ANTMINER U3 Discussion and Support Thread

[Mikestang]

Try using v4.9.2, it is the most current release. 4.9.1 had problems detecting the U3.

Otherwise your problems are typical and among the reasons why the U3 totally sucks.

[Kx-38ngv]

Code:

 cgminer version 4.9.2 - Started: [2015-12-28 23:46:56]
--------------------------------------------------------------------------------
 (5s):36.30G (1m):30.10G (5m):13.39G (15m):5.303G (avg):30.80Gh/s
 A:916  R:0  HW:1  WU:430.0/m
 Connected to uk1.ghash.io diff 46 with stratum as user Korax38.worker1
 Block: 3a50648a...  Diff:93.4G  Started: [23:49:28]  Best share: 556
--------------------------------------------------------------------------------
 [U]SB management [P]ool management [S]ettings [D]isplay options [Q]uit
 0: AU3 0       : 245MHz 845mV            | 32.27G / 30.73Gh/s WU:430.0/m
--------------------------------------------------------------------------------

Detect after 45 minutes of plug-off/plug-in , but , the 30Gh/s is normal ? last week i get the normal rate , like 60Gh/s ...

[zOU]

I would go with a frequency of 237.50 and voltage of 800 for something stable.

well bitmain support asked me to test it with their outdated cgminer 4.8 with  --bmsc-voltage 0830 --bmsc-freq 0982

but that doesn't change anything....

LED status is wrong and cgminer -n reports an error....

[Mikestang]

My last U3 just died.  I can see it with zadig and reinstall the driver, but it does not get recognized by cgminer, nor is the R1 able to fire it up as a controller.  The red USB led lights up, but that's it.  It will no longer hash no matter what I do.  RIP U3.

Yours may just be dead/defect also, zOU.

[zOU]

After less than 6month....

That would be sad...

[megatron1337]

My last U3 just died.  I can see it with zadig and reinstall the driver, but it does not get recognized by cgminer, nor is the R1 able to fire it up as a controller.  The red USB led lights up, but that's it.  It will no longer hash no matter what I do.  RIP U3.

Yours may just be dead/defect also, zOU.

And as usual it's never the users fault and bitmain sent you a crappy u3 right?
I don't want to say it's your fault but chances are you overclocked it behond safe parameters even though you might not admit it.

[notlist3d]

My last U3 just died.  I can see it with zadig and reinstall the driver, but it does not get recognized by cgminer, nor is the R1 able to fire it up as a controller.  The red USB led lights up, but that's it.  It will no longer hash no matter what I do.  RIP U3.

Yours may just be dead/defect also, zOU.

And as usual it's never the users fault and bitmain sent you a crappy u3 right?
I don't want to say it's your fault but chances are you overclocked it behond safe parameters even though you might not admit it.

I have 3 out of 3 working fine with my R1.  I am not trying to push them though.  I get around 50GH or so out of each and around 150GH or a tad less out of all together.   So far has seemed to work pretty good.

I don't really OC anymore on any of my miners.  During S3 day's I didn't have a second thought about doing it.  But i just don't risk it anymore besides my compacs I do push them sometimes.

[megatron1337]

My last U3 just died.  I can see it with zadig and reinstall the driver, but it does not get recognized by cgminer, nor is the R1 able to fire it up as a controller.  The red USB led lights up, but that's it.  It will no longer hash no matter what I do.  RIP U3.

Yours may just be dead/defect also, zOU.

And as usual it's never the users fault and bitmain sent you a crappy u3 right?
I don't want to say it's your fault but chances are you overclocked it behond safe parameters even though you might not admit it.

I have 3 out of 3 working fine with my R1.  I am not trying to push them though.  I get around 50GH or so out of each and around 150GH or a tad less out of all together.   So far has seemed to work pretty good.

I don't really OC anymore on any of my miners.  During S3 day's I didn't have a second thought about doing it.  But i just don't risk it anymore besides my compacs I do push them sometimes.

I quoted mikestang..  How come you're answering? lol

[dime2spend]

Just got my U3. After compiling cgminer with icarus-enabled I have it running now at solo.ckpool.org just for fun. To be on the safe side (at least I hope so) I used the following options "--au3-freq 200" and "--au3-volt 725". So far the baseplate of the miner as well as the power brick is staying relatively cool. The miner is hashing with around 50 Gh/s which is quite ok for underclocking it.

Curious to see how long it takes before it zombies/melts/burns/explodes/solves a block or whatever ...

[Mikestang]

My last U3 just died.  I can see it with zadig and reinstall the driver, but it does not get recognized by cgminer, nor is the R1 able to fire it up as a controller.  The red USB led lights up, but that's it.  It will no longer hash no matter what I do.  RIP U3.

Yours may just be dead/defect also, zOU.

And as usual it's never the users fault and bitmain sent you a crappy u3 right?
I don't want to say it's your fault but chances are you overclocked it behond safe parameters even though you might not admit it.

Not sure where this attack is coming from...  I have run my U3 well within its operating parameters for the entirety that I have owned it.  For the last several months that has been 785volt 237.5freq, well well below not only the maximum values, but below bitmains recommended settings as well (which you can find in this thread if you dig back far enough).  I can assure you this was not user error, for months it "worked just fine"*, then suddenly it will no longer hash.  The U3 is a piece of shit, this is no secret, so a sudden failure comes as no surprise to me.


