ANTMINER U3 Discussion and Support Thread

[Jake36]

Guys dear,please help me.I bought two antminer u3 and wanted to connect them to the laptop but nothing happened.Managed to connect only one of u3,two u3 did not want to work in.I believe that the problem lies in the fact that in the bat file I have written only one device.I don't understand and don't know how to register two devices.may need to add something in the config,but I don slightest and have no idea how to do it.help tell me what to do.if you can give an example of a bat file or config.the hope is only for the your help.thanks for earlier.

What version of CGminer are you using?   Also you telling it the one device and not other two?  That would for sure cause it.

Try without picking specific device.  As long as you have only U3's connected it will work fine.  If you have other miners yes it will be harder.

I use cgminer 4.8.0 .when connected one device then everything works fine.when two devices are attached nothing happens.production will not start.I saw somewhere that in order to connect two or more miners need to use the command -d ,but how to use it?where to write ?I do not understand and do not represent.

Go ahead and try a newer verision 4.9.2 is what I'm using. I'm not aware of a reason to keep it old with the U3's.

Remove the -d and it should find all U3's.  If not try unplugging power and usb from all miners and see if you and replug them (in case they hit that zombie mode).

I downloaded cgminer 4.9.2 but I do not understand how to start.he asks to register the url.what is a url?? I'm sorry I do not understand how to use cgminer.I know how to run cgminer only through .bat file.I also put in .bat cgminer.exe --bmsc-options 115200:0.6 -o stratum+tcp://thecoin.pw:3540 -xxxxxxx -p xxxxx --bmsc-voltage 0800 --bmsc-freq 1286 .when you run .bat file to open cgminer window for a split second and closes.nothing else happens.help me please.what am I doing wrong. I don't know anything in cgminer.

asks to register the url.what is a url stratum+tcp://thecoin.pw:3540

ck-'s cgminer does not use --bmsc for the U3's, it's --au3-freq 225 <225 is default, you can use up to 250> --au3-volt 775 <775 is default, use from 725 - 850, what ever gives you best hash at your freq>.

[navigatorus]

Guys dear,please help me.I bought two antminer u3 and wanted to connect them to the laptop but nothing happened.Managed to connect only one of u3,two u3 did not want to work in.I believe that the problem lies in the fact that in the bat file I have written only one device.I don't understand and don't know how to register two devices.may need to add something in the config,but I don slightest and have no idea how to do it.help tell me what to do.if you can give an example of a bat file or config.the hope is only for the your help.thanks for earlier.

What version of CGminer are you using?   Also you telling it the one device and not other two?  That would for sure cause it.

Try without picking specific device.  As long as you have only U3's connected it will work fine.  If you have other miners yes it will be harder.

I use cgminer 4.8.0 .when connected one device then everything works fine.when two devices are attached nothing happens.production will not start.I saw somewhere that in order to connect two or more miners need to use the command -d ,but how to use it?where to write ?I do not understand and do not represent.

Go ahead and try a newer verision 4.9.2 is what I'm using. I'm not aware of a reason to keep it old with the U3's.

Remove the -d and it should find all U3's.  If not try unplugging power and usb from all miners and see if you and replug them (in case they hit that zombie mode).

I downloaded cgminer 4.9.2 but I do not understand how to start.he asks to register the url.what is a url?? I'm sorry I do not understand how to use cgminer.I know how to run cgminer only through .bat file.I also put in .bat cgminer.exe --bmsc-options 115200:0.6 -o stratum+tcp://thecoin.pw:3540 -xxxxxxx -p xxxxx --bmsc-voltage 0800 --bmsc-freq 1286 .when you run .bat file to open cgminer window for a split second and closes.nothing else happens.help me please.what am I doing wrong. I don't know anything in cgminer.

asks to register the url.what is a url stratum+tcp://thecoin.pw:3540

ck-'s cgminer does not use --bmsc for the U3's, it's --au3-freq 225 <225 is default, you can use up to 250> --au3-volt 775 <775 is default, use from 725 - 850, what ever gives you best hash at your freq>.

