We have T17s from late 2019. unreliable and a continual headache.

1) 30% of total hash boards now dead.
2) common temperature sensor failure causes machine to stop hashing
3) if u lose a single asic chip, your board is dead (previous gen, s9 will keep running with less)
4) There is a design flaw where left most board lower corner chip has very little airflow, and since each chip has an individual heatsink... that one corner chip will end up frying, its almost inevitable.

I would only consider them if I had the resources to tackle the failures... Im guessing u have really cheap electricity too?

We are very satisfied with these units.  We have the mid tier M31s.

If anyone knows where to find any of  these units in stock, please share.

I contacted a major repair center out of the states that we use.  They have heard nothing but the usual rumors.

This brings up another topic.  The chinese has leapfrogged us in technology, and we have yet to realize it... in the mainstream its something we talk about happening "possibly" in the future. But looking at the miners: asia is at 7nm (such as  the latest SHA256 miners, and 5nm coming?)... and we can't make our own medical masks. jesus... im afraid.  I feel like we are just a system of finance, laws/patents.

such foundries that are capable of 7nm, and fine tuned to produce at an acceptable yield isn't easy to build.  Intel isn't at 7nm yet are they?

Im happy to share the any information on the the actual mining manufactorer, and mining rig information.  Anything to move away from bitmains.  i just am not sure how my employers would feel about quoting companies we are on friendly terms (that aren't mining manufactorers), thats all.

No.  I got it from a reliable mid size industrial mining outfit that we have some relationship with that is well connected, and they are reliable.  I do not have such connections myself.  Nothing on asicminer value or anything like that... if they got their marketing right, they would post their machine on there to build hype and anticipation.  I just know that they use taiwanese/chinese made chips.

Hoping that some of you have more info.

I've heard from those in the medium/large scale mining business that an American manufacturer is starting up.  Does anyone here know anything about this?  Obvious benefits to that have had reliability issues and unfeasible warentee options.

$100 USD is what they are charging to west coast NA.  And their shipping is actually really freaken quick, (like 7 days to site).  They have a relationship with UPS, but are willing to ship with other vendors.

Thanks guys.

How much is shipping typically to North America? (per unit).  we have an invoice that we paid, but unlike dealing with bitmain, shipping was not calculated... and its like a huge hassle to send money order internationally.

Dealing with the team out of telegram (linked from official site microbt.com) is a unnerving....  Ill let u know how it goes

what you are saying is contradictory.

If it is asking for a password, it is encrypted.  The rar file can be encrypted in a way to show the contents, if that is where your confusion is.  Bottom line, treat it like a lottery ticket:  brute force it on a computer u don't use and leave it....  maybe it will come up with the pwd within your lifetime.  There are ways of optimizing, maybe multi core brute force, or maybe some type of GPU compute brute force.  but those increases 2x-20x? are not that much compared to potential time it will take.

Can someone do a sanity check for me? I don't want to get scammed.

www.microbt.com is their website.  Clicking on Product brings you onto www.whatsminer.com.  Are these legit sites?

There is not much inventory officially on the website, but the telegram link on www.whatsminer.com will lead you to https://t.me/whatsminercommunity with actually very helpful technical support staff (with admin tag), and Vincent, the VP of sales (with owner tag).  And if you intend to purchase in bulk, there is inventory...  Payment by USD is payed to a company in Hong Kong called INCHIGLE TECHNOLOGY HONGKONG LIMITED
.

Thanks for the post guys. 

This is what I got from microbt.com support and also from their telegram support (linked directly from microbt.com):

1) Warentee is 365 Days for the M30/M31 series, not 180 (conflicting information from microbt website)
2) They pay for shipping both ways for repair
3) If you diagnose the problem with a part, the first repair attempt they will send you the part.  If that does not work, u must send your unit back to repair centre, a repair center is available in the USA.
4) somewhat broken english: they will send you a machine (refurbished or new) when you send yours back?

It sounds too good to be true?

This is pretty normal... such a waste of time.

We have the full experience of S17/T17 series failures as outlined in https://bitcointalk.org/index.php?topic=5217949.0 and https://cointelegraph.com/news/samson-mow-bitmain-s17-t17-antminer-has-high-failure-rate

Our experience is about a 15% failure rate. Some of the warenteed units suffer from the same problems and have since failed.   For those of you that would like to know about bitmain warentee procedure, please let me know.  We are experts now. ill share my knowledge.

It is time to choose the devil you don't know... As for alternative units, there is much less information, so I guess I will ask the question:

1) What is your experience with the Whatsminer M3x units?
2) What is your experience with the Whatsminer warentee process, and can you briefly describe the process?  From their website, it looks like u need permission via tech support before any warentee work.  no details as to entire units need to be sent back, or if they accept individual parts... and who pays for them.

Cheers,

Thank you for your responses to you both.  And thank you mikey for confirming their physical arrangement, as I am not on site.

I had assumed that on the control board, chains were logically in order (0,1,2 for the new generation of machines) from left to right. HOWEVER, I had installed over a hundred units that we purchased pre-owned, and their data cables were criss-crossed and their arrangement was very much random.

The units in question were purchased new from bitmain. So in your experience does bitmain always plug hash boards left to right, so that 0=left, 1=middle, 2=right?

Cheers.

I have a dead hashboard on some T17 units that I would like to pull.  Unfortunately, the red status lights are hidden by the metal housing.  Is there a way to know which hashboard is failing in the unit based on logs or other information?  I am not on site and have to rely on people that are limited on techy skills so I want to make it straight forward.

Thanks guys.

Umm.. is Bitmain only accept S17s for RMA?  All of the other options for all other miner types dissapeered.  Can someone please verify?  Is it only me?

Which machines are you running? Are their flagship S17s also experiencing this problem?

S9s don't have this game-over problem with sensor errors in later firmware... wtf is up with bitmain, they are literally creating problems for miners.

---

Adding a fourth problem:


Remedy is to reboot the machine remotely, thus far.

I've never disassembled the T3, are you telling me that the hash chips are user replacable?  Or is this another type of chip, that u were able to diagnose ?  Are you able to bring in another hash board from another unit that is known good to see if it is indeed the hashboard?

shipment of 30 T17 42TH

3 problems units:

1) Wont detect hashboard from new, mines with 2
2) After a month, temperature sensor problem and entire machine wont hash
3) Solid Red and Green light

If anyone has solutions to 1 and 3  please reply.