ANTMINER C1 Discussion and Support Thread

[notlist3d]

Agreed to new water cooled miner, I use C1 for heating during winter. I did last winter without any additional heat source and it was perfect. Just give us S7 with few waterblocks on it, we will take care of the rest

It will take someone to mod most likely.  I just don't see another C series for the many reasons I have posted earlier.

You can look at their partner syscooling on C1, and S5 mod.  They have not logged in for months.   So that does not sound very promising.

Apparently, this  forum was for them too stressful.

I still have 3 x C1 working pump for 8 (Two of them were replacements pumps)
that working  with S5 and C1 cooling radiators .


But Syscooling answer e-mails and still sells an their website.
A few days ago, I bought a third cooling kit for 2x S5
http://shop.syscooling.com/goods.php?id=46

If you had a RMA email was "stressful" to.   I still remember a RMA pump in the mail for a month on one and over a month on my second pump, both died within 2 days.

They were a huge pain on batch one after they dry tested water pumps and shipped them out.  And that horrible V1 fan harness.  I had a horrible time with them.  It is back who know how many pages.  But I did not feel sad when them and bitmain split as far as joint ventures.

If Bitmain does do a water cooling again (which I dount).  I hope they keep it in house they could have beat syscooling but that is not saying much.  And I realize not all had as bad as I did.

[Didldak]

Anyway, I regred so much that I didnt install floor heating tubes in my "main" room. It would be so cool run warm coolant from C1 thru them

[dunand]

I have a C1 that is broken. I cannot ssh it and the fan is always running full speed. I want to try to reflash the sd card. Does anyone have an image I can use ?

Edit: I will try the image from the Dogie support page https://bitcointalk.org/index.php?topic=841344.msg9389747#msg9389747

[notlist3d]

I have a C1 that is broken. I cannot ssh it and the fan is always running full speed. I want to try to reflash the sd card. Does anyone have an image I can use ?

Edit: I will try the image from the Dogie support page https://bitcointalk.org/index.php?topic=841344.msg9389747#msg9389747

It sounds like it is mining i fans running at full speed.  Have you looked at pool during the times it does this?

And dogies image should do the trick if it's software.  That is the nice thing about SD card using miners as they are easy to reset to factory.

[pinhead666]

I have a C1 that is broken. I cannot ssh it and the fan is always running full speed. I want to try to reflash the sd card. Does anyone have an image I can use ?

Edit: I will try the image from the Dogie support page https://bitcointalk.org/index.php?topic=841344.msg9389747#msg9389747

It sounds like it is mining i fans running at full speed.  Have you looked at pool during the times it does this?

And dogies image should do the trick if it's software.  That is the nice thing about SD card using miners as they are easy to reset to factory.

Or if the fans run at full speed as soon as power is connected,then controller is not powered at all or is completely dead.

[soy]

I have a C1 that is broken. I cannot ssh it and the fan is always running full speed. I want to try to reflash the sd card. Does anyone have an image I can use ?

Edit: I will try the image from the Dogie support page https://bitcointalk.org/index.php?topic=841344.msg9389747#msg9389747

I just fixed a similar problem.  The power was momentarily interrupted and restored to the C1.  The controller card stopped communicating.  I downloaded the stock image.  Putting the SD card into a reader on a Win7 machine.  The machine asked to scan and repair the card.  I said no.  Using the HDD Raw Copy Tool, I started to write stock image to the card.  It hung very quickly.  I shut down the process and ejected the card then reattached the card reader.  This time when Windows asked to scan and repair errors I said yes.  When I ran the HDD Raw Copy Tool it wrote the stock image to the card 100% no problem.  Then of course I had to reconfigure the card which woke up at 192.168.1.99.  Afterwards I wondered if I had run the scan and repair then put the card directly back in the machine if it would have worked with all the original settings.

[soy]

This C1 has a higher temperature on chain 3.  I use separate supplies on each card.  I've lost two supplies on this machine, this card, so obviously one or more of the ASICs on the card is drawing higher current.  About 10 minutes ago I disconnected power to the supply on the card that blows supplies and the temperature on chain 3 came down and of course the hashrate dropped by 25%.  Curiously, ASIC status shows all to be o's, even the chain with power disconnected!

-----------------

Interesting, here it is sometime later, I changed my miner config for a misspelling in a pool, now chains 2,3, and 4 are alive while 1 shows dashes.  The hot chain was #3, was disconnected, is now chain 1.

[Didldak]

The C1 is best anyway...


http://imgur.com/tszo8AI

[dunand]

The C1 is best anyway...

http://imgur.com/tszo8AI

Nice setup. Is your radiator in aluminium?

[mavericklm]

The C1 is best anyway...


http://imgur.com/tszo8AI

same shit that i want to do! just put it in like another radiator in the heating loop!

[Didldak]

it is not, it's made of steel. I have been told that steel and alu does not react, but I have ordered the anti-corosion stuff anyway.

But I have to say it is pretty great, the heat seems to be even in whole room and it's really silent. On the side note, I have aftermarket pump and I am not sure if it will hold for whole winter, it seems it's got a hard time pumping the large amount of water :| I was thinking about drilling holes into another room (hallway), make tubes go there and buy a little stronger pump (20-30w). That way it will be completely silent in my room + less messy look + i wont have to stress about pump dying.

[Captain-Karacho]

Hey Guys,

one of my 3 C1s is not functioning normally anymore.
It started about one week ago, when I noticed that the fan of this particular miner was running at full speed and I was not able to access it via the web interface. Shutting the device on and off resulted in the same issue: fan starts and continues to run at full speed, no accees to the device.
Since also the hard-reset did not work, I took out the SD-Card and flashed the Stock Rom from dogie. After inserting the SD-Card back into the C1, I was again able to access it and everything looked normal. I then flashed the most recent firmware from Bitmain and started mining at 250Mhz/ 0.760.  