thank you.now I know where to set the frequency and the voltage in cgminer 4.9.2 look what .bat file I get cgminer -o stratum+tcp://thecoin.pw:3540 -u xxx -p xxx -o stratum+tcp://thecoin.pw:3541 -u xxx -p xxx --au3-freq 250 --au3-volt 800 .but the question remains open what else should I add in there to work simultaneously two antminer u3

[notlist3d]

Guys dear,please help me.I bought two antminer u3 and wanted to connect them to the laptop but nothing happened.Managed to connect only one of u3,two u3 did not want to work in.I believe that the problem lies in the fact that in the bat file I have written only one device.I don't understand and don't know how to register two devices.may need to add something in the config,but I don slightest and have no idea how to do it.help tell me what to do.if you can give an example of a bat file or config.the hope is only for the your help.thanks for earlier.

What version of CGminer are you using?   Also you telling it the one device and not other two?  That would for sure cause it.

Try without picking specific device.  As long as you have only U3's connected it will work fine.  If you have other miners yes it will be harder.

I use cgminer 4.8.0 .when connected one device then everything works fine.when two devices are attached nothing happens.production will not start.I saw somewhere that in order to connect two or more miners need to use the command -d ,but how to use it?where to write ?I do not understand and do not represent.

Go ahead and try a newer verision 4.9.2 is what I'm using. I'm not aware of a reason to keep it old with the U3's.

Remove the -d and it should find all U3's.  If not try unplugging power and usb from all miners and see if you and replug them (in case they hit that zombie mode).

I downloaded cgminer 4.9.2 but I do not understand how to start.he asks to register the url.what is a url?? I'm sorry I do not understand how to use cgminer.I know how to run cgminer only through .bat file.I also put in .bat cgminer.exe --bmsc-options 115200:0.6 -o stratum+tcp://thecoin.pw:3540 -xxxxxxx -p xxxxx --bmsc-voltage 0800 --bmsc-freq 1286 .when you run .bat file to open cgminer window for a split second and closes.nothing else happens.help me please.what am I doing wrong. I don't know anything in cgminer.

asks to register the url.what is a url stratum+tcp://thecoin.pw:3540

ck-'s cgminer does not use --bmsc for the U3's, it's --au3-freq 225 <225 is default, you can use up to 250> --au3-volt 775 <775 is default, use from 725 - 850, what ever gives you best hash at your freq>.

thank you.now I know where to set the frequency and the voltage in cgminer 4.9.2 look what .bat file I get cgminer -o stratum+tcp://thecoin.pw:3540 -u xxx -p xxx -o stratum+tcp://thecoin.pw:3541 -u xxx -p xxx --au3-freq 250 --au3-volt 800 .but the question remains open what else should I add in there to work simultaneously two antminer u3

It should detect them both automatically.  Just don't select them with that parameter and it looks for them.  I believe that I what I did.   

If it does not detect them then I would try to select them.

[Mikestang]

what else should I add in there to work simultaneously two antminer u3

If you read this thread you'll find that more people had problems running more than 1 U3 at the same time than could do so successfully.  You may be in the majority where you can only have one U3 running at a time.

[notlist3d]

what else should I add in there to work simultaneously two antminer u3

If you read this thread you'll find that more people had problems running more than 1 U3 at the same time than could do so successfully.  You may be in the majority where you can only have one U3 running at a time.

It could be luck but I have 3 U3's running right now.  They do zombie out sometimes but are fun to play with.  To be fair it's not that they zombie out a ton, it's just that I don't notice it right away as I don't keep a eye on them as much as some might.

[navigatorus]

what else should I add in there to work simultaneously two antminer u3

If you read this thread you'll find that more people had problems running more than 1 U3 at the same time than could do so successfully.  You may be in the majority where you can only have one U3 running at a time.

