ANTMINER U3 Discussion and Support Thread

[notlist3d]

Help guys, I have 2 U3 antminer, 1 I bought from china, the other I got in my country. The chinese one came with original power supply conected to pc and tried on raspeberry pi 2, both with no success. Chinese from start didn't work, got steady light at led and tf1 (leds), sometimes rf1 blinks once and stops, cgminer doesn't detect u3, but windows does I followed instructions and used au3-freq 225 au3-volt 750, as described as default for the miner.  Chinese seller did extensive test over teamview an decided to send a new board.

It took 60days for the u3 to come, so more 60days with a new paper weigth, I got angry just tinking about it and bought another U3 in my country to mine while the board doesn't arive.

The new u3was the same model, I did the same config, worked for 1 day and stopped working. Now I only get a steady light at led, and rf1 blinks once no other.

Can any one help me understand or maybe fix, if its fixable?

Are you using same power supply? Do the two share any part's.  To have 2 dud's from different sources is unlikely.  I'm guessing there is a shared issue.

And I could be wrong but look at what the two share.   With windows Zadig can sometimes give problems.  So might look into driver.  With RPI though I would try more with it.  What issues did you run into with RPI?

[akito2y]

Help guys, I have 2 U3 antminer, 1 I bought from china, the other I got in my country. The chinese one came with original power supply conected to pc and tried on raspeberry pi 2, both with no success. Chinese from start didn't work, got steady light at led and tf1 (leds), sometimes rf1 blinks once and stops, cgminer doesn't detect u3, but windows does I followed instructions and used au3-freq 225 au3-volt 750, as described as default for the miner.  Chinese seller did extensive test over teamview an decided to send a new board.

It took 60days for the u3 to come, so more 60days with a new paper weigth, I got angry just tinking about it and bought another U3 in my country to mine while the board doesn't arive.

The new u3was the same model, I did the same config, worked for 1 day and stopped working. Now I only get a steady light at led, and rf1 blinks once no other.

Can any one help me understand or maybe fix, if its fixable?

Are you using same power supply? Do the two share any part's.  To have 2 dud's from different sources is unlikely.  I'm guessing there is a shared issue.

And I could be wrong but look at what the two share.   With windows Zadig can sometimes give problems.  So might look into driver.  With RPI though I would try more with it.  What issues did you run into with RPI?

The one that i got from china, arrived dead with original power supply, the one that I bought in my country came with a switch power supply.

Before the u3 from my country stop working, i tried tried both power supllies on it, both worked perfectly (so that would rule out power supply problem).

They never shared a part, only power supply and usb cable, so i could rule out bought as a faulty part. They didn't use the same power supply simultaneously. It couldn't be zadig, since i always used the raspeberry pi 2 too mine. About the led light i tried with different cables, different systems (pi and pc), different usb cables, different usb ports, different power supplies.

[kilo17]

I am normally a big hash guy but have recently started getting into the "fun" stuff and have ordered some Compac's, U3 and R1's to play with.

I was wondering if there is a good guide to running these from an Rpi?  Is Minera the way to go?

Thanks in advance

[notlist3d]

I am normally a big hash guy but have recently started getting into the "fun" stuff and have ordered some Compac's, U3 and R1's to play with.

I was wondering if there is a good guide to running these from an Rpi?  Is Minera the way to go?

Thanks in advance

Best way with the U3's is a R1 with crazy guy's custom firmware.  I think it is the most solid controller out there.  A lot babysit U3's which is no fun on such a small miner.

If you don't go with the R1 and crazy guy, you will need a way to automate restarting of zombies as they are a pain.

[kilo17]

I am normally a big hash guy but have recently started getting into the "fun" stuff and have ordered some Compac's, U3 and R1's to play with.

I was wondering if there is a good guide to running these from an Rpi?  Is Minera the way to go?

Thanks in advance

Best way with the U3's is a R1 with crazy guy's custom firmware.  I think it is the most solid controller out there.  A lot babysit U3's which is no fun on such a small miner.

If you don't go with the R1 and crazy guy, you will need a way to automate restarting of zombies as they are a pain.

I have a couple of Compac's and CrazyGuys Rpi for those but not his R1's, he was/is out.  I do have a couple coming though and wonder if would make it available to me

[notlist3d]

I am normally a big hash guy but have recently started getting into the "fun" stuff and have ordered some Compac's, U3 and R1's to play with.

I was wondering if there is a good guide to running these from an Rpi?  Is Minera the way to go?

Thanks in advance

Best way with the U3's is a R1 with crazy guy's custom firmware.  I think it is the most solid controller out there.  A lot babysit U3's which is no fun on such a small miner.

If you don't go with the R1 and crazy guy, you will need a way to automate restarting of zombies as they are a pain.

I have a couple of Compac's and CrazyGuys Rpi for those but not his R1's, he was/is out.  I do have a couple coming though and wonder if would make it available to me

The great thing is he released his custom firmware to public.  So no longer is it just his customers, he kept his word once he sold out he posted it.

