ANTMINER U3 Discussion and Support Thread

[dogie]

I have exhausted the list of potential causes I believe, we need to come up with a new cause.

You can also try them on a different computer, there are a lot of variables included in each computer which aren't easy to identify externally.

[diverino]

I have a similar erro, with a Raspberry Pi with Minera 0.4.1 and a Antimer U3 with the original PSU.

The error say:

[2015-03-15 22:15:50] Accepted 0ea14cda Diff 4.48K/256 AU3 0 pool 2
 [2015-03-15 22:16:27] Accepted 90b4ee50 Diff 453/256 AU3 0 pool 2
 [2015-03-15 22:16:42] AU3 0: No valid hashes for over 1 secs, attempting to reset
 [2015-03-15 22:16:42] AU3 0 attempted reset got err:(0) LIBUSB_SUCCESS
 [2015-03-15 22:16:49] AU3 0: No valid hashes for over 1 secs, attempting to reset
 [2015-03-15 22:16:49] AU3 0 attempted reset got err:(0) LIBUSB_SUCCESS
 [2015-03-15 22:16:58] AU3 0: No valid hashes for over 1 secs, attempting to reset
 [2015-03-15 22:16:58] AU3 0 attempted reset got err:(0) LIBUSB_SUCCESS
 [2015-03-15 22:16:59] AU3 0 SendWork usb write err:(-9) LIBUSB_ERROR_PIPE
 [2015-03-15 22:16:59] AU3 0 attempted reset got err:(-5) LIBUSB_ERROR_NOT_FOUND
 [2015-03-15 22:16:59] AU3 0: Comms error (werr=-5 amt=32)
 [2015-03-15 22:16:59] AU3 0 failure, disabling!
 [2015-03-15 22:17:13] Hotplug: Icarus added AU3 1
 [2015-03-15 22:17:24] Accepted 56d7767f Diff 755/256 AU3 1 pool 2
 [2015-03-15 22:17:47] Accepted 97bdd8d7 Diff 432/256

  My provisonal solution is unplug and plug the USB conector of Antminer.

I need help !!

[MyRig]

does unplug the USB cable and plug back in work?

or can you try with a windows computer or a linux based computer or other Rpi?

[Mikestang]

I have exhausted the list of potential causes I believe, we need to come up with a new cause.

You can also try them on a different computer, there are a lot of variables included in each computer which aren't easy to identify externally.

Yes, I have a lap top here as well, and have mirrored everything on it with the same non-results.  I do not know what else to try.

[MyRig]

It could be a defective one.  Please check with the seller for the warranty period.  Is it a wire cage looking version or the metal case?

[Mikestang]

It could be a defective one.  Please check with the seller for the warranty period.  Is it a wire cage looking version or the metal case?

Please use quotes so we know who you are talking to.  If you were talking to me, none of mine are defective, they all work perfectly when solo.  It's only if you plug more than one into the same computer that they stop working.

[Phosphorous]

If you have two AntMiner U3's where they both work fine on their own, I cannot imagine how thermal management would have anything to do with them not working fine when both are plugged in - unless both were put into an enclosed box together significantly raising each other's temps.  Given the thermal mass involved, even that scenario seems unlikely to throw errors practically immediately.

It's not a "thermal management" issue. There are dielectric effects of having excess paste covering CCA components that should not be covered. I didn't believe it either but the results are real.

[Mikestang]

If you have two AntMiner U3's where they both work fine on their own, I cannot imagine how thermal management would have anything to do with them not working fine when both are plugged in - unless both were put into an enclosed box together significantly raising each other's temps.  Given the thermal mass involved, even that scenario seems unlikely to throw errors practically immediately.

It's not a "thermal management" issue. There are dielectric effects of having excess paste covering CCA components that should not be covered. I didn't believe it either but the results are real.

What results do you speak of?  Did you have more than one U3 that wouldn't run together, then you cleaned up the paste, then they ran together just fine?  If they work just fine by themselves, how could excess thermal paste cause any issue when they're running together?   There are a few people who posted that they were able to run more than one U3 at a time, that was right after ck updated cgminer.  Maybe I need to try an older 4.8.x version?  Or maybe it's just my computers don't agree with more than one U3?  I don't know why it would work for some, but not for me.