It could be luck but I have 3 U3's running right now.  They do zombie out sometimes but are fun to play with.  To be fair it's not that they zombie out a ton, it's just that I don't notice it right away as I don't keep a eye on them as much as some might.

what is a zombie?why u3 to become zombies?how to fix it?
 

[notlist3d]

what else should I add in there to work simultaneously two antminer u3

If you read this thread you'll find that more people had problems running more than 1 U3 at the same time than could do so successfully.  You may be in the majority where you can only have one U3 running at a time.

It could be luck but I have 3 U3's running right now.  They do zombie out sometimes but are fun to play with.  To be fair it's not that they zombie out a ton, it's just that I don't notice it right away as I don't keep a eye on them as much as some might.

what is a zombie?why u3 to become zombies?how to fix it?
 

Unplug power and usb on miner, then plug back in.  It should fix it.

If that does not fix it try restarting cgminer (or what ever program your using)

[Mikestang]

what is a zombie?why u3 to become zombies?how to fix it?
 

The answer to "why" is poor hardward design by Bitmain.  There's something screwy about the usb and power and how it's all done on the circuit board.  I don't know enough to talk details, I'm only repeating the tl;dr of what a hardware guy told me after tearing into one.

[navigatorus]

what else should I add in there to work simultaneously two antminer u3

If you read this thread you'll find that more people had problems running more than 1 U3 at the same time than could do so successfully.  You may be in the majority where you can only have one U3 running at a time.

It could be luck but I have 3 U3's running right now.  They do zombie out sometimes but are fun to play with.  To be fair it's not that they zombie out a ton, it's just that I don't notice it right away as I don't keep a eye on them as much as some might.

what is a zombie?why u3 to become zombies?how to fix it?
 

Unplug power and usb on miner, then plug back in.  It should fix it.

If that does not fix it try restarting cgminer (or what ever program your using)

it's understandable.my question is,why u3 turns into a zombie?why is this and how can we avoid this??

[notlist3d]

what else should I add in there to work simultaneously two antminer u3

If you read this thread you'll find that more people had problems running more than 1 U3 at the same time than could do so successfully.  You may be in the majority where you can only have one U3 running at a time.

It could be luck but I have 3 U3's running right now.  They do zombie out sometimes but are fun to play with.  To be fair it's not that they zombie out a ton, it's just that I don't notice it right away as I don't keep a eye on them as much as some might.

what is a zombie?why u3 to become zombies?how to fix it?
 

Unplug power and usb on miner, then plug back in.  It should fix it.

If that does not fix it try restarting cgminer (or what ever program your using)

it's understandable.my question is,why u3 turns into a zombie?why is this and how can we avoid this??

There is not a definite anwser.  Reading i have seen some say using some PSU's instead of those cords can help.   Have seen some claim linux might help.

At end of day though if it was know why it does it or it would be fixed.  It is going to happpen you have to watch the U3's more then a lot of miners.

[Mikestang]

it's understandable.my question is,why u3 turns into a zombie?why is this and how can we avoid this??

Look up one post above your reply.

[navigatorus]

what else should I add in there to work simultaneously two antminer u3

If you read this thread you'll find that more people had problems running more than 1 U3 at the same time than could do so successfully.  You may be in the majority where you can only have one U3 running at a time.

It could be luck but I have 3 U3's running right now.  They do zombie out sometimes but are fun to play with.  To be fair it's not that they zombie out a ton, it's just that I don't notice it right away as I don't keep a eye on them as much as some might.

what is a zombie?why u3 to become zombies?how to fix it?
 

Unplug power and usb on miner, then plug back in.  It should fix it.

If that does not fix it try restarting cgminer (or what ever program your using)

it's understandable.my question is,why u3 turns into a zombie?why is this and how can we avoid this??

There is not a definite anwser.  Reading i have seen some say using some PSU's instead of those cords can help.   Have seen some claim linux might help.

At end of day though if it was know why it does it or it would be fixed.  It is going to happpen you have to watch the U3's more then a lot of miners.

