[GROUP BUY WORLDWIDE]BTMine v1 Miner 200GH/s BTC 2.4 - page 23.

sailem09

newbie

Activity: 27

Merit: 0

Quote from: mtnminer on January 23, 2014, 06:39:05 PM

I am not trying to excuse BTmine, but I have noticed looking at this forum and others that have Chinese eruptor cubes for sale used, there is a fairly high rate of module failure out of the box new is common!

So, that leaves us the consumers with facts to consider, Butterfly Labs is slower than molasses flowing up hill in winter, but the units I own from the have worked flawlessly. So if we want Chinese delivery speed, we will have to deal with Chinese quality issues.

I wish we could have both quality and speed of delivery, but these do not seem to coexist often in the ASIC's world. As a former RF Engineer I will take the speed of delivery, the best quality I can buy and do some fine tuning and tweaking of the units I purchase. I will still be ahead of waiting for a January order with a March delivery date if I am lucky.

Mtnminer

They have no excuse!! all they had to do was wrap the boards in anti static bubble wrap and tape it to the chassis. Just doing that would of prevented all the problems that we are having. Who in there right mind would just leave unscrewed delicate components to free float inside a metal box with pointy fan screws to fly across the pacific ocean in a bumpy ride.

I contacted them about my defective boards and provided pictures of the unboxing and damages. They want me to spend money on shipping which was estimated this morning at $120 to ship them back the defective blades for repair and wait to who knows how many days or weeks to get them back.

mtnminer

sr. member

Activity: 294

Merit: 250

I am not trying to excuse BTmine, but I have noticed looking at this forum and others that have Chinese eruptor cubes for sale used, there is a fairly high rate of module failure out of the box new is common!

So, that leaves us the consumers with facts to consider, Butterfly Labs is slower than molasses flowing up hill in winter, but the units I own from the have worked flawlessly. So if we want Chinese delivery speed, we will have to deal with Chinese quality issues.

I wish we could have both quality and speed of delivery, but these do not seem to coexist often in the ASIC's world. As a former RF Engineer I will take the speed of delivery, the best quality I can buy and do some fine tuning and tweaking of the units I purchase. I will still be ahead of waiting for a January order with a March delivery date if I am lucky.

Mtnminer

sikke

sr. member

Activity: 504

Merit: 250

Quote from: mtnminer on January 23, 2014, 06:14:38 PM

Well, you were spared about five (5) days ago, as that's is when they closed the sale. So you sat on the fence way to long. I believe these Chinese units are definitely for the electronic savvy only, better than a kit, but definitely a do it yourself unit to a great degree!

Mtnminer3

Quote from: The Observer on January 23, 2014, 06:03:00 PM

Wow, i sat on the fence about ordering one of these for over a week, was finally going to make the leap of faith today, but after reading about the TONS of problems everyone who bought one has had, i am glad i didnt order, and dont think i will be in the future. Antminers it is i guess.

Yes it is a kit. All the screws are bottom of shipping box Roll Eyes

I still love it and now planning to add extra blades. 3 blades could be 330 GH/s

Antminers are way to go for those who want to buy miners and watch them mine not to tinker them.
Antminer is way more power efficient
Antminer is only miner that ships NOW Bitmain is minting $$$ by selling those and not giving chips out to OEM

http://cointerra.com/product/terraminer-iv-2ths-networked-asic-miner-may-batch/

People are still ordering Cointerra 2TH/s that ships in May... wtf.
You can get Antminers with that 6000$ and start hashing next week.

dozerz

legendary

Activity: 2242

Merit: 1057

What command line to use in cgminer when I get it connected to a pc with usb?

mtnminer

sr. member

Activity: 294

Merit: 250

Well, you were spared about five (5) days ago, as that's is when they closed the sale. So you sat on the fence way to long. I believe these Chinese units are definitely for the electronic savvy only, better than a kit, but definitely a do it yourself unit to a great degree!

Mtnminer

Quote from: The Observer on January 23, 2014, 06:03:00 PM

Wow, i sat on the fence about ordering one of these for over a week, was finally going to make the leap of faith today, but after reading about the TONS of problems everyone who bought one has had, i am glad i didnt order, and dont think i will be in the future. Antminers it is i guess.

Professoruss

member

Activity: 64

Merit: 10

Quote from: twib2 on January 23, 2014, 05:53:33 PM

Quote from: Professoruss on January 23, 2014, 05:45:11 PM

Seems as if one of mine is getting quite a few rejected/hw errors. Is this normal?

