My batch 2 S2 has been hashing at around 1 TH/s since I got it a month ago.
However, in the last two days the hash rate has fallen to an average of 900 GH/s.
You would think a blade had failed, but I don't think so because sometimes it still hits 1 TH/s. The chart on the pool shows it hovering mostly around 900 GH/s.
Has anyone else had this issue?
Topic: ANTMINER S2 Discussion and Support Thread - page 91. (Read 355730 times)
Some antminer S2 batch 4 unboxing photos http://imgur.com/a/j4pkf
Its been hashing away non stop since I received it.
Its been hashing away non stop since I received it.
I still have
10 S1 coupons 0.05 BTC, asking 0.0075 BTC each
8 S2 coupons 400$, asking 0.045 BTC each
Account as Bitmaintech: pvnamk19, pm please
10 S1 coupons 0.05 BTC, asking 0.0075 BTC each
8 S2 coupons 400$, asking 0.045 BTC each
Account as Bitmaintech: pvnamk19, pm please
This is an ongoing issue with Bitmain in general. I too was just hit with a failed part, and the turn around on failed product WILL result in serious loss in mining payouts. There is an advantage to going with Bitmain for mining hardware, however due to their support on hardware with issues, you need to factor in as serious losses in revenue .
Yeah I've accepted that I will probably never reach ROI, and its very frustrating/depressing watching your investment go from bad to worse.
Bad to worse => to worser....
Got the blue screen of death.... S2 turns on but only getting a blank blue LCD display on the S2. I've re-imaged SD card but did nothing. Waiting for a Bitmain to reply for a RMA request.
Don't give up yet. i've had the same thing. try removing all the boards (power off first, of course), then power on. watch the controller board for blue lights. they mean the controller has found a usable boot partition on the SD card and booted from it. if you get it to boot, and can connect to the web page of the controller, then the problem may have been a connection to one of the currently-removed boards. you have to put them back in, but there's a good chance that shutting the system off "hot" will botch the SD image, so you have to ssh into it and shut it down gracefully...
shutdown -h now
wait for it to do so, then power off.
keep us posted.
Wow cheers, I managed to get it going again with your advice. I guess I had to be a little more persistent. Since I've turned it back on I've got a whole lot of --x--x---- on 2 of the blades. So I only have 7 functioning 100%, 2 @ about 70% and 1 not 0%.
I'm still waiting for a reply from Bitmain for a support query last week on the reason why a blade is running much cooler and literally not hashing.
I've tried rebooting machine to clear the ---x--- but they dont seem to clear.
Is there a default login and password to SSH into the machine?.. I'm using putty.
Well managed to get going for about 5 days however after 2 days one of the blades malfunctioned again, I don't why but the only evidence shows that the blade cools down and stops hashing. I guess it shows when the avg hash starts dropping. This was my original problem other than the rest of the problems I am experiencing. Today I had to relocate the machine which required me to switch off, unfortunately every time I have to switch off I have to image the SD card and spend about 10min pushing it in and out waiting for the device to get read card and get the machine going again. Definitely not a user friendly nor a reliable device. Really this machine should go back to Bitmain but the opportunity cost of sending it back for replacement is losing at least 2 week hashing time when they decide to pull finger and something about it.
Yeah it just took me 3 hours to start it back up again, and when i did a different blade has a lot xxxxx of in the ASIC status... Forever plagued with problems.
Hi,
Looking for 1x S1 coupons, send a 2x S2 coupon. my id spodo
Thanks
Looking for 1x S1 coupons, send a 2x S2 coupon. my id spodo
Thanks
i am out of coupons 
Gave them all away
Gave them all away 
I sell S2 coupons for 0.05BTC each.
I have more than 30 coupons currently.
Pm me for anyone interested.
I have more than 30 coupons currently.
Pm me for anyone interested.
Just a short Hallo to All,
Thanks for all the Information!
I' don't have much time at the moment. So for (nearly) all that need S2 Coupons: I have 2 X S2 Coupons vallid until 23/5/14 and 4 X S2 Coupons valid until 30/05/14 to give away!
Donations are Welcome: 35kKxtF1fKq2vB2R3aEKJE25bwzsz4RPev
The half of the Donation will be Donated back to this Forum!
Send me a PM with your Bitmain-Account-Name, and if i have the feeling that you doing all of this not just for profit i send you max. 2! ... let's decentralize the Network as far as possible at this Point!
Until later ... time for Holidays know ; )
Update only 4/5 Coupons for 30/05/14 left
Thanks for all the Information!
I' don't have much time at the moment. So for (nearly) all that need S2 Coupons: I have 2 X S2 Coupons vallid until 23/5/14 and 4 X S2 Coupons valid until 30/05/14 to give away!
Donations are Welcome: 35kKxtF1fKq2vB2R3aEKJE25bwzsz4RPev
The half of the Donation will be Donated back to this Forum!
Send me a PM with your Bitmain-Account-Name, and if i have the feeling that you doing all of this not just for profit i send you max. 2! ... let's decentralize the Network as far as possible at this Point!
Until later ... time for Holidays know ; )
Update only 4/5 Coupons for 30/05/14 left
Personally I wouldn't call a doubling of the hashpower an extreme case, it's the upper bound of the suggestion made by Bitmain. My expectation is a node size shrink and cheap upgrade cards that use the existing backplane and heat sinks.
It is an extreme case because of the thermal constraints and power supply requirements of the OC'd package.
Your expectations are likely to be disappointed because a node shrink and a complete set of new cards will not constitute a 'very low cost' upgrade.
OC'ing the S2 is a poor idea IMO, it makes much more sense to just go buy S1s which are cheaper and better suited to handle the added power consumption in both cooling and dc/dc power regulation.
