Topic: ANTMINER C1 Discussion and Support Thread - page 39. (Read 129130 times)

You'd be amazed at how little flow you really need for most water cooling systems. Although Bitmain chose fairly small hose ports, the blocks are not crazy restrictive (and if they were, it would be a bad design) plus 2 meters of head is pretty good for a small pump. It takes a lot of energy to heat water significantly during the 3-4 seconds it spends in the C1 water blocks before it heads back to the radiator.

Here's a screenshot of the current temps of my C1 and it's not that cold in my basement, approximately 60F (15.5C)



Picture of flow obtained with the little pump

It could be internet related as part of the problem but it wouldn't usually display like that - you'd just get pools with no connection. It very much looks like a hardware issue with the main culprit being power [as you have no modules shown]. PSUs can die at the most random times as well.

The last thing you can try is updating the C1's firmware to the latest version, but I don't think that's your problem, and you'll need a second PSU to test.

Thank you very much for responding.
An Aerocool Strike-X 1100W 90A at +12V; but the PSU cannot be causing any problems, it has to be a network thing because as I said the miner worked perfectly at my home (previous location) during more than 20h and everything was ok. Now I'm trying to make it work from an office at university, I do not need any login to access the internet, I just got a router and connected it to a RJ45 from the wall, internet works nicely, the miner does not.

Any ideas? Is it maybe a ports thing?

Send pictures of it to the email listed.  They might want video depending.   Keep in mind time differences with company in China. If I were you I would send the email and if you don't hear back post here and you will get an answer.  (Include when email was sent, pics, etc).

I hope it goes smoother for you.

My friend that ordered for both of us sent emails to you guys, but said he got no response when sending the email for the RMA. What can we do?

I've run up to 40C, seems fine if you had 3 more slow rpm fans to the rear of the radiator.

Who run the C1 with hot ambient temperatur. If the temperature is hotter than 30C in the room. I want to know if the miner is still stable?

thanks, will do that.

What PSU are you using?

I'm able to connect to the miner again but it's not hashing. Here are the screenshots:

http://s4.postimg.org/7efg8on4t/Config_Adv_C1_Antminer.jpg

http://s4.postimg.org/kjuyesh0d/Config_Gen_C1_Antminer.jpg

http://s4.postimg.org/9yfogj02l/Net_Set_C1_Antminer.jpg

http://s9.postimg.org/yxowbbtvz/Status_C1_Antminer.jpg

From the specs that one is rated around 1/2 of volume pushed.   I would guess it's partially based on ambient temperature.  If OP has very cold ambient it will cool the coolant when in the tube, not just in the radiator.

Personally I would not go this route but I know a few through this thread have.  You would use anything that holds water and is big enough to put it in as a reservoir.  Reservoir's are not really anything special.

Those are water fountain / fish tank pumps which do work, but have half the pushing power and height as the C1 rated pump. They also have no reservoir, unless you have that pump sitting inside a small bucket of coolant or something?

I wonder if anyone has tried cooking an Antminer board.  I'm not sure if it was on this C1 thread or the S3 thread but someone posted a photo of an IC blown off the board along side a missing capacitor.  (Had been on the S3 thread but photos removed by poster.)  Where the IC was gone you can see the underside ground plane having a grid of thru holes to the ground plane of the other side of the PCB.  A common cause of IC failure is when that ground plane under the IC isn't soldered sufficiently and a small gap exists.  Cooking a PCB in an oven reflows the solder and often repairs that ground plane soldering.  On the other hand some ASICs just perform less well than others, e.g. not having a full complement of functioning engines which wouldn't be helped at all by cooking the PCB.  BFL was notorious for vetting the ASICs and routing products containing poorly performing ASICs to customers who didn't pay a surcharge.  If you didn't pay the surcharge you'd likely get a miner that ran almost 10% under specs.  Cooking wouldn't help those.

Did you change netmask, gateway, and dns to proper entries? (You can use ipconfig on PC to get what to put in them)

To get it back if you cannot get to it now you can use SD image in 2nd post.  It is very easy to fix this by doing that.  

I don't think the cause of the power creep has ever been confirmed, but it may be to do with misbehaving chips (which also cause the hashrate drop). Hard shutdowns are much preferred to fix chip problems, as as you experienced a soft reset just tends to drop the entire board out.

Currently you won't find the C1 anywhere as its not got a static IP entered. First step is trying the reset button until you see ethernet flashing (and then it will go back to 192.168.1.99). If that doesn't work, open the case and the SD card. Download SD card imager and use it to flash the backup SD card image I put up in post #2.

Once you're back and able to connect, please post screenshots of the configuration and status pages and we'll get you sorted out. DHCP is much preferred as it eliminates a whole set of potential problems.

One EK pump would do 2x C1s easily, potentially more if you want. I still feel the cheapest method is RMA via syscooling as you can purchase additional spare fans for next to nothing compared to local pumps. You could probably get 5 spare pumps for half the price of an EK.

Regarding the reset button, what worked on an S3 was to shut it down 60 seconds, fire up while mashing the reset REPEATEDLY and quickly for about 30 seconds then a long hold down then release.

Hello all, I've been following this thread since page 40 and I need your help.

    I bought an Antminer C1 a couple of weeks ago and after changing it to a new location and internet I'm still trying to access it through 192.168.1.99. I had already set it to DHCP at my previous location and it worked fine; it mined for about 20hours.
Here at the new location at first I could see that my router had assigned 192.168.1.101 to the Antminer so I was able to access it through that direction but it wouldn't mine; so I changed it to Static (without writing ANYTHING, no numbers at all on the spaces below "Static") and clicked "Save and Apply" in order to change it again to DHCP afterwards hoping that it would reset the connection of DHCP and star mining.

    After that I've been unable to find it using 192.168.1.99 nor 192.168.1.101 (previously assigned) and I have even tried 192.168.1.199 but nothing works. I downloaded a program to scan every device on the net and see its direction but the Antminer does not appear listed. I've also tried to connect to the miner directly with an ethernet cable to my PC but it can't find anything at 192.168.1.99. (even changing the 192.168.1.1 thing on control panel and the properties blabla) I've tried to reset it using the button on top of the ethernet connection but it seems NOT to work, I've tried many times with 3s, 5s, 10s, even 90seconds and nothing, it does not even produce a sound or change of light.

What can I do to connect to my miner?? I would greatly appreciate any help you could provide me, thank you very much in advance.

There is a video someone posted earlier from syscooling.  You might try it and see if cleaning around the motor helps.  If you have one of the early pumps that was dry tested, it's possible it's plastic rubbing.   

I would try it on one to see if it helps.  I don't want you to do both and go through trouble on both if you get no results from it.