Bitcoin Forum
September 18, 2018, 06:24:05 PM *
News: Latest stable version of Bitcoin Core: 0.16.2  [Torrent].
 
  Home Help Search Donate Login Register  
  Show Posts
Pages: [1] 2 3 »
1  Bitcoin / Hardware / (Review/Guide) Hotmine X6 7.4 Th/s, 1150 W Bitcoin (SHA-256) ASIC miner on: September 16, 2018, 10:03:00 PM
(Review/Guide) Hotmine X6 7.4 Th/s, 1150 W Bitcoin (SHA-256) ASIC miner


Picture copyright (c) Hotmine.

1) General information, other items needed
2) Unpacking
3) Overview
4) Installation
5) Configuration
6) Performance test
7) Conclusion
8] How to order


Last updated in: September 17, 2018.

Nicely formatted version (September 17, 2018) is available for download here (Mega.nz cloud service):
https://mega.nz/#!YsN2CazB!xI_TDWhUQmmijix2z-2vZPdZ_DDzNvsKVsqueVPKPak

1) General information, other items needed
(top)
Hotmine X6 is a Bitcoin (SHA-256) ASIC miner using 16nm ASIC chip technology,
manufactured by Hotmine (headquarters in Kiev, Ukraine).

Hotmine X6 is a standalone miner with a built-in controller unit.

The advertised nominal hashrate for miner is 6.4 - 8.6 Th/s with a nominal power consumption of 980 - 1200 Watts.
It weights 4.1 kg and outer dimensions are 340mm(L) x 145mm(W) x 155mm(H).

Technical specs data sheet: https://mega.nz/#!QkFlgKQJ!yIcatHHXHcN52P8hot-xB_NfztIbWxgn5DfJsFC9EHo

Hotmine was founded in 2013 and in 2016 they grew bigger, as they became a Bitfury partner
and they started making boiler miners and Bitfury 16nm based upgrade kits (X5, X6) for Antminer S5.
They have since brought more miner models in to the market, and most of them are fully assembled units.

Hotmine X6 is using the same Bitfury BF16BTC8162 16nm ASIC chip as did the previous model (X5),
but the chip quantity is bigger and the total hash rate is more than twice the X5.

Hotmine:
http://hotmine.io

Technical specifications:
Code:
Hotmine X6

Hash rate: 6.4 - 8.6 Th/s
Power consumption: 980 - 1200 W
Power efficiency: 1.4 - 1.5 J per Gh/s
DC voltage input: 12VDC
ASIC chip type: Bitfury BF16BTC8162 (16nm SHA-256 ASIC chip)
ASIC chip quantity per unit (miner): 92 chips
Number of hash boards per unit: 2 hash boards
Cooling: 2x 120mm x 38mm 12VDC 2.4A fan, JSL JDH1238B
(front and back, in a push-pull configuration, rotating max. about in the 6000rpm area).
Weight: 4.1 kg
Dimensions: 340mm(L) x 145mm(W) x 155mm(H)

Other items needed:
  • A server grade power supply with at least 6x PCI-E 6-pin connectors, everyone with a dedicated cable, at least 18AWG wires.
    There is no official custom power supply unit, but I would recommend using at least HP DPS-1200 FB A 1200 Watt server power supply
    (with a breakout board & power cables -kit) with this X6 miner.
  • C13 power cord suitable to your country's electrical socket
  • Ethernet cable to go to your router/switch device
  • Computer to set initial pool and configuration settings.

2) Unpacking
(top)
You can order a miner from Hotmine by ordering at their website or by contacting them via Telegram.
The first option is recommended.
I ordered one, after which I paid the amount in BTC.
The conversion from USD to BTC was done by the payment system and it was up to date.

The best option for me was to ship the miner from Ukraine to Finland using Ukrposhta, which is the national postal service in Ukraine.

Inside the cardboard box I found out that the miner was wrapped good in a bubble wrap.
On top of that the miner was also protected by custom shaped protecting foam material.
The packaging is tight and there is no excess space inside the cardboard box.
This kind of packaging design is pretty much the market standard these days.


Packaging material. Click to show a high resolution image. Picture taken by HagssFIN.

3) Overview (top)
Here is a set of pictures showing some details of the Hotmine X6 miner.

Click to see a high resolution image. Pictures taken by HagssFIN.




4) Installation (top)
The installation process for the Hotmine X6 is very similar to the Antminer S5,
which is a old miner model from Bitmain (the Hotmine X6 upgrade kit is compatible with the Antminer S5 parts).

First you need to connect the Ethernet cable to your miner and the other end to the router/switch device.

And then you need a server grade power supply preferably with at least 1200W power capacity (for example HP DPS 1200 FB A).
You need to install all six pieces PCI-E 6-pin power cables to the power headers found at the top side of the miner.
Three cables per hash board.


Power connections. Click to show a high resolution image. Picture taken by HagssFIN.

When the initial setup is ready, power on the miner and start by finding the miner IP address,
as the Hotmine X6 miner comes with DHCP as the default mode in the network settings.
This means that the miner will automatically get an IP address from the router device DHCP IP address pool.

You can find out what is the miner IP address by checking it at your router web configuration page,
or by using any suitable network software available (for example Wireshark).

When you have found out what is the miner IP address, you are ready for the next step, which is Configuration.

5) Configuration (top)
You first need to open your web browser and fill the miner IP address in the browser address field.
Then you press enter. It will ask you for the user credentials.
The default username is root and the default password is also root.

After that it is time to setup your mining pool settings.
Click and go to the 'Miner Configuration'.

You can put the pool stratum address, username and password for three different pools in a priority order: Pool 1 > Pool 2 > Pool 3.

This miner does not use AsicBoost and you can choose any pool that you like to use.

After you are ready with the pool settings, press 'Save&Apply'.
This saves and applies the settings and also reboots the mining process.

The user interface is pretty much the same as we have seen used with the Antminer S5
and the firmware is based on the same OpenWrt firmware design as the Antminer S5.

Here is a bunch of screenshot images showing a detailed view of the Hotmine X6 miner web configuration page features -->





6) Performance test (top)
After all the miner settings were done properly, it was time to test the miner and see how it starts running,
and also how good is the miner performance.

The average hash rate was in the 7.4 Th/s area, so the hash rate in the advertised level.
It is pretty easy to make a miner match the advertised specs, when you give such a wide area for the nominal hash rate.
I wish Hotmine would be more specific with their technical specifications.

In the next image you can see the miner status page view after the miner has been running for a good amount of time, almost 2 days.


Miner status page. Click to show a high resolution image.

After this it is time to move forward and measure the power consumption at wall.

The power measurement was done with Perel E305EM6-G energy meter as usual,
and you can find the technical specifications data sheet here:
https://www.perel.eu/downloads/22/e305em6e305em6ggbnlfresdptpl.pdf


Perel E305EM6-G. Click to show a high resolution image. Picture taken by HagssFIN.


Power measurement. Click to show a high resolution image. Picture taken by HagssFIN.

Stable result for the power consumption (at wall) was 1150 W,
when the hash rate was averaging in the 7.4 Th/s area.

The power supply that I used in this test was Bitmain APW3++ 1600W power supply.

With these power measurement results we can calculate the power efficiency at wall.

1150 / 7400 = 1.5541 J  per  Gh/s.

This is slightly more than the worst value for the advertised power efficiency (6.4 Th/s and 980 Watts --> 1.5312 J per Gh/s).

The power efficiency at wall of course depends on the power supply model used, and it could be that Hotmine used a better power efficiency power supply than the APW3++ power supply.

7) Conclusion (top)
I was very happy when I first found out Hotmine and their X5 upgrade kit.
It was a solid piece to upgrade your old Antminer.

This following model, Hotmine X6, continues on the same path and it is a solid miner.
The build quality with my unit was good.

The cooling in this miner is very powerful and effective,
but this miner is the 1.1kW area and it produces a lot of heat.
All this heat means that in most environments the cooling fans must operate at a high speed.
So the cooling fan noise makes it an unattractive choice for home mining operation, when the defaul settings are used.
Thankfully you can underclock the miner and also control the fan speed manually.
This way you can modify this miner to be used in home environment.

I think that power efficiency -wise the Hotmine X6 miner is close to the same power efficiency level as the Avalonminer 741 (Canaan Creative) and the Ebit E9 Plus (Zhejiang Ebang Communication).
The current mining competition is quite hard, even with the newest gear ( <0.70 J per Gh/s).
So you will notice, that with this X6 miner you will need close to free electricity if you want to make profit.

The Hotmine X6 is a quality item, but unfortunately a new, more efficient model would be needed in this current situation.

If you got any questions, feel free to drop them in this thread.
I will try to give my best answer.

8] How to order (top)
I highly recommend to only use their official webshop (http://hotmine.io) or contact their official Telegram account (@HotmineSales),
so that you can avoid any possible scamming attempts.

Hotmine: http://hotmine.io

2  Economy / Computer hardware / [WTS] [EU] Bitmain Antminer E3 on: September 12, 2018, 08:20:43 PM
Hello gents and ladies,
I'm selling one Bitmain Antminer E3 miner (Ethash algorithm).

Specs: https://file11.bitmain.com/shop-product/firmware/Antminer%20E3/Manual/00720180813164106199mreQ2Hw006B9/E3%20Server%20Installation%20Guide.pdf

The miner is in good condition and there is four months of warranty time left.