[Phosphorous]

If you have two AntMiner U3's where they both work fine on their own, I cannot imagine how thermal management would have anything to do with them not working fine when both are plugged in - unless both were put into an enclosed box together significantly raising each other's temps.  Given the thermal mass involved, even that scenario seems unlikely to throw errors practically immediately.

It's not a "thermal management" issue. There are dielectric effects of having excess paste covering CCA components that should not be covered. I didn't believe it either but the results are real.

What results do you speak of?  Did you have more than one U3 that wouldn't run together, then you cleaned up the paste, then they ran together just fine?  I have not seen any evidence of this in this thread.  In fact, I haven't even seen evidence of more than one U3 running together on the same machine without issue.

You haven't read my posts then. I had 3 units at one time and none of them ran together. After cleaning up the paste performance improved but I still had problems. I've since sold 1 unit, but since replacing the USB cable I successfully run 2 U3's and 1 Rockminer R-Box together. Every 4 days or so I do have to cycle power on the U3's and unplug/replug the USBs, but that is acceptable to me.

[Mikestang]

You haven't read my posts then. I had 3 units at one time and none of them ran together. After cleaning up the paste performance improved but I still had problems. I've since sold 1 unit, but since replacing the USB cable I successfully run 2 U3's and 1 Rockminer R-Box together. Every 4 days or so I do have to cycle power on the U3's and unplug/replug the USBs, but that is acceptable to me.

Just edited my post as I read through this thread again, searching for answers.  If I understand you, you had 3 and they wouldn't run together, you cleaned up thermal paste, and then they ran together?  You say "performance improved", but what does that mean exactly?  If the only change you made to get them to run together was cleaning thermal paste I'll give it a shot.

What happens every 4 days that you need to cycle them?  Performance drops?  Errors?  Zombie?

[Phosphorous]

You haven't read my posts then. I had 3 units at one time and none of them ran together. After cleaning up the paste performance improved but I still had problems. I've since sold 1 unit, but since replacing the USB cable I successfully run 2 U3's and 1 Rockminer R-Box together. Every 4 days or so I do have to cycle power on the U3's and unplug/replug the USBs, but that is acceptable to me.

Just edited my post as I read through this thread again, searching for answers.  If I understand you, you had 3 and they wouldn't run together, you cleaned up thermal paste, and then they ran together?  You say "performance improved", but what does that mean exactly?  If the only change you made to get them to run together was cleaning thermal paste I'll give it a shot.

What happens every 4 days that you need to cycle them?  Performance drops?  Errors?  Zombie?

Performance undeniably improved after cleaning the thermal paste. By this I mean the units lasted longer but still Zombie'd. Replacing the USB cables then let me get to where I am at today. It might be worth just changing the USB cables without doing the paste to see if that would have been enough as cleaning the paste is a pain and is not for everyone.
I never got 3 to run together because I sold one before I got the new USB cables.
Now after running for a few days one of the units will Zombie. Unplugging/replugging gets it to work again but only for a short while. Cycling power and USB plug/replug gets it to work for another 4 days or so.
Hope this helps.

[Mikestang]

Performance undeniably improved after cleaning the thermal paste. By this I mean the units lasted longer but still Zombie'd. Replacing the USB cables then let me get to where I am at today. It might be worth just changing the USB cables without doing the paste to see if that would have been enough as cleaning the paste is a pain and is not for everyone.
I never got 3 to run together because I sold one before I got the new USB cables.
Now after running for a few days one of the units will Zombie. Unplugging/replugging gets it to work again but only for a short while. Cycling power and USB plug/replug gets it to work for another 4 days or so.
Hope this helps.

I have used my own USB cables since day 1, my first U3 would not run at all with the factory cable.  My second U3 I threw the factory USB cable in the trash right away.

Were you able to run two U3s together before you cleaned the thermal paste is I guess what I'm getting at.  I haven't applied paste since I build my computer years ago, I know it's a pain, which is why I'm putting it off, but I just may have to try it to say I've tried everything.