OC'ing the S2 (within the limits imposed by the need for operability in a home or small office environment) is a great idea, just like it was for the S1.
With a 1.4 - 1.8TH machine IN STOCK with 2 day delivery for $1600 - $1900 retail right now Bitmain would have this market all stitched up.
Hello. I have AntMiner S2 Coupon 400 USD - 29 pcs. Maybe someone needs? I can sell.
Lets analyse it a bit more:
-"upgrade to 1.8TH/s or 2TH/s at very low cost "
I believe is more like a hardware upgrade, rather than a coupon.
A short good news for the S2 buyer is that we will let the S2 to upgrade to 1.8TH/s or 2TH/s at very low cost which you can only image now in the August or September. It still depends on many factors to let us achieve that and detailed plan needs to be drafted, But we are very confident that we can make it.
-"upgrade to 1.8TH/s or 2TH/s at very low cost "
I believe is more like a hardware upgrade, rather than a coupon.
Well they better start moving faster as diff will ne 10.4b next week.
But then again no one else has a better $ per gh solution either.
Hasratio is cheaper , but their machines are huge 8T.
$1.3/ghs for 1.2w/ghs machines.
Nothing on LCD?
nothing on LCD after reboot fail with C10 - 8GB SDcard
swapping back brought everything back to 'normal'
rebooting the wifi brought it back online.
everytime i think i'll go for just 1 more - they start beeping at me as if to say 'dont do it'
then when i get to the point of giving them a swift boot, they jump back in line...
Sounds like an IP collision to me if restarting the router fixed it (temporarily). Try setting a different Static IP.
Lets analyse it a bit more:
-"upgrade to 1.8TH/s or 2TH/s at very low cost "
I believe is more like a hardware upgrade, rather than a coupon.
A short good news for the S2 buyer is that we will let the S2 to upgrade to 1.8TH/s or 2TH/s at very low cost which you can only image now in the August or September. It still depends on many factors to let us achieve that and detailed plan needs to be drafted, But we are very confident that we can make it.
-"upgrade to 1.8TH/s or 2TH/s at very low cost "
I believe is more like a hardware upgrade, rather than a coupon.
Well they better start moving faster as diff will ne 10.4b next week.
But then again no one else has a better $ per gh solution either.
Nothing on LCD?
nothing on LCD after reboot fail with C10 - 8GB SDcard
swapping back brought everything back to 'normal'
rebooting the wifi brought it back online.
everytime i think i'll go for just 1 more - they start beeping at me as if to say 'dont do it'
then when i get to the point of giving them a swift boot, they jump back in line...
Lets analyse it a bit more:
-"upgrade to 1.8TH/s or 2TH/s at very low cost "
I believe is more like a hardware upgrade, rather than a coupon.
A short good news for the S2 buyer is that we will let the S2 to upgrade to 1.8TH/s or 2TH/s at very low cost which you can only image now in the August or September. It still depends on many factors to let us achieve that and detailed plan needs to be drafted, But we are very confident that we can make it.
-"upgrade to 1.8TH/s or 2TH/s at very low cost "
I believe is more like a hardware upgrade, rather than a coupon.
I wonder what they are planning for the S2 upgrade they said.
Probably an OC to 2TH. After all these chips are only running at 196 ...
OC to 2TH is pretty impossible to do, i think that they are planning to sell discounted hw to all the ppl that have already bought s2.
Have you tried switching sd cards from your other rigs?
Nothing on LCD?
Well, for starters a 2TH S2 probably wouldn't generate 2.6 kW of heat, more likely ~2KW (I haven't done an analysis), but how about modifying an old fridge with some power sockets on the back wall ? That should satisfy the 'house friendly' crowd and the 'there is no way' crowd at the same time LOL
I don't believe the average fridge is designed for the duty cycle required to continually cool bitcoin mining hardware.
Quote
In any case, doubling the hashpower is an extreme case … it would be nice to get an extra 40% out of a machine which costs less than $2000 retail and whose price in a group buy is significantly less. The ideal scenario would be to OC it to the point where it could still run on a 15-20amp 120v circuit. Think an SP10 level machine without all the noise for ~$1600 ...
Personally I wouldn't call a doubling of the hashpower an extreme case, it's the upper bound of the suggestion made by Bitmain. My expectation is a node size shrink and cheap upgrade cards that use the existing backplane and heat sinks.
OC'ing the S2 is a poor idea IMO, it makes much more sense to just go buy S1s which are cheaper and better suited to handle the added power consumption in both cooling and dc/dc power regulation.
And the old cards, throw away?
Well, for starters a 2TH S2 probably wouldn't generate 2.6 kW of heat, more likely ~2KW (I haven't done an analysis), but how about modifying an old fridge with some power sockets on the back wall ? That should satisfy the 'house friendly' crowd and the 'there is no way' crowd at the same time LOL
I don't believe the average fridge is designed for the duty cycle required to continually cool bitcoin mining hardware.
Quote
In any case, doubling the hashpower is an extreme case … it would be nice to get an extra 40% out of a machine which costs less than $2000 retail and whose price in a group buy is significantly less. The ideal scenario would be to OC it to the point where it could still run on a 15-20amp 120v circuit. Think an SP10 level machine without all the noise for ~$1600 ...
Personally I wouldn't call a doubling of the hashpower an extreme case, it's the upper bound of the suggestion made by Bitmain. My expectation is a node size shrink and cheap upgrade cards that use the existing backplane and heat sinks.
OC'ing the S2 is a poor idea IMO, it makes much more sense to just go buy S1s which are cheaper and better suited to handle the added power consumption in both cooling and dc/dc power regulation.
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