I'm asking 0.13 BTC incl. shipping.

I'm located in Finland (EU area).

I accept btc, ltc, eth.

Escrow can be used if wanted.
3  Economy / Computer hardware / [locked..] Hotmine X5 3.3 Th/s Bitcoin (SHA-256) miner, faulty control board/BB on: September 01, 2018, 11:16:24 AM
EDIT: This has now been given away to a local guy. This thread is now closed and locked.

Hello guys,

I'm giving away this Hotmine X5 miner.

Hash boards are in working condition.

Hotmine guys have tested the control board (red pcb) and they said it is ok.
So most likely you only need a new Beaglebone Black board (black pcb).
But I'm giving this away as a broken device.

I'm located in Finland (EU area).

I'm only asking the shipping cost as a price for this.


link:http://i66.tinypic.com/30c0h2s.jpg


link:http://i63.tinypic.com/8wi7er.jpg


link:http://i66.tinypic.com/kvwcj.jpg
4  Alternate cryptocurrencies / Mining (Altcoins) / Fusion Silicon L61 - 860 Mh/s, 1160 W Litecoin miner on: August 28, 2018, 04:59:27 PM
Hello guys,
BW.com miner manufacturing department is now separated and there is a new company called Fusion Silicon. Cassie Cai, who is the director of international affairs for Fusion Silicon, said that the new company is not related to the current BW.com company.

Fusion Silicon has a new Litecoin ASIC chip and a new Litecoin miner coming to the market and that is the main reason I started this new thread.

I have been in talks with Cassie about a possibility to do a miner review,
but it is not sure yet.

Cassie mentioned me earlier that they would launch this new miner this month.

Fusion Silicon L61 - 860 Mh/s, 1160 W Litecoin miner
• Hash rate: 860 Mh/s  +-5%
• Power consumption: 1160W  +  10%  (FS power supply unit –1600 Watt AC/DC efficiency  93
• Power efficiency: 1.349J/MH  +  10%  (Wall AC/DC  efficiency 93
• Nominal voltage: 12  ~  13 VDC
• Case dimension: 340mm  (L)  *  130mm  (W)  *  198mm  (H)
• Weight  (Packaging is inclusive):  xx  kg
• Working temperature: 0℃ ~ 40℃
• Working humidity: 5%RH  ~  95% RH
• Network: Ethernet
• Noise:xx  db 25C) 25℃)

• Method to connect power supply unit:3 PCIE connectors in each hash board are required to connect with power supply unit. It is recommended to use independent power supply unit to supply the miner. Under the circumstances of non-independent power supply,3 hash boards can connect to various PSUs respectively with only one PSU for one hash board and ensuring the hash board to be power on.

Cassie sent me this image and a technical specs data sheet.



Here is the technical specs data sheet: https://mega.nz/#!gkNzlCTA!S1HcDRiALXYXTHNi3n3jYDZqRA9N2zpakfosIYv08oc

For any inquiries, I recommend to contact Cassie Cai (cassie.cai@fusionsilicon.com).
5  Economy / Computer hardware / [sold!] 2x AvalonMiner 821 kit on: August 26, 2018, 12:04:03 PM
EDIT: And this is now sold!

EDIT: Reserved to a buyer candidate.

I'm selling two AvalonMiner 821 units with psu's and control gear.

My asking price for the kit is 700 EUR incl. shipping.

I sell this gear only together as a kit.

I'm located in Finland.

I accept btc, ltc, bank transfer. I accept using the escrow if wanted.

PM me for more.
6  Economy / Computer hardware / [sold!] Zotac GTX 1080 Ti Mini on: August 08, 2018, 07:30:14 PM
edit: This is now sold to a local buyer.

I'm selling one Zotac GTX 1080 Ti Mini graphics card.

I'm asking for 500 EUR incl. shipping.

Over four years warranty left (the product is registered).

I'm located in Finland.

I accept bank transfer or btc or ltc for payment.
Escrow is accepted (OgNasty for example).

Pm me for more. Smiley
7  Economy / Computer hardware / [sold!] Bitmain Antminer T9+ 10.5Th/s with a 1400W server power supply unit. on: June 11, 2018, 05:19:32 PM
Edit2: This is now sold to miguelik.

Edit: this is now reserved to a potential buyer.

Hello ladies and gents, I'm selling following hardware..

Bitmain Antminer T9+, 10.5 Th/s  Bitcoin (SHA-256 algorithm) ASIC miner
This deal is including one Bitmain Antminer T9+ miner with a 1400W server power supply unit.
No cables (power, ethernet..) are included.

This miner is hashing stable with zero issues.

There is about five months of Bitmain warranty time left.

Price (including shipping) : 300 EUR

Location: Finland (EU area)

You can pay me directly with BTC or we can use a escrow service (trusted member like OgNasty is needed for the escrow).
The escrow service fee is at buyer's expense. I also accept other cryptos or bank wire transfer.

You can see the Antminer T9+ 10.5Th/s  technical specifications and other information in this user guide -->
https://mega.nz/#!04cUmIaQ!MWUFvYTrQOhKg8m4IOkxGM_OUVMkB34H66lzt1xVzM8

No need to pay the VAT tax inside the EU area, because I have already paid it here in Finland.  Smiley

If you are interested in buying this or you have any question you would like to ask, please post here in this thread or send me a PM message.
8  Economy / Computer hardware / [sold!] Bitmain Antminer L3+ 504Mh/s with the Bitmain APW3++ power supply. on: May 11, 2018, 01:41:47 AM
EDIT2: This is now sold to username Tupsu. This sales thread is now closed and locked.

EDIT: This is reserved to a buyer at the moment.

Hello ladies and gents, I'm selling following hardware..


Bitmain Antminer L3+ 504Mh/s Litecoin (Scrypt algorithm) ASIC miner
This includes one unit Bitmain Antminer L3+ miner with the Bitmain APW3++ power supply unit.
You can run this L3+ miner with the APW3++ psu both in 110/120V  and  220/230V mains voltage systems.
No power cord, no ethernet cable is included.

This miner is hashing stable with zero issues.

There is a plenty of Bitmain warranty time left for this.
The warranty time is 180 days after shipping and the warranty is valid until October 14, 2018.

This is available right now.

Price (including shipping) : 660 EUR

Location: Finland (EU area)

BTC, LTC or bank wire transfer accepted.

You can pay me directly or we can use a escrow service (trusted member like OgNasty is needed for the escrow).
The escrow service fee is at buyer's expense.
I can also take a LTC or other payment, ask me for more.

You can see the Antminer L3+  technical specifications and other information in this user guide -->
https://file.bitmain.com/shop-bitmain/download/AntMiner%20L3%2B%20Installation%20Guide.pdf

Here is a picture showing the miner and psu-->
https://i.imgur.com/0x5wmun.jpg

No need to pay the VAT tax inside the EU area, because I have already paid it here in Finland.

If you are interested in buying this or you have any question you would like to ask, please post here in this thread or send me a PM message.
9  Economy / Computer hardware / [sold!] Bitmain Antminer T9+ 10.5Th/s with a 1400W server power supply unit. on: May 07, 2018, 02:32:26 PM
EDIT2: And this is now sold!  Smiley
The thread is now closed and locked.

EDIT: This is reserved to a possible buyer at the moment.


Hello ladies and gents, I'm selling following hardware..

Bitmain Antminer T9+, 10.5 Th/s  Bitcoin (SHA-256 algorithm) ASIC miner
This includes one unit Bitmain Antminer T9+ miner with the 1400W server power supply unit.
No cables (power, ethernet..) are included.

This miner is hashing stable with zero issues.

There is plenty of Bitmain warranty time left.
The warranty time is 180 days after shipping and the warranty is valid until September 26, 2018.

This is available right now.

Price (including shipping) : 0.09 BTC

Location: Finland (EU area)

You can pay me directly with BTC or we can use a escrow service (trusted member like OgNasty is needed for the escrow).
The escrow service fee is at buyer's expense.

You can see the Antminer T9+ 10.5Th/s  technical specifications and other information in this user guide -->
https://mega.nz/#!04cUmIaQ!MWUFvYTrQOhKg8m4IOkxGM_OUVMkB34H66lzt1xVzM8

Here is a picture showing the miner and psu-->
https://mega.nz/#!4sFTTZBQ!Yh-6yPse9SMhE-zIBig7I2_oh_jd3pqdpFHaFuuP_vM

No need to pay the VAT tax inside the EU area, because I have already paid it here in Finland.  Smiley

If you are interested in buying this or you have any question you would like to ask, please post here in this thread or send me a PM message.
10  Alternate cryptocurrencies / Mining (Altcoins) / (Review/Guide) Antminer A3 815 Gh/s, 1275W Siacoin [Blake (2b)] ASIC miner on: April 18, 2018, 01:00:05 AM
(Review/Guide) Antminer A3 815 Gh/s, 1275W Siacoin [Blake (2b)] ASIC miner


Click to show a high resolution image. Picture copyright (c) Bitmain.

1) General information, other items needed
2) Unpacking
3) Overview
4) Installation
5) Configuration
6) Performance test
7) Conclusion
8] How to order


Last updated in: April 18, 2018.