Bitmain does have batch 2 up it has been going up in price though... which kinda stinks.  But it was a game changer for me going from having to restart the U3's to the R1 taking care of all of it with the custom firmware. Link to firmware - https://bitcointalk.org/index.php?topic=1196852.msg13385790#msg13385790

[Mikestang]

Pages and pages and pages of problems with U3s and people are still buying them?  I don't get it.

Everyone, save yourself endless headaches and buy some gekko compac sticks!  Get 3 of them and they will equal a U3 in hash power but they don't "need" and R1 to control them and keep them running and they never zombie or have any other issues!

[RichBC]

Pages and pages and pages of problems with U3s and people are still buying them?  I don't get it.

Everyone, save yourself endless headaches and buy some gekko compac sticks!  Get 3 of them and they will equal a U3 in hash power but they don't "need" and R1 to control them and keep them running and they never zombie or have any other issues!

The only headache you are left with unfortunately is the more you own the more money you loose when mining. 

Rich

[Mikestang]

But at least with the gekko sticks they are fun to tinker with!  They all respond the same, too, which isn't something you can say about the U3.

[notlist3d]

But at least with the gekko sticks they are fun to tinker with!  They all respond the same, too, which isn't something you can say about the U3.

After getting a R1 with cray guy's firmwareI enjoyed my U3's they worked very solid with that setup.  Now talk about windows I ran for a few weeks or so.... horrible experience. So it  can very greatly.

I suggest everyone getting something  with automation on fixing zombies or you will be babysitting your U3's.

[leowonderful]

U3s really that bad? I was going to get one or two before I heard about the zombie problem with these miners. Friends say the same thing as well.. suggestion?

[notlist3d]

U3s really that bad? I was going to get one or two before I heard about the zombie problem with these miners. Friends say the same thing as well.. suggestion?

If you have automation to help with zombies no for the money they are not  bad miners.   If you don't have automation on fixing... .it becomes a huge pain reseting zombies.

So all depends on your situation and controller you use.  I personally liked my U3's after I got crazy guy's firmware on a R1.

[justchill]

Hi,

I'm wondering if this one:

http://www.benl.ebay.be/itm/Virtual-bitcoin-mining-machine-u3-USB-Miner-asic-in-hand-Antminer-Bitmain-BTC-/381552637401?hash=item58d64f35d9:g:1WIAAOSwAKxWUxeN

is a real U3 antminer or a fake one?

[notlist3d]

Hi,

I'm wondering if this one:

http://www.benl.ebay.be/itm/Virtual-bitcoin-mining-machine-u3-USB-Miner-asic-in-hand-Antminer-Bitmain-BTC-/381552637401?hash=item58d64f35d9:g:1WIAAOSwAKxWUxeN

is a real U3 antminer or a fake one?

I don't think anyone has made a fake U3 that I know of.  If someone knocked it off that would be new.  The thing I don't understand is if the "Virtual" part of the auction as long as they are shipping you a U3 you should be good.   But other language + virtual needs someone else besides me to look at it.

Also before U3 read about zombies, and good methods to control them or it's going to be a pain.

[Mikestang]

is a real U3 antminer or a fake one?

Looks like someone is trying to sell "cloud mining" via a U3 that they host somewhere else?  Looks sketchy as hell to me.  U3 hash isn't worth anything unless you have one for fun, and even then they are not much fun because they always have problems and you basically have to buy an R1 an install custom firmware to get them to work reliably.

[notlist3d]

is a real U3 antminer or a fake one?

Looks like someone is trying to sell "cloud mining" via a U3 that they host somewhere else?  Looks sketchy as hell to me.  U3 hash isn't worth anything unless you have one for fun, and even then they are not much fun because they always have problems and you basically have to buy an R1 an install custom firmware to get them to work reliably.

I could not tell they mention virtual... I could not tell if virtual miner or saying BTC is virtual.  I tried my best through google translate.  They do mention shipping ... so part of it sounds like shipping a miner.  Other part virtual... it is either sketchy or my inability to read that language.

[justchill]

price looks also so cheap.

[RichBC]

is a real U3 antminer or a fake one?

Looks like someone is trying to sell "cloud mining" via a U3 that they host somewhere else?  Looks sketchy as hell to me.  U3 hash isn't worth anything unless you have one for fun, and even then they are not much fun because they always have problems and you basically have to buy an R1 an install custom firmware to get them to work reliably.

I could not tell they mention virtual... I could not tell if virtual miner or saying BTC is virtual.  I tried my best through google translate.  They do mention shipping ... so part of it sounds like shipping a miner.  Other part virtual... it is either sketchy or my inability to read that language.

I think it's just a sale of the U3. The "Virtual" word is I think just misleading.

Price is about right, and remember unless you have very cheap electricity it will loose money.

Rich

[justchill]

And what do they mean by gridseed miner?

[notlist3d]

And what do they mean by gridseed miner?

What does who mean?  Can you point to a link of this?

I just am not seeing gridseed being referenced.