Those are difficulty 1 errors, so it will look like a large number compared to the number of the xxx Diff shares you're submittings. Better number to check is your DH% down below - and yours looks more than fine at 2-ish%.

(BTW, if you want to compare the Diff 1 errors vs a comparable amount of work - look more to the right at "local work")

Enjoy!

Thanks for the explanation. This is my first time looking at this type of interface (my other gear is a stack of singles running off an rPi/raspbian/bfgminer)

The Observer

full member

Activity: 126

Merit: 100

Wow, i sat on the fence about ordering one of these for over a week, was finally going to make the leap of faith today, but after reading about the TONS of problems everyone who bought one has had, i am glad i didnt order, and dont think i will be in the future. Antminers it is i guess.

twib2

sr. member

Activity: 280

Merit: 250

Helperizer

Quote from: Professoruss on January 23, 2014, 05:45:11 PM

Seems as if one of mine is getting quite a few rejected/hw errors. Is this normal?

Those are difficulty 1 errors, so it will look like a large number compared to the number of the xxx Diff shares you're submittings. Better number to check is your DH% down below - and yours looks more than fine at 2-ish%.

(BTW, if you want to compare the Diff 1 errors vs a comparable amount of work - look more to the right at "local work")

Enjoy!

Professoruss

member

Activity: 64

Merit: 10

Seems as if one of mine is getting quite a few rejected/hw errors. Is this normal?

robbcarpdm

member

Activity: 89

Merit: 10

Quote from: stewdk on January 23, 2014, 05:25:59 PM

Quote from: twib2 on January 23, 2014, 05:09:38 PM

Quote from: stewdk on January 23, 2014, 05:06:45 PM

Quote from: robbcarpdm on January 23, 2014, 04:18:34 PM

Cap would be open circuit right not short.

Not if the capacitor was installed backwards. Which it was. More details to follow after I get the blade back online... IF I get it back online. Things are looking better now than a couple of hours ago at least.

Backwards?!? Ouch, their QC doesn't seem to have worked for the Q or the C for the non-early orders.

Reversed polarity. As bass ackwards as it gets.

I am going to guess you simply compared a work board to a non workin board and looked for what was different??

robbcarpdm

member

Activity: 89

Merit: 10

You simply need an instrument to measure the capacitance

Try checking the reference design

A cap is a cap is a cap.....but note there is a big difference between low quality and high quality just like PSUs..... for the SAME reason

mtnminer

sr. member

Activity: 294

Merit: 250

I would suggest check the Mouser online catalog, when I was still in RF Engineer they supplied most of my needs.
http://www.mouser.com/

Mtnminer

Quote from: dozerz on January 23, 2014, 05:28:48 PM

Quote from: twib2 on January 19, 2014, 08:52:56 PM

Quote from: Powell on January 19, 2014, 08:47:51 PM

Was out of town this weekend when I noticed on BTCGuild that one of my units had dropped to 0. I remoted into my desktop here and logged into see it would start to hash and instantly fail. Temps were in the 90* area. I was able to get home 24 hours later after I halted the TP-Link, which did nothing except not let it go out to hash. I took the ENTIRE unit apart and this piece on the second module was sitting on the bottom of the case.

I can see how it was soldered but I have no clue if that is something I can even do. It's that A 997 330 16V right next to Fuse 1. Any help I would love you all.

Also to note there are 4 miners there, including this one, NONE of them had any temp. issues just this one.

Yep, that's the same capacitor that fell off one of my boards - for my unit, the ribbon cable connector was putting too much pressure on it and forced it off. It's easy to resolder, but you have to be generous and make sure you get a really good connection. Also, make sure the orientation is the same as the other comparable ones on the other modules. My module came back to life with the capacitor in place but I never saw temps like that nor 0 hashing. Note that I soldered mine with a bit more play so that the ribbon cable could go around it more easily.

Good luck!

any idea where i can find replacements for these capacitors? i have 2 with snapped legs and googling has brought up nothing.

dozerz

legendary

Activity: 2242

Merit: 1057

Quote from: twib2 on January 19, 2014, 08:52:56 PM

Quote from: Powell on January 19, 2014, 08:47:51 PM

Was out of town this weekend when I noticed on BTCGuild that one of my units had dropped to 0. I remoted into my desktop here and logged into see it would start to hash and instantly fail. Temps were in the 90* area. I was able to get home 24 hours later after I halted the TP-Link, which did nothing except not let it go out to hash. I took the ENTIRE unit apart and this piece on the second module was sitting on the bottom of the case.