Steemit blogging website:
https://steemit.com/review/@hagssfin/review-guide-antminer-a3-815-gh-s-1275w-siacoin-blake-2b-asic-miner

Nicely formatted version (April 18, 2018) is available for download here (Mega.nz cloud service):
https://mega.nz/#!F1FTDKTY!mPWpDpJS7XQU4fRYxTQpobBm0Rv7jQORX4zaLhhSHBk

1) General information, other items needed
(top)
Antminer A3 is a Siacoin [Blake (2b)] ASIC miner using 28nm ASIC chip technology,
manufactured by Bitmain Technologies (headquarters in Beijing, China).

Antminer A3 is a standalone miner with a built-in controller unit.

The advertised nominal hashrate for miner is 815 Gh/s with a nominal power consumption of 1275 Watts.
It weights 4.2 kg and outer dimensions are 321mm(L) x 125mm(W) x 208mm(H).

Bitmain has slowly moved into making miners for lots of different mining algorithms and therefore for many different coins,
and this is their first ASIC miner that they have manufactured for the Blake (2b) algorithm.
At the moment Siacoin is the most popular coin among the Blake (2b) algo cryptocurrencies.

Bitmain:
www.bitmain.com

Technical specifications:
Code:
Antminer A3

Hash rate: 815 Gh/s
Power consumption: 1323W +7% (220 VAC Power @ 25 ℃, 93% conversion efficiency with APW3++ power supply)
Power efficiency: 1.56 mJ/MH +7% (220 VAC Power @ 25 ℃, 93% conversion efficiency with APW3++ power supply)
DC voltage input: 11.60 - 13.00VDC
ASIC chip type: BM1720 [28nm Blake (2b) ASIC chip]
ASIC chip quantity per unit (miner): 180 chips
Number of hash boards per unit: 3 hash boards
Cooling: 2x 120mm x 38mm 12VDC 1.65A fan; manufacturer & model: Nidec W12E12BS11B5-57
(front and back, in a push-pull configuration, rotating max. about in the 6000rpm area).
Weight: 4.2 kg
Dimensions: 321mm(L) x 125mm(W) x 208mm(H)

Other items needed:
  • A server grade power supply with at least 10x PCI-E 6-pin connectors, everyone with a dedicated cable, at least 18AWG wires.
    Bitmain APW3++ is the official customs power supply, but for example any common brand server grade power supply with at least 1400W
    power capacity will do the job just fine as well.
  • C13 power cord suitable to your country's electrical socket
  • Ethernet cable to go to your router/switch device
  • Computer to set initial pool and configuration settings.


2) Unpacking
(top)
Bitmain is usually quite good at keeping their promised delivery date schedule
and there was no schedule issues with this A3 unit order delivery.

When I buy hardware from Bitmain web shop, Fedex is usually the cheapest courier choice for me
and it only took about five working days to deliver this A3 miner from China to Finland.

Inside the cardboard box you can find out that the miner is wrapped in a bubble wrap
and there is another protection layer as it is also protected by custom shaped protecting foam material.
The packaging is nice and tight, there is no extra room inside the cardboard box, which is a good thing.
This kind of packaging design is good and it makes very little chance for possible damages during the shipping.

I had a APW3++ power supply unit ready for this unit as I had bought it earlier,
so only the miner was delivered to me this time.


Packaging material. Click to show a high resolution image. Picture taken by HagssFIN.

3) Overview (top)
Here is a nice set of pictures showing a detailed view on the A3 miner.

Click to see a high resolution image. Pictures taken by HagssFIN.







 

4) Installation (top)
The installation process is very simple and straight forward with the A3,
especially if you are already familiar using other miner devices manufactured by Bitmain.

You need to connect the Ethernet cable to your miner and the other end to the router/switch device.

And then you need a server grade power supply preferably with at least 1400W power capacity.
You need to install all ten pieces PCI-E 6-pin power cables to the power headers found at the top side of the miner.
One cable for the controller board and nine cables for the hash boards.

When the initial setup is ready, power on the miner and start by finding the miner IP address,
as the A3 miner comes with DHCP as the default mode in the network settings.
This means it will automatically get an IP address from the router device DHCP IP address pool.

You can find out what is the miner IP address by checking it at your router web configuration page,
or by using the IP Report tool that Bitmain provides at their website,
or by using any other IP address scanner software available.

When you know the miner IP address, you are ready for the next step, Configuration.


Power connections. Click to show a high resolution image. Picture taken by HagssFIN.


5) Configuration (top)
What you do first it that you open a web browser, enter the miner IP address in the browser address field and press enter.
It will ask you for the user credentials.
The default username is root and the default password is also root.

After that it is time to setup your mining pool settings.
Click and go to the 'Miner Configuration'.

You can put the pool stratum address, username and password for three different pools in a priority order: Pool 1 > Pool 2 > Pool 3.

After you are ready with the pool settings, press 'Save&Apply'.
This saves and applies the settings and also reboots the mining process.

You can also check the official user guide for both install and configuration instructions.

The official Antminer A3 user guide can be found here at Bitmain.com:
https://shop.bitmain.com/support.htm

There are also some good tutorial videos available at YouTube website.

Antminer A3 tutorial video by Cryptocrane:
https://www.youtube.com/watch?v=1i3p3x0P31U

The user interface is the exact same as we have used to see in other Bitmain miners in the past,
as it is based on their custom OpenWrt firmware design.

Here is a bunch of screenshot images showing a detailed view on the Antminer A3 web configuration page features.







6) Performance test (top)
When all the miner setting were done properly, it was time to test the miner and see how it starts running and how is the performance.

The average hash rate was in the 830 Gh/s area, so the hash rate was actually even slightly better than advertised.
It is a good idea to slightly underestimate the nominal hashrate, instead of overestimating it.
This way you will keep the customers happy and avoid disappointing them in case some units are running at a little lower hash rate.

Here is the miner status page view after the miner has been running for one hour.


Miner status page. Click to show a high resolution image.

Then it was naturally time to move forward and measure the power consumption at wall.

The power measurement was done with Perel E305EM6-G energy meter,
the technical specifications data sheet can be found here:
https://www.perel.eu/downloads/22/e305em6e305em6ggbnlfresdptpl.pdf


Perel E305EM6-G. Click to show a high resolution image. Picture taken by HagssFIN.


Power measurement. Click to show a high resolution image. Picture taken by HagssFIN.

Stable result for the power consumption (at wall) was 1369 W,
when the hash rate was averaging in the 830 Gh/s area.

The power supply used in this test was Bitmain APW3++ 1600W power supply.

With these results we can calculate the power efficiency at wall.

1369 / 830000 = 1.6494 mJ  per  Mh/s.

Bitmain says that the power efficiency is  1.56 mJ per MH/s (+7%),
so it is quite close to the spec and within the advertised power efficiency area.

7) Conclusion (top)
I've own multiple different Antminers in the past and I was interested to try this new A3 miner as well.
Bitmain is really trying to spread all over the cryptocurrency miners industry to have a close to monopoly position,
as they are pretty much constantly releasing new hardware for different mining algorithms.

All in all, I have to say that the A3 does it's job just as advertised and there was no issues in the setup or while operating it.

Cooling design is done in the same fashion as with other Antminers in the past.
There are invidual heat sinks installed on the ASIC chips
and two high rev cooling fans installed in both ends of the steel tube case.
It is a push-pull configuration and it provides a huge airflow through the steel tube case.

This means that the cooling is quite effective and it produces a lot of noise.

The noise makes it an unattractive choice for home mining operation.

It remains to be seen that how well will Siacoin and other Blake 2b algorithm coins eventually withstand
the huge amount of hash rate that has suddenly entered in the network after these ASIC
miners became available in the market.

If you got any questions, feel free to drop them in this thread.
I will try to give my best answer.

8] How to order (top)
You can make the order by visiting their web shop online at their website, when they have a batch open for sales.
See more details at the official website.

Bitmain usually announces beforehand about their sales by posting an announcement at their Twitter and Facebook page.

Bitmain: www.bitmain.com

It is highly recommend to only use their official webshop, so that you can avoid any possible scamming attempt.
11  Economy / Computer hardware / [sold] WhatsMiner M3X 12.0Th/s Bitcoin miner with built-in power supply unit on: April 17, 2018, 12:01:16 AM
EDIT2: This is now sold, the thread is closed and locked.

EDIT: This is now reserved to a buyer, I'm waiting for a confirmed payment.

Hello ladies and gents,
I'm selling one WhatsMiner M3X 12.0Th/s miner with the built-in power supply unit WhatsPower P5.

Available right now.

The miner has been working stable at 12.0 Th/s  without any pauses.
It is able to mine Bitcoin and other SHA-256d algorithm cryptocurrencies.
This is the same unit, which I did a review about recently.
I'm selling, because I have limited space for my miners.

No power cord or ethernet cable is included.

Price (incl. shipping): 0.08 BTC

Location: Finland (EU area)

You can pay me directly with BTC or we can use a escrow service (OgNasty for example).
Escrow fee is at buyer's expense.

See more information and pictures about this WhatsMiner M3X unit in my review thread:
https://bitcointalk.org/index.php?topic=3322593

12  Bitcoin / Hardware / (Review/Guide) WhatsMiner M3X 12.0 Th/s, 2100W Bitcoin (SHA-256) ASIC miner on: April 14, 2018, 10:55:33 PM
(Review/Guide) WhatsMiner M3X 12.0 Th/s, 2100W Bitcoin (SHA-256) ASIC miner


Click to show a high resolution image. Picture copyright (c) WhatsMiner.