I use an ATX PSU,and noticed that one miner was never the zombies,and the second periodically became zombies when I was able to connect,I noticed a bad power connector on the second miner and replaced.I think the point is the power of the miner. guys can anyone tell me good pool for mining??what settings frequency / voltage do you recommend for maximum performance u3.thank you.

[zOU]

Hello,

It looks like I have a lot of HW errors but not too many rejected though...



cgminer options:

--au3-freq 250 --au3-volt 800

But I have as much when running with no option (so default V and frequence)

Each U3 has a 80mm fan blowing on the bottom plate, so temperature shouldn't be an issue... ?

DEV   Temp   Frequency          Dev HR      Shares         AC   % AC      RE   % RE    HW   % HW   Last share                Last share time
  AU30   n.a.   not available   59.70Gh/s   2115557717   215   11.74%   0   0.00%   1617   88.26%   33 secs ago   Thu, 01 Oct 2015 15:56:29 GMT
  AU31   n.a.   not available   62.36Gh/s   2329590253   244   94.57%   1   0.39%   13     5.04%   20 secs ago   Thu, 01 Oct 2015 15:56:42 GMT
  AU32   n.a.   not available   61.45Gh/s   2214198798   224   16.29%   1   0.07%   1150   83.64%   6 secs ago   Thu, 01 Oct 2015 15:56:56 GMT

[Mikestang]

Well from my experience the U3 sometimes just freaks out and gives you HW errors out the wazoo.

I fire one of mine up every now and then, and just recently I had one running fine for a few days at 785/237.5 for about 51GH/s.  It would zombie out, like they do, but otherwise ran ok with HW error about 2%.  Then, for no reason, yesterday it started going crazy on the HW error and no matter what settings I run it gives me 20% HW error.  So I tried another U3 and get the same thing, so I unplugged them and put them away.  When I get bored I'll try plugging one in again and maybe I'll get lucky and it'll run, or maybe not.

[zOU]

Well, I power them off for 15mn at midnight and noon everyday to prevent them going zombie.

We'll see if there's any improvement.

Thx !

[notlist3d]

Well from my experience the U3 sometimes just freaks out and gives you HW errors out the wazoo.

I fire one of mine up every now and then, and just recently I had one running fine for a few days at 785/237.5 for about 51GH/s.  It would zombie out, like they do, but otherwise ran ok with HW error about 2%.  Then, for no reason, yesterday it started going crazy on the HW error and no matter what settings I run it gives me 20% HW error.  So I tried another U3 and get the same thing, so I unplugged them and put them away.  When I get bored I'll try plugging one in again and maybe I'll get lucky and it'll run, or maybe not.

Mine is not horrible I have 3 U3's running.  And it seems once a day I have a zombie.   So it's a pain but as long as I'm home not a huge deal.   

If it was big maching and I was losing ton's of hash, this would be a lot bigger deal.  But with me doing lotto mining for fun it's not really about ROI.

[tolazy]

Hi.


is there a way to have cgminer not to include the U3 so i can run another cgminer just for that.. i have 3 U2's that i want to use for another pool then the U3

running linux

[Mikestang]

Hi.


is there a way to have cgminer not to include the U3 so i can run another cgminer just for that.. i have 3 U2's that i want to use for another pool then the U3

running linux

Try including --usb :3 in the batch file for your U2s, then launch cgminer for the U2s.  It should fire up and pick up the 3 U2, but with the --usb :3 it will only look for 3 devices total.  Then start another instance of cgminer for the U3, it will see the U2s as "busy" and won't initialize them, but it will pick up the U3.

[tolazy]

had to move around the usb a bit but it worked thanks Mikestang


U3 works with --usb 1
and the others start just fine in another cgminer

will probably change around the usb devices when i get my 10p hub so it places first och last

[Mikestang]

U3 works with --usb 1

Glad it worked for you, I'm doing the same thing with several of my usb sticks and one U3.

But check your syntax, per the readme the command should be

Code:

--usb :1

don't forget the colon.