans @ 75% in a 10 degree centigrade room.

Taking the board out an replacing it with a "dummy filler" so it will keep on hashing at 66% while waiting for a replacement.

looking at the failure rates it doesn't come as a surprise that board 2 has the lowest failure rates, there is logic in 1 failing first and 3 failing second, when looking at the size and placement of the heatsinks.

other S7 (4,86) running smooth in the same room for a week now..

edit: fan percentage added/typo
yslyung
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January 19, 2016, 04:36:09 PM
 #32

received my b8 replacement boards, took roughly abt 2 weeks, they're mining fine now for abt 8 hrs or so.

boards are ver 1.1
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January 19, 2016, 04:43:58 PM
 #33

Just had a board failing on a S7  (4,73 TH/s) .. not to my surprise board number 1

Bad engineering from Bitman.

Why?

Board 1 has the small heatsinks on the outside (half the size of the inside heatsinks) AND the airflow is partially blocked by the fan mounting plate on the inlet and exhaust...
no wonder board 1 will fail first... it just isn't getting enough cooling... fans @ 75% in a 10 degree centigrade room.

Taking the board out an replacing it with a "dummy filler" so it will keep on hashing at 66% while waiting for a replacement.

looking at the failure rates it doesn't come as a surprise that board 2 has the lowest failure rates, there is logic in 1 failing first and 3 failing second, when looking at the size and placement of the heatsinks.

other S7 (4,86) running smooth in the same room for a week now..

edit: fan percentage added/typo

What C where you reading on the board? All my boards are +- 2c from one another; 53C, 51C, 52C. So if board one had poorer heatsink i think you would be able to see the difference somewhat in the temp readings?


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January 21, 2016, 07:13:31 PM
 #34




"What C where you reading on the board? All my boards are +- 2c from one another; 53C, 51C, 52C. So if board one had poorer heatsink i think you would be able to see the difference somewhat in the temp readings?"

At the moment I am reading 56 on Chain 1
and 62 on chain 2
Freq 693 fans @ 45% room temp 20 centigrade

To me it looks like the side boards suffer most from the air obstruction of the fan mounting plates

.
Replaced the broken board with a "dummy" piece of hardwood.
Had to "wedge" the side on the intake, otherwise the fan was blowing air back.
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January 21, 2016, 07:21:48 PM
 #35




"What C where you reading on the board? All my boards are +- 2c from one another; 53C, 51C, 52C. So if board one had poorer heatsink i think you would be able to see the difference somewhat in the temp readings?"

At the moment I am reading 56 on Chain 1
and 62 on chain 2
Freq 693 fans @ 45% room temp 20 centigrade

To me it looks like the side boards suffer most from the air obstruction of the fan mounting plates

.
Replaced the broken board with a "dummy" piece of hardwood.
Had to "wedge" the side on the intake, otherwise the fan was blowing air back.

I see, so your temps goes up in the 60s.

Maybe this is a tip that can help people, or maybe not but; When i put it on the left side, at least thats the side i got mine on, the temps are much tighter, the lower temp is higher but the highest temp is lower.

Hopefully that doesnt break anything but thats what the sensors report.


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January 23, 2016, 02:13:57 AM
 #36

I have been running mine for over a month straight, no issues and only a 0.0085% HW error rate. Fans are currently set to 40% and it has hosted with toom.im so lots of airflow around it. I do have it up for sale but its been without any issues since I got it!

Panel: https://i.imgur.com/CwUSlW0.png
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January 29, 2016, 05:26:48 PM
 #37

My first batch 8 unit delivered in December has lost a hash board.
I've swapped the cable from control to board and tried a different power supply.
The other two boards are hashing fine except one of them runs 10c higher than the rest of all S7 hash boards including the other one which is running int he unit with the failed board.
This is also the first S7 I bought which has the whooooooo whooooooo sound that is so annoying. I love the sound of fans, but that noise will make you crazy.


No response from Bitmain as the first 24 hours since initial contact winds down.
I sent an e-mail to info, I sent a follow up to Yoshi, and called Colorado and left a voice message which went was not returned.
I will fill out a ticket but I thought info@bitmaintech was handling all warranty claims on S7s.
If you e-mail them about buying 100 S7s you get a response pretty fast. Within a few hours or less depending on the time of day there. You e-mail about a warranty problem and wait, and wait.