Other than that maybe my computers have USB issues, I read through this thread again and noted at least 5 different people who were able to run 2 at once.  I wonder why it works for them but not for me.

[Phosphorous]

Performance undeniably improved after cleaning the thermal paste. By this I mean the units lasted longer but still Zombie'd. Replacing the USB cables then let me get to where I am at today. It might be worth just changing the USB cables without doing the paste to see if that would have been enough as cleaning the paste is a pain and is not for everyone.
I never got 3 to run together because I sold one before I got the new USB cables.
Now after running for a few days one of the units will Zombie. Unplugging/replugging gets it to work again but only for a short while. Cycling power and USB plug/replug gets it to work for another 4 days or so.
Hope this helps.

I have used my own USB cables since day 1, my first U3 would not run at all with the factory cable.  My second U3 I threw the factory USB cable in the trash right away.

Were you able to run two U3s together before you cleaned the thermal paste is I guess what I'm getting at.  I haven't applied paste since I build my computer years ago, I know it's a pain, which is why I'm putting it off, but I just may have to try it to say I've tried everything.

Other than that maybe my computers have USB issues, I read through this thread again and noted at least 5 different people who were able to run 2 at once.  I wonder why it works for them but not for me.

No, I was unable to run multiple units for more than a few minutes before cleaning the paste.

[Helfred]

My power supply burned out.

Can somebody give me a hint, where to buy a replacement (ebay?) ?

Thank you all.

郭明捷

[Mikestang]

My power supply burned out.

Can somebody give me a hint, where to buy a replacement (ebay?) ?

Thank you all.

郭明捷

I have 3 factory U3 power supplies I'm not using, I will sell you one if you would like.  PM me if interested.

[Visvas]

You should really buy something else than the supplies provided with the units from Bitmain... The factory supplies gets worringly hot and my U3 on a new and better supply is more stable.
(Sorry mikestang;)

[Mikestang]

No problem, you're right, he should power them off a real psu, but if he doesn't want to do that I have factory U3 power supplies and I'll let them go for cheap!

[Blackbird0]

You should really buy something else than the supplies provided with the units from Bitmain... The factory supplies gets worringly hot and my U3 on a new and better supply is more stable.
(Sorry mikestang;)

What PSU would you recommend? I'm only getting ~48 GH/S with defaults. And that's with a good USB cable to a powered hub.

[Mikestang]

You should really buy something else than the supplies provided with the units from Bitmain... The factory supplies gets worringly hot and my U3 on a new and better supply is more stable.
(Sorry mikestang;)

What PSU would you recommend? I'm only getting ~48 GH/S with defaults. And that's with a good USB cable to a powered hub.

Get a 4-pin molex to barrel plug connector and use your computer's psu, or if you have any other miners using atx psu tap into that.  The U3 needs about 1 watt/gh.

[Mikestang]

Performance undeniably improved after cleaning the thermal paste. By this I mean the units lasted longer but still Zombie'd. Replacing the USB cables then let me get to where I am at today. It might be worth just changing the USB cables without doing the paste to see if that would have been enough as cleaning the paste is a pain and is not for everyone.
I never got 3 to run together because I sold one before I got the new USB cables.
Now after running for a few days one of the units will Zombie. Unplugging/replugging gets it to work again but only for a short while. Cycling power and USB plug/replug gets it to work for another 4 days or so.
Hope this helps.

I have used my own USB cables since day 1, my first U3 would not run at all with the factory cable.  My second U3 I threw the factory USB cable in the trash right away.

Were you able to run two U3s together before you cleaned the thermal paste is I guess what I'm getting at.  I haven't applied paste since I build my computer years ago, I know it's a pain, which is why I'm putting it off, but I just may have to try it to say I've tried everything.

Other than that maybe my computers have USB issues, I read through this thread again and noted at least 5 different people who were able to run 2 at once.  I wonder why it works for them but not for me.

The other weird thing is that I can run four nanofury usb stick miners at the same time with one U3 just fine, so the conflict is definitely something U3 to U3.  I'll clean up the paste anyway, because they'll run cooler with a proper application.