1) General information, other items needed
2) Unpacking
3) Overview
4) Installation
5) Configuration
6) Performance test
7) Conclusion
8] How to order


Last updated in: April 15, 2018.

Steemit blogging website:
https://steemit.com/review/@hagssfin/review-guide-whatsminer-m3x-12-0-th-s-2100w-bitcoin-sha-256-asic-miner

Nicely formatted version (April 15, 2018) is available for download here (Mega.nz cloud service):
https://mega.nz/#!5hdBFSZb!vy4Dcf0jl0bCqlJnJEUiPMV88D29ySa1Ct0COLWicpg

1) General information, other items needed
(top)
WhatsMiner M3X is a Bitcoin (SHA-256) ASIC miner using 28nm ASIC chip technology, manufactured by WhatsMiner (headquarters in Shenzhen, China).
Their official overseas distribution arm is called Team Pangolinminer. This unit was received as an sample unit from Team Pangolinminer for this review. (www.pangolinminer.com)

WhatsMiner M3X is a standalone miner with a built-in controller board and you don't need a separate controller unit to run it.

What is new in this miner compared to the previous model (M3), is that this one comes with a 2100W built-in power supply unit.
The power supply unit is called WhatsPower P5.
You need 180-240 V mains voltage to be able to run it,
it won't work in a 110-120V mains voltage system.

This built-in power supply unit design kind of reminds me of the AvalonMiner 761 model,
which was sold in mainland China and South Korea only.

The technology is pretty much the same as in the WhatsMiner M3, but there is a small improvement in the miner performance.

According to the official technical specifications, the nominal hashrate is from 12.0 to 13.0 Th/s with a nominal power consumption of 1800-2100 Watts.

It weights 7.15 kg and outer dimensions are 440mm x 200mm x 300mm.

Technical specifications:
Code:
WhatsMiner M3X

Hash rate: 12.0 Th/s
Power consumption: 2100W
Power efficiency: 0.175 J / Gh/s
AC voltage input for the power supply: 180 - 240 VAC
DC voltage input for the miner: 12 VDC
ASIC chip type: SMTI 1700 (28nm SHA-256 ASIC chip)
ASIC chip quantity per unit (miner): 189 chips
Number of hash boards per unit: 3 hash boards
Cooling: 2x 120mm x 38mm 12VDC 2.8A fan, model: KZ12038B012X (front and back, in a push-pull configuration).
Weight: 7.15 kg
Dimensions: 440mm x 200mm x 300mm

Other items needed:
  • C13 power cord suitable to your country's electrical socket. Make sure that it is a good quality one and able to handle the over 2kW load
  • Ethernet cable to go to your router/switch
  • Computer to set initial pool and configuration settings.

2) Unpacking (top)
Team Pangolinminer handles their order system fast and smooth, and keeps you updated about your order status.
This miner was sent from Hong Kong in April 9 and it arrived in Finland in April 12.
It took only three working days, so we can see that using DHL or other fast courier service is a great idea for long distance shipping.

The packaging was simply great and robust.
There is a custom carved styrofoam which protects the miner inside a plastic bag from impacts.
There is no extra space inside the cardboard box which is good, because you don't want the goods to move inside the box during shipping.

This packaging design is good, as it makes very little room for possible damages during the shipping.

Inside the cardboard box you can find the miner with the built-in power supply unit and also a C13 to Type I power cord (3x1.5mm2 wiring, good amp rating).

They say that pictures say more than 1000 words, so here we go:


Packaging material. Click to show a high resolution image. Pictures taken by HagssFIN.

3) Overview (top)
Here is a nice set of pictures showing the miner and the built-in power supply unit.








Click to show a high resolution image. Pictures taken by HagssFIN.


Here is also an additional set of pictures taken by the Team Pangolinminer.



Click to show a high resolution image. Picture copyright (c) WhatsMiner / Team Pangolinminer.

4) Installation (top)
The installation process is done in most simple way as possible.
Since there is now a built-in power supply unit, you don't have to install the power supply yourself.

You need to connect the Ethernet cable to your miner and the other end to the router or switch device.

And then you need a good quality C13 power cord which fits into your electrical power socket.
Please make sure that it is able to handle the over 2kW power load '24/7/365'.

The miner network settings is to the DHCP mode as default and it will acquire an IP address automatically.
You can find out the IP address fairly easy by accessing your router configuration page IP address list or by using a specific tool program for it.

Team Pangolinminer also offers an official IP found program called "WhatsMinerTool" at their website.
This way you can use the miner's IP found function and figure out the miner IP address.

WhatsMinerTool User Guide & Software:
https://drive.google.com/open?id=1XthbZPFc0S-FvMi9MqpLOJlUaFAc4auW

Knowing the miner IP address makes the next Configuration chapter possible.


If you want, you can also follow these tutorial videos for more help.

WhatsMiner M3X introduction video
https://www.youtube.com/watch?v=86govBilEA0

WhatsMiner M3 tutorial video
https://www.youtube.com/watch?v=e-Cj3QckFnI


You can also find support documentation and other downloadable material at the Team Pangolinminer website.

Whatsminer M3 User Guides & Solutions
https://pangolinminer.zendesk.com/hc/en-us/articles/360001263394-Whatsminer-M3-User-Guides-Solutions

5) Configuration (top)
First you need to go the miner IP address with your web browser.
Then you login to the configuration page.
Username is root and the password is root by default.


Login screen. Click to show a high resolution image.

If your miner default language is set to Chinese, you can easily change it to English.


Setting the language at system properties page. Click to show a high resolution image.

Now it is time to setup mining pool settings.
Go through menus and find the Cgminer configuration page.
Click the drop down list and you are able to setup a custom pool address of your choice.
You can set this miner to mine any SHA-256d algorithm based cryptocurrency in any mining pool of your choice.


Cgminer configuration page. Click to show a high resolution image.

You can put settings for the pool address, username and password for three different pools in a priority order from 1 to 3.
Miner hash board frequency and cooling fan settings are automatic, there is no possibility to have custom settings.

After you have ready with the settings, press 'Save & Apply'.

Then go through menus and click 'Reboot' to reboot the miner.

The startup process for the miner takes a long time as it goes slowly through hash board frequencies,
much like the autotune frequency model S9 miners also do.

So you need patience when you start up this machine and there is no need to be worried even though the numbers seem wrong at first.

After the startup process is ready, it restarts the Cgminer and after that the miner really starts to do the mining work
and you will see it working between 12.0 - 13.0 Th/s hash rate.


Miner status page. Click to show a high resolution image.

There are also pages for the system log and Cgminer API log.

By reading the log texts you are able to see specific details about the miner operation
and this kind of information is really helpful in case you need to do some troubleshooting.

These following screenshot images will demonstrate rest of the pages available in the miner web configuration
and this image set should provide you a good overview on the miner web configuration page.


System log and Cgminer API log. Click to show a high resolution image.


System information and System properties. Click to show a high resolution image.


Administration page and Interfaces page. Click to show a high resolution image.


Processes page and Reboot page. Click to show a high resolution image.

6) Performance test (top)
When all the settings were set properly, it was time to test the miner.
After the miner was ready with the startup process, the hash rate rose quickly to about 12.0 Th/s and stayed at that level.

Here is the miner status page view after 16 hours of mining.


Miner status page. Click to show a high resolution image.

As usual, the power measurement was done with Perel E305EM6-G energy meter.

Technical specs data sheet (.pdf document):
https://www.perel.eu/downloads/22/e305em6e305em6ggbnlfresdptpl.pdf


Perel E305EM6-G. Click to show a high resolution image. Picture taken by HagssFIN.


Power measurement. Click to show a high resolution image. Picture taken by HagssFIN.

A stable result for the power consumption at wall was 2323 W,
when the average hash rate after 16 hours of mining was 12.04 Th/s.

With these results we can calculate the power efficiency at wall.

2323 / 12040 = 0.1929 J  per  Gh/s.

7) Conclusion (top)
WhatsMiner M3X is a nice piece of gear in the currect Bitcoin ASIC miner hardware market
and their miner design ideas are very competetive with rest of the current generation competitor miners.

The power consumption is quite high and using the 28nm process node technology it is not able to achieve
as good power efficiency numbers as competitors.

I believe that this could be a different story, if they would had a 16nm or smaller process node tech available.

The miner price per hash rate is quite competitive at the moment when you compare it with the market prices.

This machine performed just as advertised, I got 12.04 Th/s hash rate and the nominal rate is between 12.0 and 13.0 Th/s.

Power consumption is high up in the 2kW area, but cooling design does it job properly.
There are big sized heat sinks with high rev cooling fans and the miner doesn't get too hot in normal operating conditions.
This is a very loud miner as most of the modern ASIC miners are, you don't want this in your bed room.

All in all I think that this miner is a nice small upgrade compared to the previous M3 model
and I'm looking forward to see what WhatsMiner has to offer in the future!

I would like to thank Team Pangolinminer and especially Laurent big time for giving this miner as a sample unit
and for the chance for me to give a review for it here at the forum.

If you got any questions you'd like to ask, feel free to drop them in this thread.
I will try to give my best answer.

8] How to order (top)
You can make an order simply by visiting the webshop.
See more details at the official overseas distribution arm Team Pangolinminer website.