I can see how it was soldered but I have no clue if that is something I can even do. It's that A 997 330 16V right next to Fuse 1. Any help I would love you all.

Also to note there are 4 miners there, including this one, NONE of them had any temp. issues just this one.

Yep, that's the same capacitor that fell off one of my boards - for my unit, the ribbon cable connector was putting too much pressure on it and forced it off. It's easy to resolder, but you have to be generous and make sure you get a really good connection. Also, make sure the orientation is the same as the other comparable ones on the other modules. My module came back to life with the capacitor in place but I never saw temps like that nor 0 hashing. Note that I soldered mine with a bit more play so that the ribbon cable could go around it more easily.

Good luck!

any idea where i can find replacements for these capacitors? i have 2 with snapped legs and googling has brought up nothing.

robbcarpdm

member

Activity: 89

Merit: 10

Quote from: stewdk on January 23, 2014, 05:06:45 PM

Quote from: robbcarpdm on January 23, 2014, 04:18:34 PM

Cap would be open circuit right not short.

Not if the capacitor was installed backwards. Which it was. More details to follow after I get the blade back online... IF I get it back online. Things are looking better now than a couple of hours ago at least.

How on earth did you figure out the Cap was backwards.....

I guess it figures given how many have fallen off

Hey found a new source check your email.....not posting yet until it proves out

stewdk

newbie

Activity: 46

Merit: 0

Quote from: twib2 on January 23, 2014, 05:09:38 PM

Quote from: stewdk on January 23, 2014, 05:06:45 PM

Quote from: robbcarpdm on January 23, 2014, 04:18:34 PM

Cap would be open circuit right not short.

Not if the capacitor was installed backwards. Which it was. More details to follow after I get the blade back online... IF I get it back online. Things are looking better now than a couple of hours ago at least.

Backwards?!? Ouch, their QC doesn't seem to have worked for the Q or the C for the non-early orders.

Reversed polarity. As bass ackwards as it gets.

twib2

sr. member

Activity: 280

Merit: 250

Helperizer

Quote from: stewdk on January 23, 2014, 05:06:45 PM

Quote from: robbcarpdm on January 23, 2014, 04:18:34 PM

Cap would be open circuit right not short.

Not if the capacitor was installed backwards. Which it was. More details to follow after I get the blade back online... IF I get it back online. Things are looking better now than a couple of hours ago at least.

Backwards?!? Ouch, their QC doesn't seem to have worked for the Q or the C for the non-early orders.

stewdk

newbie

Activity: 46

Merit: 0

Quote from: robbcarpdm on January 23, 2014, 04:18:34 PM

Cap would be open circuit right not short.

Not if the capacitor was installed backwards. Which it was. More details to follow after I get the blade back online... IF I get it back online. Things are looking better now than a couple of hours ago at least.

dozerz

legendary

Activity: 2242

Merit: 1057

tonight the stock power supply blew, was not overclocked.

on replacing it i now notice at least 5 capacitors have come off the blades.

i replaced the psus and now i get fans power up however the network card is now dead. anyone know how to replace these? assume i can just connect the blades to usb and use cgminer directly?

Gamer67

sr. member

Activity: 294

Merit: 250

тσ ¢σιи σя иσт тσ ¢σιи?

Quote from: robbcarpdm on January 23, 2014, 04:18:34 PM

Well one unit did fine on the 24 hour watch

The other died seems to be a short on the PCB that takes out the old and NEW high end PSU on over current. 12volt to ground short.

Voltage regulator died? Cap would be open circuit right not short.

Red light is on

Glad I canceld the BTC units....

But at least they both hashed 200-220 for almost 24 hrs.

What a shame after waiting this long.....should have gone all Ants cant overclock em but they seem more reliable for cheap crap.

You can OC the ants to around 200.

dannymack

newbie

Activity: 52

Merit: 0

FYI - I ordered mine (1) on the 10th (although they have it down as the 11th)
Received my tracking number.
As of right now, it's in Cincinnati, OH.
Last stop - NY.

Topic: [GROUP BUY WORLDWIDE]BTMine v1 Miner 200GH/s BTC 2.4 - page 23. (Read 97274 times)