*there is no such thing as a U3 that works just fine

[notlist3d]

My last U3 just died.  I can see it with zadig and reinstall the driver, but it does not get recognized by cgminer, nor is the R1 able to fire it up as a controller.  The red USB led lights up, but that's it.  It will no longer hash no matter what I do.  RIP U3.

Yours may just be dead/defect also, zOU.

And as usual it's never the users fault and bitmain sent you a crappy u3 right?
I don't want to say it's your fault but chances are you overclocked it behond safe parameters even though you might not admit it.

I have 3 out of 3 working fine with my R1.  I am not trying to push them though.  I get around 50GH or so out of each and around 150GH or a tad less out of all together.   So far has seemed to work pretty good.

I don't really OC anymore on any of my miners.  During S3 day's I didn't have a second thought about doing it.  But i just don't risk it anymore besides my compacs I do push them sometimes.

I quoted mikestang..  How come you're answering? lol

I answered with my luck on 3 without pushing OC hard or anything like that.  I quoted you as I thought it was worth keeping in it as good points.

With U3 I would not push it to hard myself just as I had so many zombies I don't like to add to issues.  But since getting my R1 with crazyguy's custom firmware I have not touched my U3's in over a month  maybe close to 2.

[zOU]

My last U3 just died.  I can see it with zadig and reinstall the driver, but it does not get recognized by cgminer, nor is the R1 able to fire it up as a controller.  The red USB led lights up, but that's it.  It will no longer hash no matter what I do.  RIP U3.

Yours may just be dead/defect also, zOU.

And as usual it's never the users fault and bitmain sent you a crappy u3 right?
I don't want to say it's your fault but chances are you overclocked it behond safe parameters even though you might not admit it.

Not sure where this attack is coming from...  I have run my U3 well within its operating parameters for the entirety that I have owned it.  For the last several months that has been 785volt 237.5freq, well well below not only the maximum values, but below bitmains recommended settings as well (which you can find in this thread if you dig back far enough).  I can assure you this was not user error, for months it "worked just fine"*, then suddenly it will no longer hash.  The U3 is a piece of shit, this is no secret, so a sudden failure comes as no surprise to me.


*there is no such thing as a U3 that works just fine

hehe thank you Mike

I've never ran mine (and still don't) over the 63Ghs mark which is what they are given for (and which is what bitmain support asked me during the tests)

[dime2spend]

After running it about 20 hours I have nothing to complain about the U3 so far. I will keep it underclocked because it seems to run quite stable that way. And it doesn't matter anyway 50 Gh/s or 67 Gh/s is way too little in any case these days.

[.anto.]

I bought 2 Antminer U3s in August this year. Today 1 ASIC chip on each of them stop hashing, the 3rd chip on the first one and the 1st chip on the second one. I have tried resetting them so many times but they keep refusing to do the hashing. So the chips just seem to work for only 4 months.



I want to try to desolder the good chip from one miner to replace the bad one on the other miner.

Does anybody know how to identify the exact location of the bad chips?

On the PCB, the BM1382 ASIC chips are identified as U8, U9, U10 and U11. Could anybody confirm please that on my AMU0 the bad chip is U10 and on my AMU1 the bad chip is U8?

Thanks in advance for your help.

[puck2]

After running it about 20 hours I have nothing to complain about the U3 so far. I will keep it underclocked because it seems to run quite stable that way. And it doesn't matter anyway 50 Gh/s or 67 Gh/s is way too little in any case these days.

Where did you pick up a U3? I'm looking around... I'd like to pay bitcoin.

[zOU]

Bitmain website is a good start

[dime2spend]

After running it about 20 hours I have nothing to complain about the U3 so far. I will keep it underclocked because it seems to run quite stable that way. And it doesn't matter anyway 50 Gh/s or 67 Gh/s is way too little in any case these days.

Where did you pick up a U3? I'm looking around... I'd like to pay bitcoin.

I got mine from www.usbminer.ch and I also paid with Bitcoins.

And regarding the issues so many owners of the U3 have, no worries my U3 isn't flawless either. My U3 did zombie after running it for about 24 hours. I had to replug the USB-cable to bring it back to life. No overheating issues so far but then I do underclock and undervolt it.

[baazju]

After running it about 20 hours I have nothing to complain about the U3 so far. I will keep it underclocked because it seems to run quite stable that way. And it doesn't matter anyway 50 Gh/s or 67 Gh/s is way too little in any case these days.

Where did you pick up a U3? I'm looking around... I'd like to pay bitcoin.

I have 7 brand new I just got in. Can sell for BTC assuming you are in US.

[notlist3d]

After running it about 20 hours I have nothing to complain about the U3 so far. I will keep it underclocked because it seems to run quite stable that way. And it doesn't matter anyway 50 Gh/s or 67 Gh/s is way too little in any case these days.

Where did you pick up a U3? I'm looking around... I'd like to pay bitcoin.

I have 7 brand new I just got in. Can sell for BTC assuming you are in US.

Where did you get them brand new from?  I was thinking bitmain was not selling them.

So just curious on your source of brand new U3's.

[baazju]

After running it about 20 hours I have nothing to complain about the U3 so far. I will keep it underclocked because it seems to run quite stable that way. And it doesn't matter anyway 50 Gh/s or 67 Gh/s is way too little in any case these days.

Where did you pick up a U3? I'm looking around... I'd like to pay bitcoin.

I have 7 brand new I just got in. Can sell for BTC assuming you are in US.

Where did you get them brand new from?  I was thinking bitmain was not selling them.

So just curious on your source of brand new U3's.

I got them from my supplier in China, picked up the last few they had to resell in the states.