Team Pangolinminer
www.pangolinminer.com
13  Economy / Computer hardware / [sold!] 4x GTX1080Ti GPU Rig installed in a Inter-Tech server computer case. on: April 06, 2018, 12:33:32 PM
EDIT2: This is now SOLD to a buyer here in Finland.
The sales thread is now closed and locked.

EDIT: This is now reserved to a potential buyer here in Finland.

Hello guys and gals,
I'm looking to sell this GPU rig, which consists of components listed below.

This is a low noise miner with two fans in front and with two fans in back.

Here are the technical specifications:
GPU: 4x Zotac Geforce GTX 1080 Ti Blower
Motherboard: ASRock H270 Pro 4, Socket 1151
CPU: Intel Pentium G4560 3,5Ghz Socket 1151
RAM: 4GB Crucial Ballistix Sport DDR4-2400 CL16
Hard drive: Kingston A400 120GB SSD drive
PCI-E risers: 4x ver006c Risers (6-pin PCI-E power connector)
Power supply: HP HSTNS-PL30 1200 Watt, 80PLUS Platinum power efficiency server power supply with accessories (PicoPSU, cables etc.)
Case: Inter-Tech IPC 4U-4129-N (modified for the GPU setup)

This rig has been assembled mostly with new components bought in January 2018,
so there is still plenty of warranty time left for the components.  Smiley

I can format the SSD hard drive and install a fresh new Ubuntu linux distro,
and also install drivers, programs needed to start mining if they buyer wants so.

Price: 0.50BTC (including the shipping)

Location: Finland (EU area)

Pictures: https://imgur.com/a/7XNcp

You can contact me by sending me a PM if you are interested.

Escrow service for the payment is more than welcome through OgNasty.
The escrow fee is at buyer's expense.

Please ask me any questions that may come to your mind.

14  Economy / Computer hardware / [sold!] [EU] 3x Innosilicon A4+ LTCMaster 620Mh/s on: April 01, 2018, 12:46:35 AM
EDIT:
And this is now sold to Zerinoff.  Smiley

Thread is now closed and locked.

Hello guys and gals,
I'm looking to sell three pieces Innosilicon A4+ LTCMaster 620Mh/s miners.

These are low noise level miners.
I have replaced the original cooling fans with Enermax D.F. Storm fans which are modified
to run at full speed 24/7 (3500 rpm).
This provides a great balance of low noise level and effective cooling for the miner.
I will of course also include the original Delta Electronics fans
and I can install those original fans prior to shipping if the buyer wants so.

Changing those fans did not damage any warranty seals.

The warranty for these machines is 180 days and it is valid until June 13, 2018.
 
Price for all three units: 0.6 BTC (including shipping)

Location: Finland (EU area)

No PSUs are included.

No cables are included.

Picture showing these three units: https://i.imgur.com/rx14tsg.jpg

Please hit me with a pm, if you are interested.

Escrow accepted,
the escrow fee is at buyer's expense.


Technical specifications from the official user guide:

https://i.imgur.com/gCZRDxU.png
15  Economy / Digital goods / [all gone and the thread is now closed..] 100USD Bitmain Coupons on: March 30, 2018, 11:25:04 PM
EDIT: I have closed and locked this thread in April 14.


My coupons are now all gone.

Happy easter and happy mining for everyone.

These gentlemen who have posted in this thread might still have some 100USD coupons left for give away:

  • philipma1957
  • generalt
  • BenRickert


EDIT:
Added BenRickert to the list, sorry that I forgot you..


Hello guys and gals,
I decided that I'm giving my -$100 USD Bitmain coupons away for free.

Max. five coupons for one person.


At the moment I have 17 coupons left.
I have 12 coupons left.
I have 7 coupons left.
I have 2 coupons left.

My coupons are now all gone.

The most ideal situation for me would be giving these coupons to guys who are new and starting their mining operation.

PM me if you need some.
Remember to mention how many you need and your Bitmain.com username.
16  Bitcoin / Mining support / Troubleshooting and repair guide for AvalonMiner models 721, 741, 761, 821 & 841 on: March 30, 2018, 04:53:15 PM
Troubleshooting and repair guide for AvalonMiner models 721, 741, 761, 821 & 841

Ongoing repair process for an AvalonMiner 821 unit. Click for a higher resolution image.

1) General information, most common tools needed
2) Troubleshooting
3) Tear down
4) Conclusion


Last updated in: May 14, 2018.

Nicely formatted version (May 14, 2018) is available for download here (Mega.nz cloud service):
https://mega.nz/#!o10yxaIC!yAODmwOLd8Fwqp3Wi-7fz54w05sdTzjOlPWtnubRIn8

1) General information, most common tools needed
(top)
This is an official troubleshooting and repair guide for AvalonMiner 7 and AvalonMiner 8 series.
All rights to fix or improve this document are reserved to Canaan Creative.

In this guide you will see how to disassemble and separate all miner components and it will help
you to understand how to replace a faulty miner component like for example a broken cooling fan or faulty PCB board.

You will also learn how to do the fault diagnosis to your miner in a case of
a miner malfunction and how to find out which miner component is most likely not working correctly.

This guide is made using an AvalonMiner 841 unit, but same principles apply
with other compatible models mentioned in this guide as well.

Most common tools needed:
  • Phillips headed screwdriver (it is good to have both PH1 and PH2 size screwdrivers / tips)
  • Digital multimeter
  • Static electricity protection (ESD mat or antistatic wrist strap for example)
  • If you don’t have anything for static electricity protection, please at least ground yourself by touching a grounded object to discharge the static electricity before touching a PCB board
  • Good quality thermal paste
  • Pure isopropyl alcohol for cleaning the old thermal paste
  • Soft cloth or soft paper for cleaning the old thermal paste


Phillips head screwdriver. Click for a higher resolution image.


Digital multimeter.


ESD mat and antistatic wrist strap.


Thermal paste.


Isopropyl alcohol.

These instructions apply for following AvalonMiner 7 and 8 series models:
  • AvalonMiner 721
  • AvalonMiner 741
  • AvalonMiner 761 (with a built-in power supply unit)
  • AvalonMiner 821
  • AvalonMiner 841


AvalonMiner 721 technical specifications.


AvalonMiner 741 technical specifications.


AvalonMiner 761 technical specifications.


AvalonMiner 821 technical specifications.


AvalonMiner 841 technical specifications.


2) Troubleshooting
(top)
In this chapter you will see the common methods for the troubleshooting process and you will also see example cases about the most common issues.

The goal is to help understand how to determine which miner component is causing the miner operation malfunction.

How to indicate your miner’s physical location
You can use the indicator LED to help you locate the miner.
Just simply press the indicator LED switch button to change the state from ’LED OFF’ to ’LED ON’.
You can find the indicator LED switch button location by following these steps:
  • 1. Go the controller web configuration page by using your web browser and login.
  • 2. Click ’Advanced Version’ to access the advanced user features in the OpenWrt firmware.
  • 3. Click ’CGMiner Status’ to see status for all the devices connected to the controller.
  • 4. Choose the AvalonMiner unit which you would like to locate and click ’LED OFF’ button located in the Indicator field.
    Now you should see that status change into ’LED ON’.
    Further observations about this situation are shown in two figures below.


Normal miner operation before pressing the indicator LED button - the indicator LED color is blue. Click for a higher resolution image.


After pressing the indicator LED button the miner in question changes the indicator LED color to white.

Video: How to Identify your Avalonminer for Troubleshooting
https://www.youtube.com/watch?v=vNMW0QtX5Bk



How to locate and open the CGMiner API Log
These following instructions will tell you how to locate and open the CGMiner API Log.

By reading the log text you are able to see lots of technical information related to the miner performance.

Step 1.
Use your web browser and access to the controller web configuration page.

Web configuration page, login screen.

Step 2.
Click ’Advanced Version’ to access all user features.

Dashboard view.

Step 3.
You are now able to see all the features available.
Now you need to click ’CGMiner API Log’ to access the log text.

System overview.

Step 4.
Click ’Debug Switch’ and after that you are ready to read and examine the CGMiner API Log.

CGMiner API Log.


Information about indicator LED colors and CGMiner API Log error codes
During the troubleshooting it is best to find and use all the information available, so that the repair is a quick and straight forward process.

The miner is able to report about specific issue with different LED colors and error codes.
In these following tables you can see a description for each LED color and error code.

Please remember to click 'Debug Switch' button before reading and examining the CGMiner API Log.

Video: Avalonminer 741 and 841 - LED Color Guide

https://www.youtube.com/watch?v=P59HPZnIk7s

Table 1. AvalonMiner LED colors.


Table 2. PMU board LED colors.


Table 3. AUC3 Converter LED colors.



One of the most frequent errors is the socket connect error.
Socket connect failed => Connection refused

This error can happen because of numerous different things, but here is a list showing few of them.
•  Miner is still in the startup process
•  Incorrect pool settings
•  Wrong OpenWrt firmware version
•  Communication error.

Table 4. CGMiner API Log error codes.



How to read the abbreviations and values found in the CGMiner API Log

In this following table you can see the CGMiner API Log thoroughly explained, row by row.
This provides you a lot of help in the troubleshooting process, as you are able to determine possible issues based on the values seen in the CGMiner API Log. The information is divided into three parts, part 1-3.

Table 5. List of codes found in the CGMiner API Log. Part 1.


Table 6. List of codes found in the CGMiner API Log. Part 2.


Table 7. List of codes found in the CGMiner API Log. Part 3.