Transaction fees go to the pools and the pools decide to pay them to the miners. Anything else, including off-chain solutions are stealing and not the way Bitcoin was intended to function.
Make the block size set by the pool. Pool = miners and they get the choice.
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January 29, 2016, 05:35:06 PM
 #38

there's a way to get 1 bitcoin per month?HuhHuh?
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January 29, 2016, 10:31:18 PM
 #39

I saw a posting in the "Main Antminder S7" thread about a Chinese Spring Festival that starts now, and runs for about two weeks.  Just thought folks here might want to know, and/or to confirm it.
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January 30, 2016, 09:43:33 PM
 #40

Yeah, I was trying to even buy a hash board so I could run until after the celebration but I was told there are not any more shipments leaving mainland China for the continental US until after.

**Edit 1: My apologies for the size of the pictures. If the mods want them removed so it doesn't take the whole page let me know.)
**Edit 2: The last time I posted a bunch of pictures I received some interesting actions. I didn't strip personal information and it isn't being lazy, I use my real name quite a bit, but usually not completely out in public. I'd appreciate not using it openly or using my personal information against me in any way haha, but if you have recommendations of security aspects please tell me.


I cannot wait for some real competition in the miner hardware manufacturing field. I know that there aren't any companies who are going to challenge bitmain on every front. They have dug in, and any hardware built is hardware sold no matter what.
...But, if just one company with a vision for long term relationships building long term success comes in the hardware arena I don't care how low bitmain drops the price, they will lose massive amounts of orders.

Many of you have heard me mention this in the past but in my company, there is a core group of guys who will do whatever it takes, whenever it takes - to keep our customers running. Hell, we do it for people who have never even purchased a product from us just so we can begin to earn their trust and respect.
The best thing about it, this kind of behavior becomes a habit, a way of thinking, and a real way of doing business.  
We offer free phone support for whoever has the product as long as someone has it and is trying to make it run. It isn't support for life, as in your life, it is free support as long as anyone who has possession of the product would like to have assistance, 24x7x365.

Sure, we have some people who abuse our after hours emergency support and call to ask something extremely simple, but, for all of those times I've answered the emergency line and the guy asked me to help him with a part number for a bolt there are also the few times per year when the VP / CEO of a large competitors client calls because his entire production facility is about to begin sending people home because they don't have a system functioning. Not to mention our own clients who are all very important. At least the big boys can usually afford backup systems where the Mom and Pop shop or the guy with his equipment in a garage behind his house with his house mortgaged to the hilt and he is taking a gamble with every penny they have right down to the kid's college tuition and their retirement money...

You may think how can a bitcoin miner and those situations have common attributes? Or, some people say 'You should never invest more than you can afford to lose" ...and I agree with that line of thought in almost all situations, especially bitcoin related, but...

Everyone has their own reasons for purchasing a miner, and everyone has their own level of importance this box has in their lives. It should be just as important, if not more important to cater to the problem situations no matter who it is, when it is. We are talking about a scenario every single one of us who deal with the RMA process with these guys must go through. Dont get me wrong, I know there are some people who've had fantastic experiences. Unfortunately, the only time(s) I have received even a reply to a message or call I initiated was not from anyone who should have been the first response. For the S7 warranty issue it should have been the factory or someone in China.

Yoshi's job is partly to handle US domestic sales. He has helped me and never even mentioned if I bought through him he could give me much better support. I have seen Wolfen state the same, that Yoshi has taken care of him. "...But what about having to pay an extra X percent on top of the miner I already cant gain ROI" -- Well, let's start adding some things up...

Nah, no math, but say it adds $100 per unit? For me today I would be willing to pay an expedite fee to get this hash board fixed. The things needs to be running and sometimes to some people that is more important than the cost. Within reason obviously but I would purchase another miner if I could also have a hash board sent with it, and pay for the board of course. Or, pay a premium for the board, and wait for the RMA process. I'm hearing 5- 6 weeks from china. :/
What would they lose buy having someone answer the phone and sell parts at list price?

Where is the company that is like most other manufacturers, again, for example, I can put a part in a box and have it almost anywhere int he world before the end of the next day. (I do this all the time.) Sure, there are issues sometimes, but I offer to ship to a forwarder on the border if it is an adjoining country like Mexico. The customer can handle it from there. I will help any way possible but in that situation as long as I did the proper paperwork, I fulfilled my responsibility. Sometimes I put things on Southwest, American, etc freight flights. Anywhere they fly I can get a part there many times before UPS or Fedex, and many times it is less expensive. All you need to do is fill out some paperwork and go through some things with the airline.

The people I see here are smart, they are frugal, many are patient, many know what they want and when they want it, everyone is different about what they may pay but today almost every business has a webfront store where you can drop some things in the basket and checkout. Every business has a support line you can call and get some warranty help within an hour or so. Most places including my own are immediate service unless you decide you want to hold for a specific person. Which happens frequently with certain people. Those people care.