However after a few minutes, the temperatures of Chain 4 first started dropping and then increasing to up to 125°C, with the fan running at full speed, causing the C1 to stop mining. Guess the temperature reading is not correct since the heatsinks (I currently am operating the device without the case) don't feel hot at all. After shutting off the miner, waiting for a few minutes and then turning it on again it starts hashing again for a while  before the whole issue starts over again.
After doing a software reboot while the fans are running at full speed, I noticed that Chain 4 only shows 15 instead of 16 ASICS. Still fans continue to run at full speed and no hashing. Furthermore the Load Average is far smaller than the one from my two other C1s.

In short:
Hashing --> Temperature of Chain 4 drops --> Temperature of Chain 4 increases --> Fan starts running at full speed --> Miner stops mining (and the status light starts blinking red)


What I have tried so far:
- flashing the bitmain firmware (dec 14) again
- trying different frequencies and voltages
- adding PCI-E cables to make sure it's not the PSU
- connecting the radiator and the fans to another Chain
- trying to start the miner without Chain 4 by disconnecting the cables (but it won't start)

Did anyone here experience something similar before? Any idea how to solve this problem?

One more thing: can I pull out the PCI-E (6-Pin) cable connected to Chain 4 while the Miner is runnning or do I risk damaging the hardware doing that?


https://i.imgur.com/Vs62L3j.jpg 10m

https://i.imgur.com/5jqn6gn.jpg 20m

https://i.imgur.com/xtNVWvt.jpg 40m

https://i.imgur.com/AgEiYnM.jpg Load

Every help greatly appreciated

[notlist3d]

One more thing: can I pull out the PCI-E (6-Pin) cable connected to Chain 4 while the Miner is runnning or do I risk damaging the hardware doing that?

When running I would no be messing with PCIe cables plugging in or out.   I would do this with PSU off, as i you do when running your are unplugging and plugging in a live cable... so not the best idea.

The C1 is a little trouble to troubleshoot with the water it add's kinda a pain.   What I tried on mine was repasting, I just did not have the time.  But I sold as parts and I think after it was repasted 3 out of 4 blades worked.  This is kinda last resort though I would try everything else before looking under and doing this.  But if you do I suggest looking at amazon you can buy a small tub vs the standard syringe, and get much more paste.

[zOU]

oh god I just discovered that today... and now I can not think about anything else....

a watercooled miner.... my 2 crazy hobbies :p

Now let's try to find one and.... figure out how to pay for it

[talks_cheep]

Hey Guys,

one of my 3 C1s is not functioning normally anymore.
It started about one week ago, when I noticed that the fan of this particular miner was running at full speed and I was not able to access it via the web interface. Shutting the device on and off resulted in the same issue: fan starts and continues to run at full speed, no accees to the device.
Since also the hard-reset did not work, I took out the SD-Card and flashed the Stock Rom from dogie. After inserting the SD-Card back into the C1, I was again able to access it and everything looked normal. I then flashed the most recent firmware from Bitmain and started mining at 250Mhz/ 0.760.  

However after a few minutes, the temperatures of Chain 4 first started dropping and then increasing to up to 125°C, with the fan running at full speed, causing the C1 to stop mining. Guess the temperature reading is not correct since the heatsinks (I currently am operating the device without the case) don't feel hot at all. After shutting off the miner, waiting for a few minutes and then turning it on again it starts hashing again for a while  before the whole issue starts over again.
After doing a software reboot while the fans are running at full speed, I noticed that Chain 4 only shows 15 instead of 16 ASICS. Still fans continue to run at full speed and no hashing. Furthermore the Load Average is far smaller than the one from my two other C1s.

In short:
Hashing --> Temperature of Chain 4 drops --> Temperature of Chain 4 increases --> Fan starts running at full speed --> Miner stops mining (and the status light starts blinking red)


What I have tried so far:
- flashing the bitmain firmware (dec 14) again
- trying different frequencies and voltages
- adding PCI-E cables to make sure it's not the PSU
- connecting the radiator and the fans to another Chain
- trying to start the miner without Chain 4 by disconnecting the cables (but it won't start)

Did anyone here experience something similar before? Any idea how to solve this problem?

One more thing: can I pull out the PCI-E (6-Pin) cable connected to Chain 4 while the Miner is runnning or do I risk damaging the hardware doing that?


10m

20m

40m

Load

Every help greatly appreciated

I think you've running your C1 at too high a voltage & frequency, 250@0.076 is in my view a tad too high. Certainly, other people have run their C1's at that speed with no permanent damage, but other C1's have suffered damage, BMT's quality control sucks egss, you know. I found my C1 runs cooler and more reliably at 200@0.070, it hashes at 800 GHs, not a problem since I'd like mine to last a while longer.

[zOU]

well the screenshot show freq@150...

[notlist3d]

If you are using a C1 you should make a backup of your SD card when it's working.  That's what I did and if anything went wrong you can just flash the SD card with old firmware and it was easy.

That would be my advice on it if you have a backup try it.   And if you don't make a backup and see what a new FW does.  It helps rule out software and with C1 the SD option is great in case of bricks.

[zOU]

Do you think that 300£ without cooling and PSU is a fair price ?

[mavericklm]

Do you think that 300£ without cooling and PSU is a fair price ?

For an c1? You joking right?
I sold an c2 for ~335gbp and i paid the shipping!

[zOU]

OK, i'm looking for one so obviously this one is too expensive ?

I bought 2 S3+ from this seller without PSU for under 250£