How to check the power supply unit health
If you want to know if the power supply is passing any voltage to the PMU board,
you can measure the +12V rail output voltage to find out.

According to the ATX specification, the measured voltage should be from 11.4 to 12.6 VDC.
Please also take into account the rated input voltage for your AvalonMiner.

The most safe area for the input voltage is 12.0 to 12.5 VDC.

Video: How to check your AvalonMiner power supply
https://www.youtube.com/watch?v=1Ty3D5vuj_I

For measuring the voltage you need a multimeter.
You can easily measure the voltage by applying one multimeter test lead to the +12V (yellow) and one multimeter test lead to the COM (black).


6-pin PCI-E power connector pinout. Click for a higher resolution image.

First you need to select the right measuring mode by using the selection knob in the middle of the multimeter.
Make sure that your test leads are connected correctly to the multimeter for voltage measurement setup.


Selecting the right measuring mode for the 12 VDC voltage measurement. Click for a higher resolution image.

You can use any safe methods, tools or tape you need to hold the power connector still
so that it is easy for you to hold the test leads in position.


Measuring the voltage. Click for a higher resolution image.


Cooling fan
If your miner won’t start operating, one of the first things to check if the cooling fan is working.
You can check it by doing both visual inspection and looking at the miner status page.

If you find a miner with fan reading at 0 rpm or close to it, then it is quite clear that you need to replace that miner’s cooling fan.

Please also see if there are any indicator LED colors or log error codes related to a cooling fan issue.


Fan speed 0 rpm at the miner status page.


Fan speed 0 rpm at the CGMiner API Log page.

If the cooling fan failure occurs during the warranty period, you can request a replacement cooling fan from Canaan Creative.

If your miner is out of warranty, here is a list of few compatible replacement cooling fan models:
  • Cooler Master A12038-60BB-4RP-F1
  • Delta Electronics QFR1212GHE
  • Delta Electronics QFR1212GHEXUM
  • Nidec V12E12BS1B5-07
  • Sanyo Denki 9GV1212P1J01
  • Shengjiu SG121238BS
  • Sunon PSD1212PMBXA-F-PWM

AvalonMiner Controller / Raspberry Pi
If you are not able to access the controller unit at all and you have double-checked that your setup is ok,
then it is possible that your controller unit is faulty and needs to be replaced with a new one.

Please also make sure that the 5 VDC wall wart is in ok condition and that
it is able to provide at least 5 VDC 2.5 A power for the controller unit.

Here is the list of compatible controller units:
  • AvalonMiner Controller (RPi 3 based device)
  • Raspberry Pi 1 Model B
  • Raspberry Pi 2 Model B
  • Raspberry Pi 3 Model B



AUC3 Converter

If you are able to access the controller unit successfully, but you don’t see any miner devices connected, it is possible that there is a faulty AUC3 converter or a faulty control board (MM board).

You can look at the LED colors and log error codes and try to figure out the issue that way.

You can try a spare AUC3 converter if you have another one.

You can easily troubleshoot if it is the AUC3 which is faulty, if you have a ten miners or more in your setup.

This means that you have at least two AUC3 converters in your setup. You can swap those two AUC3 converters and try to see if the issue moves to the another group of miners. If it does, you should be able to know which one is the faulty AUC3 converter.

Control board (MM board)
If you are able to access the controller unit successfully, but you don’t see a miner device connected, it is possible that there is a faulty AUC3 converter or a faulty control board (MM board).

Another example of possible control board malfunction is that if there is a huge number hash boards down suddenly.

One good hint is that you have for example five miners connected to one AUC3 converter, and you are only able to connect four of them, it indicates that there might be issues with one miner control board.

You can look at the LED colors and log error codes and try to figure out the issue that way.

You can try using a spare control board (MM board) for the miner in question if you have another one.

PMU board
PMU board stands for Power Management Unit board.

If you have one or more hash boards down and without power, it is a good idea to figure out how is the PMU board condition.
You can do this by looking at the CGMiner API Log.

If you any values zero or values having an odd number, it is possible that you have a faulty PMU board.
When you look at the log, please pay attention to Vi and Vo values (voltage in and voltage out).

One PMU board has two power terminals, so there is a total number of four values visible in the log.
There are four digits presenting the measured input voltage and output voltage. For example value 1199 means 11.99 VDC.


Both PMU boards are working normally.


The second PMU board is not working at all.

In this next image you can see how to identify which PMU board is the first one and which is the second.


PMU board identification.

Hash board
To find out if you have a hash board issue, you can look at two things in the CGMiner API log.
  • Works (MW0 – MW3)
  • Chip temperatures (PVT_T0 – PVT_T3).

If there is one board with no works, then it is clearly a faulty one.
Your miner might also have issues with constant rebooting because one of the ASIC chips overheats.

In this case you can first try to clean the old thermal paste and then apply new thermal paste.
If new thermal paste does no good, you need a new hash board.


Number of works shown in the log. This miner is working normally.


Every single ASIC chip temperature shown in the log.

In this next image you can see how to identify which ID number is for which hash board.


Hash board identification.


3) Tear down
(top)
You only need one tool for the tear down process and it is a screwdriver.
Make sure you have a good quality Phillips head screwdriver and right sized,
to avoid damaging the small bolts.

Please also be careful not to use too much force which can potentially damage your
screwdriver, bolt or the thread.

Please pay attention using the right type of a bolt when assembling it all back together.

These instructions show you how to separate each miner component,
so that you are able to replace a faulty part in question with a new spare part.

Video: Avalonminer 741 Disassembly Guide
https://www.youtube.com/watch?v=1W_BO1PimlA

Step 1.
Remove the steel tube case.
There are four small bolts in both sides of the miner, so a total number of eight bolts.

Removing the steel tube case. Click for a higher resolution image.


Steel tube case removal completed.

Step 2.
Remove the cooling fan. There are four screws holding the cooling fan shroud against the frame.

Removing the cooling fan shroud.


Unplug the 4-pin fan cable connector and remove the cooling fan.

Unplugging the 4-pin fan cable connector.


Removing the cooling fan.

Video: Avalonminer 741 and 841 Fan Replacement Tutorial
https://www.youtube.com/watch?v=-ltqGavbzd0


Step 3.
Unplug the 4-pin fan extension cable from the control board.

Unplugging the 4-pin fan extension cable from the control board.

Step 4.
Remove the control board (MM board).
There are two small bolts to be removed, after which you can gently detach the control board which is connected to both two PMU boards (Power Management Unit).

Removing the control board.


Removing the control board.

Step 5.
Remove the hexagon pattern steel grill.
There are four small bolts holding it against the frame.

Removing the hexagon pattern steel grill.

Step 6.
Remove both two frame parts.
There are six small bolts holding one frame parts against the heat sinks, so a total number of twelve bolts.

Removing the frame parts.

Step 7.
Remove both two power management unit boards (PMU board).
There are six bolts per PMU board and four of them

Removing the PMU board.

Step 8.
Remove the hash board.
There are three small bolts and six big bolts holding one hash board against the heat sinks.

Two hash boards with one shared large heat sink and two invidual heat sinks.

Remove the old thermal paste if needed, if it is hardened or damaged in any different way. You should do this by using pure isopropyl alcohol and a soft cloth or paper. You can also use a cotton swab if needed.

Removing the old thermal paste.

After the surfaces are cleaned, you can apply new thermal paste. Do not use your finger or anything else that causes impurities to mix with the thermal paste when applying the new thermal paste.

Applying new thermal paste.

Now we have gone through how to tear down the miner,
how to separate all the miner components
and how to replace each invidual miner component.

Assembling it all back together is essentially doing this same process backwards.



4) Conclusion
(top)
These instructions should be able to help you with most of the issues that might occur,
even though AvalonMiner failure rate in field is close to 1%, which is a low number compared to the competitors.

But please remember that if you need help with an miner issue, you can always also do these two things:
  • Submit a support ticket at Canaan Creative website
  • Join the discussion thread at Bitcointalk.org forum to get comments and instructions on your issue.

Any questions, suggestions or comments are welcome to be posted in this Bitcointalk.org forum thread.

Canaan Creative: http://www.canaan.io


Canaan Creative support ticket form at www.canaan.io . Click to show a higher resolution image.
17  Bitcoin / Hardware / (Review/Guide) AvalonMiner 841 13.0 Th/s, 1290W Bitcoin (SHA-256) ASIC miner on: March 24, 2018, 07:11:58 PM
(Review/Guide) AvalonMiner 841 13.0 Th/s, 1290W Bitcoin (SHA-256) ASIC miner

Click for a higher resolution image. Picture copyright (c) Canaan Creative.

1) General information, other items needed
2) Unpacking
3) Overview and tear down
4) Controller unit setup
5) Physical setup for the miner and controller
6) Miner settings configuration
7) Performance test
8] Tuning
9) Conclusion
10) How to order


Last updated in: March 24, 2018.

Steemit blogging website:
https://steemit.com/review/@hagssfin/review-guide-avalonminer-841-13-0-th-s-1290w-bitcoin-sha-256-asic-miner

Nicely formatted version (March 24, 2018) is available for download here (Mega.nz cloud service):
https://mega.nz/#!pgFTGJhB!ZvhhzJ1BEJEpC_FBJzJLA4WQG_af9jLfyO0whOCocdY

1) General information, other items needed
(top)
AvalonMiner 841 is a Bitcoin (SHA-256) ASIC miner using 16nm ASIC chip technology.
It is manufactured by Canaan Creative (headquarters in Beijing, China).
This miner is the second 8th generation AvalonMiner model,
and it uses 16nm Bitcoin ASIC chip called A3210HP.