Please do not think I am a Bitmain hater. I was, but I stopped being that. I bought my share of S7sand have spent way too many coins on S3 (I love the S3 tanks, above average miner design imo) S4 (I do not like the S4 and bitmain did not make that right with most people who purchased an S4. It was my first very bad experience with bitmain.) S5 (Was the opposite of the S3 mmini tank, the plastic sides warped, hash boards fried, but many people made a lot of money early. I wasn't one of them but I've had my share of S5s through the summer and have 4 left now. Two of which have lost part of the chain, so down about 20% hashrate average on each.
Prelude todl me the S4+ corrected the mistakes with the S4, and that is great. I did not buy one used or new. S4 is a bitch for shipping and some of them can be a real PITA many because of the stock power supply. Why didn't bitmain bite the bullet and start shipping a 1600 watt replacement? Do the right thing. and now the S7.

I learned with the S7 if you have a fan failure you are responsible for sourcing and replacing the fan. You do not see that when you purchase it, or in the warranty, but I was ignored by them repeatedly. Yoshi took care of me, again, I later find out he really only has to help the people who buy from him, and he must have a markup to cover such because he is paying the high prices. I have no doubt he gets a discount for x amount but providing good support is worth something, and part of that "something" is valuable in monetary terms. Bitcoin, USD, or whatever it takes.

The biggest things about these companies who call me int he middle of the night about to send people home because they have ran out of work for them to do, is, usually something simple. Shipping a part, if they work with me, or one of our senior people we can narrow it down, or, ship them enough parts to do so.

It is easy to do. It does cost money. Maybe I am the minority and I am one of the few who see the value in having a straight forward way to even begin the RMA process. A Phone number you can call and receive assistance, somewhere you can order parts 24-7 and select your shipping method with the normal choices for Global / World Ship next day, second day, etc.

Yeah, I think there is a big vacuum for someone to step in and offer average customer service and do very well. I don't believe Spondoolies lost money overall, I think they did very well outside the manufacturing also, they have a good deal of resources and moved to what works for them. (My opinion, by my experience with companies in comparable manufacturing businesses.)
I think a company could step in and start selling a $599.00 S7 equivalent today for two weeks and stop for a week and only sell them for 999.00 or some similar marketing game which would still make them obscene profits but if they offered average customer service and RMA process as most modern companies do then they would quickly own the market. I am saying average company. Don't even talk about a startup full of excited entrepreneurs who would always be on top of things.

There must be a whole different side to Bitmain service and response that I have not been able to experience.
I understand vacation, I've already said my thing there, too many ways to handle people on vacation, everyone who makes something people want on a weekend eventually figures out a way to give it to them.

I have been told by a couple of people here on the forum, and I will summarize, that I was too impatient, and I expect too much for this industry.
I would be ecstatic if I could come here and post raving reviews regarding my experiences with warranty situations and simply purchasing a part or product. That would make me happier. I don't like things about the pool, but I am talking about the mining hardware and how we as a community are consistently buying more.

I hope that after Chinese New Years I am able to talk with someone within the first few days so we can begin the warranty claim and see what they say. I've started tickets through the main bitmain site about the S7. I also used bitmain zendesk per Yoshi.
That is what I should expect when purchasing this product. I should purchase extra miners, some parts from ebay, or just deal with it. There is not an opportunity to purchase factory parts, receive support, or don't even think about trying to process a warranty for a week and a half or so.

Yeah, I know. Which is why again, I think there is a hole to fill and it is too bad I don't see anyone with both the money and the ethics, but hell, maybe we will see some real competition this year. It could get very interesting this fall. Things will tighten up. Rich get richer, and many home miners will be doing better relative to some of those richer. Some of those may not be handling the squeeze quite the way they expect.  

I don't expect a company to put anything above profits. It must make a profit.
Repeat business and offering "after sales" support and product offerings are the biggest money makers. Complete Miners and every part in them should be available to be ordered anytime until X date. IF Bitmain (the manufacturer) ends up with a few extra of something on the shelf they can never sell, they write it off. People and software are smart enough to know what you aren't going to need as many of.  It is also understood there may be backorders.

Have a company able to sell those parts 24-7 for you if you don't have time to take ont he headache of the details. There are plenty of people who can repackage parts and ship them for 10%.










Two of the issues I've found so far dissecting this are so trivial they shouldn't have happened.

Transaction fees go to the pools and the pools decide to pay them to the miners. Anything else, including off-chain solutions are stealing and not the way Bitcoin was intended to function.
Make the block size set by the pool. Pool = miners and they get the choice.
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