A3210HP is a slightly improved version of the A3210 chip used in AvalonMiner 821 model.
The miner design is further improved and this results in even better power efficiency than with the A821.

AvalonMiner 841 does not have a built-in controller included and you need a separate controller unit,
like AvalonMiner Controller or any of the Raspberry Pi single-board computer models to run it.
This feature makes it possible to connect up to max. 20 AvalonMiners to be controlled by the controller unit.
Five miners per one AUC3 converter and four AUC3 converters per one controller unit.
This saves some money in network infrastructure cost especially if you have a large mining operation.

AvalonMiner 841 weights 4.7 kg and outer dimensions are 370mm x 150mm x 136mm.
The nominal hashrate is 13.0 Th/s (-5% – +10%) with a nominal power consumption of 1290 W (+0% – +20%).

This is a review and also an official setup instructions guide for the AvalonMiner 841.
All rights to fix/improve this document are reserved to Canaan Creative.

To find out the story how this all came together in co-operation with Canaan Creative,
you can have a look at the write-up about my visit in Beijing, China.

There will also be a separate guide for how to troubleshoot and repair a faulty AvalonMiner,
and the guide has been published now in March 30, 2018: https://bitcointalk.org/index.php?topic=3224256

Technical specifications:


Other items needed:
  • One server grade 12 VDC power supply with at least 8x PCI-E 6-pin connectors,
    every connector with a dedicated cable and at least 18AWG wire gauge. The power capacity is recommended to be at least 1400 W.
    Sorcerer Power Supply Unit is the official 1600 W custom power supply unit for AvalonMiners.
  • C13 power cord suitable to your country's electrical socket. Use only good quality, large wire gauge power cords.
  • AvalonMiner Controller or Raspberry Pi single-board computer.
  • 5 VDC 2.4 A USB wall wart for the controller unit.
  • USB Type-A -> Micro USB cable between the controller unit and the 5 VDC 2.4 A USB wall wart.
  • Ethernet cable to go from the controller unit to your router/switch device.
  • Computer to set initial pool and configuration settings.

2) Unpacking
(top)
This AvalonMiner 841 unit was received as a sample unit for this review.
After opening the cardboard box you can see this simple and sturdy solution for the packing.
There are two large pieces of foam in both ends of the miner supporting and protecting it,
and also one piece of foam in the middle section.
The cardboard box is just the right size for this packing setup and there is no extra space.
This is important as it is optimal that the miner doesn't move inside the cardboard box during the shipping.
If the miner would have space to move inside the cardboard box during the shipping,
this could result in physical damages.

The large courier companies like DHL, Fedex, UPS, TNT, EMS International and Aramex are able to
do the delivery pretty fast internationally even with the standard service.
For example it usually takes DHL and Fedex only 4-5 working days to deliver shipment from China to Finland,
even though the straight line distance between these countries is roughly 6000 kilometers.


Cardboard box and protecting foam material. Click for a higher resolution image. Pictures taken by HagssFIN.

After unpacking and unwrapping the miner was ready to be setup and tested.


Unpacking and unwrapping the miner. Click for a higher resolution image. Pictures taken by HagssFIN.

Canaan has made few changes to the product list principles.
When you buy a A841 unit, you get the miner and one AUC3 cable.


AvalonMiner 841 product list.

It is important to notice that you also need the AUC3 converter, a controller unit and of course a power supply unit.
With previous AvalonMiner models there used to be one AUC3 and AUC3 converter in the same cardboard box with the miner,
but now you need to buy AUC3 converters separately or buy the AvalonMiner Controller kit.

With AvalonMiner Controller kit you get this following list of items:

AvalonMiner Controller product list.

As mentioned earlier, if you want to use your own Raspberry Pi single-board computer as the controller unit,
it is also possible to buy AUC3 Converter dongles separately from both Canaan and their official distributors.

3) Overview and tear down (top)
This chapter focuses on having a close visual look at the miner and other related devices.
In these following images you can see items used in a typical setup:
  • AvalonMiner 841
  • AUC3 Converter (I2C-USB converter dongle)
  • AUC3 Cable (5-pin data cable)
  • USB Type-A -> Micro USB cable
  • 5 VDC 3.0 A USB wall wart.
  • AvalonMiner Controller
  • Lite-On PS-2142-2L 1400W server power supply, which represents a general brand option for the PSU.
  • Sorcerer Power Supply Unit, which represents the official custom PSU option.

Click the image to show a higher resolution image. Pictures taken by HagssFIN.










As you can see in these images a custom power supply unit comes with built-in 6-pin PCI-E power cables,
where as using a regular brand server grade power supply requires buying a breakout board
and eight pieces 6-pin PCI-E power cables.

This next step is a thorough tear down for the miner.
Only one tool is needed for this and it is a Phillips headed screwdriver.
This is a neat detail in the design and makes it really easy and straight forward to disassemble the unit.

Click the image to show a higher resolution image. Pictures taken by HagssFIN.










4) Controller unit setup (top)
When it comes to the controller unit, you have two options:

1. You can use the AvalonMiner Controller.
Using it is very straight forward, because it is ready assembled
and the OpenWrt based firmware is already installed on the Micro SD card.


AvalonMiner Controller. Click for a higher resolution image.. Pictures taken by HagssFIN.

2. You can build one yourself by using a Raspberry Pi single-board computer and other supplies.
So in this next part you can see how to build a controller by yourself,
using a Raspberry Pi 3 single-board computer and some other supplies needed.

It is fairly easy to source these parts needed and you can use a local electronics store to find these supplies.

Here is an example for the shopping list:
  • Raspberry Pi 3 single-board computer
  • Case for the Raspberry Pi 3
  • 8GB Micro SD card
  • 5 VDC 2.4 A USB wall wart
  • USB Type-A -> Micro USB cable


Supplies. Click for a higher resolution image. Pictures taken by HagssFIN.

List of supported controller devices:
  • AvalonMiner Controller (RPi 3 based device)
  • Raspberry Pi 1 Model B
  • Raspberry Pi 2 Model B
  • Raspberry Pi 3 Model B


Supported controller devices. Click for a higher resolution image.

Controller setup instructions:

1.
AvalonMiner Controller’s OpenWrt based firmware supports the following types of Raspberry Pi single-board computer:
  • AvalonMiner Controller
  • Raspberry Pi 1 Model B
  • Raspberry Pi 2 Model B
  • Raspberry Pi 3 Model B

2.
A minimum capacity of 4GB memory card is required.
There is no requirement for brands, speed rating is recommended for Class 10.
(Please be select type of memory card based upon your selected Raspberry Pi model)
  • Raspberry Pi 1 Model B using a SD card
  • Raspberry Pi 2 Model B using a Micro SD card
  • Raspberry Pi 3 Model B using a Micro SD card
  • AvalonMiner Controller using a Micro SD card

3.
You need to have a SD card reader.
When you buy the Micro SD card, you want to make sure it comes with a SD card adapter.


Micro SD card with a SD card adapter. Click for a bigger version. Picture taken by HagssFIN.

Put your memory card to the SD card reader.


Integrated SD card reader. Click for a higher resolution image. Picture taken by HagssFIN.

4.
Depending on your Raspberry Pi model, select and download the firmware version.
Raspberry Pi 1 Model B Firmware:
https://canaan.io/downloads/software/avalon841/openwrt/latest/rpi1-modelb/openwrt-brcm2708-bcm2708-rpi-ext4-sdcard.img
Raspberry Pi 2 Model B Firmware:
https://canaan.io/downloads/software/avalon841/openwrt/latest/rpi2-modelb/openwrt-brcm2708-bcm2709-rpi-2-ext4-sdcard.img
Raspberry Pi 3 Model B Firmware:
https://canaan.io/downloads/software/avalon841/openwrt/latest/rpi3-modelb/openwrt-brcm2708-bcm2710-rpi-3-ext4-sdcard.img

5.
Install a tool for writing a image to SD card, if you don't have one installed already.
Win32 Disk Imager: https://sourceforge.net/projects/win32diskimager/

6.
Open the tool software and select your SD card reader device letter.

Click for a higher resolution image.

7.
First click the folder icon.
Then locate and select the OpenWrt firmware you downloaded earlier.

Click for a higher resolution image.

8.
Click Write, and then click Yes, to start writing your image.

Click for a higher resolution image.

9.
Wait for the process to complete.

Click for a higher resolution image.

10.
When the following message is displayed, it means that you managed to write the OpenWrt firmware successfully.

Click for a higher resolution image.

Click ok and exit.

If you followed these steps successfully, you now have a working controller unit.

5) Physical setup for the miner and controller (top)
Connecting everything together is quite simple, if you are familiar with ASIC miner hardware.
These instructions have a picture for each to make each step simple and straight forward as possible.

Single miner setup instructions:
1.
Connect the 5VDC wall wart to the controller unit.

Click for a higher resolution image.

2.
Connect a Ethernet cable to the controller unit.

Click for a higher resolution image.

3.
Connect the USB Type-A -> Micro USB cable and 5-pin AUC3 cable to the AUC3 I2C-USB communication converter unit.

Click for a higher resolution image.

4.
Connect that USB Type-A -> Micro USB cable other end to the controller unit. You can use any of the four USB ports available.

Click for a higher resolution image.

5.
Connect the other end of the 5-pin AUC3 cable to the miner unit.

Click for a higher resolution image.

6.
Connect eight pieces 6-pin PCI-E power cables with invidual cables to the miner.
It is strongly adviced to use a server grade power supply with at least 1400W power capacity.

Click for a higher resolution image.

7.
Plug in the 5 VDC wall wart to power on the controller unit.

8.
Connect a C13 power cord first to the power supply unit and then to the wall socket.
Make sure that the power switch in the power supply unit is turned on.

How to do a setup for twenty miners and one controller unit:
If your setup is going to have more than one miner, you can daisy chain max. five miners per one AUC3 converter
and you can connect max. four AUC3 converters to one controller unit.

The setup principles are pretty easy to understand by looking at these following two diagrams:

Click for a higher resolution image.

If you like a video tutorial better, there are two good setup tutorial videos made official Canaan distributors Blokforge (Blokforge official channel)
and Cryptouniverse (video released in TechMagnet channel, presenter Stefan is the CTO of Cryptouniverse).

Blokforge tutorial video link: https://www.youtube.com/watch?v=z8r0tbUmgCU
Cryptouniverse tutorial video link: https://www.youtube.com/watch?v=-wa2L97ReOw

6) Configuration (top)
Controller configuration instructions:
1.
Connect the power to the controller, and make sure that the controller and computer are connected to the same local area network.
The other option is that you can also connect the controller directly to the computer with a network cable.

Click for a higher resolution image.

2.
The default IP for the controller is 192.168.0.100. The IP address of the computer needs to be adjusted to access the controller.

Click for a higher resolution image.

3.
Use your web browser to access “192.168.0.100”, and you will see the following login screen.

Click for a higher resolution image.

4.
There is initially no password, so you can enter to the Dashboard after you click Login.


5.
You can click Configuration to configure your miners and see your pool information.
For example, you can set up three pools and corresponding miners with the default execution priority pool1> pool2> pool3.


6.
If you need to change the network settings for the controller, click on Network to configure,
click Save & Apply, and then power down your unit, and manually restart the controller.


7.
After the configuration you can change your computer back to the automatic IP address acquisition.

8.
If the controller is properly connected to the Internet, you can access different sections
in the miner web configuration page, for example the Cgminer configuration page and the miner status page.
As long as a miner is correctly connected via AvalonMiner USB Converter to this controller unit,
you will see them on the overview page and see relevant information on these devices.


7) Performance test (top)
After all the setup and configuration is ready, it is time to test the miner.
Mining was started using the default settings.

The average hash rate after twenty-six hours of running time was about 13.6 Th/s.

The advertised hash rate for the AvalonMiner 841 is 13.0 Th/s,
which is the minimum hash rate for every sold unit.
Usually the actual hash rate is well above this value,
and the unit tested here was able to perform 0.6 Th/s better than the advertised value.

Status page, first test run. Click for a higher resolution image.

Power supply unit used in these tests is Lite-On PS-2142-2L 1400W server power supply.
Two separate test runs were made for the power consumption measurement.

The power measurements were done with Perel E305EM6-G energy meter.
Click here for Perel E305EM6-G technical specs data sheet.

The miner was set with default settings.
Hash board frequency is controlled automatically to make each hash board perform best as possible.
The default value for Voltage Offset setting is 0.


Perel E305EM6-G. Click for a higher resolution image. Picture taken by HagssFIN.


Power measurement, first test run. Click for a higher resolution image. Picture taken by HagssFIN.

The result for the power consumption (at wall) was 1350 W,
when the average hash rate was 13.575 Th/s.

With these results the power effiency at wall can be calculated.

1350 / 13575 = 0.0994 J  per  Gh/s.

Another test run was made in which the results were little different.

Status page, second test run. Click for a higher resolution image.


Power measurement, second test run. Click for a higher resolution image. Picture taken by HagssFIN.

The result for the power consumption (at wall) was 1400 W,
when the average hash rate was  13.515 Th/s.

With these results the power effiency at wall can be calculated once again.

1400 / 13515 = 0.1036 J  per  Gh/s.

A good estimate is that these performance results can vary
in about 13.0 - 13.7 Th/s area with 1300 - 1400W area power consumption (at wall).

There is also a possibility for the meter have a small measurement error,
which must also be taken into account when looking at these results.

It would be possible to have even more accurate results
using a power analyzer for measuring the power, but such device was not available for this testing.

8] Tuning (top)
This tuning chapter was done in much same fashion as in the A821 review.
To get the voltage offset value working, we need to put it as a Cgminer command
in the 'More Options' field found in the Cgminer configuration page.
Here is an example: "--avalon8-voltage-level-offset -2".
See more details in screenshot images below.

Testing made earlier in this review was done with the default setting for the voltage offset, which is 0.
Now the miner will be tested with every available voltage offset value.

The miner will be run for at least one hour before looking at the results.

Just like with the previous AvalonMiner generation, it is possible to choose a value from -2 to +1 for the voltage offset.
Instead of changing the hash board frequency setting, AvalonMiner performance can only be controlled by changing the voltage offset value.

Quote from: Canaan Creative
In the Controller Dashboard, what does the Voltage Offset option do?

We added a Voltage Offset option for users because each AvalonMiner is different with each other because of the inclusion of so many high performance chips. The AvalonMiners are very sensitive with voltage, so the “Voltage Offset” option is used for tweaking the AvalonMiner’s voltage. If the miner works well, we suggest to not change the voltage.
And, the lower voltage offset, the lower power. So if the miner works well with -2, it just means the miner has better health.
Source: https://canaan.io/question/in-the-controller-dashboard-what-does-the-voltage-offset-option-do/

This time I was able to see difference in performance and power consumption value, when testing each different voltage offset value.
Power consumption was moving in 1330 - 1400W area, and the hash rate was in 13.3 - 13.7Th/s area.

Please notice that these power consumption results are measured power at wall,
so the power supply power efficiency also has an effect in the result.

Voltage offset value    Hash rate (Th/s)    Power consumption (W)    Power efficiency (J per Gh/s)    
-2  13.3513320.0998
-1  13.5413650.1008
0  13.5214000.1036
+1  13.6513950.1022


Cgminer status page view and Cgminer configuration page view, when the voltage offset value is -2. Click for a bigger version.

Cgminer status page view and Cgminer configuration page view, when the voltage offset value is -1. Click for a bigger version.


Cgminer status page view and Cgminer configuration page view, when the voltage offset value is 0. Click for a bigger version.


Cgminer status page view and Cgminer configuration page view, when the voltage offset value is +1. Click for a bigger version.


Power consumption measurement, when the voltage offset value is -2. Click for a bigger version.


Power consumption measurement, when the voltage offset value is -1. Click for a bigger version.


Power consumption measurement, when the voltage offset value is 0. Click for a bigger version.


Power consumption measurement, when the voltage offset value is +1. Click for a bigger version.

9) Conclusion (top)
Canaan keeps developing new AvalonMiner models, and while the power efficiency is time after
time improved, the miner design still remains also solid and stable.
According to Steven Mosher, the expected failure rate in the field for AvalonMiners is close 1%.

Looking at this unit closely and disassembling once again convinced me
about the robustness in the miner design.

While the price tag is little higher than competition,
the reduced need for repair, reduced repair costs and reduced down time
most likely result in lower total costs during the miner lifetime.

I would like to thank Canaan Creative for sending this nice piece of gear.
Special thanks to Steven and Lily for inviting me to Beijing
and once again for all the efforts to make this A841 review possible!

If you got any questions or comments about this review/guide,
feel free to drop them here in this thread.  Smiley


10) How to order
(top)
60 units or more:
If you want to buy 60 units or more, you can buy them directly from the manufacturer Canaan Creative.
https://canaan.io/shop/

Less than 60 (1 - 59) units:
If you want to buy less than 60 units, you will need to order from your local official Canaan hardware distributor.


List of Official Canaan Distributors in March 24, 2018.

Click here to find out the up-to-date official distributor list.

Canaan Creative
:
www.canaan.io
18  Economy / Computer hardware / [sold!] [EU] Bitmain Antminer A3 Siacoin (Blake 2b algo) ASIC miner on: March 22, 2018, 05:25:51 PM
Hi,

I'm selling one Antminer A3 without psu and cables (power, ethernet, ..).

Machine is in good condition and about five months of Bitmain warranty time still left.

Price: 0.15BTC incl. shipping

Location: Finland (EU area)

No need to pay VAT taxes in EU area, I've already paid it.

I accept btc payment or an equivalent amount with other cryptos.
You can pay me directly or use an escrow service like OgNasty for example.



Edit (March 23, 2018):
This is now sold to username Tupsu.

The thread is now locked.
19  Economy / Computer hardware / [sold!] Hotmine X5 3.4 Th/s Bitcoin ASIC miner, low noise unit, including PSU on: March 21, 2018, 11:36:25 PM
EDIT:
This is now sold to Zerinoff. The thread is locked.


Hello ladies and gents, I'm selling following hardware..

Hotmine X5 3.4 Th/s Bitcoin ASIC miner, low noise unit, including PSU
This includes one unit Hotmine X5 miner with a 1000 W (80 Plus Gold efficiency level) ATX power supply unit.

No cables (power, ethernet..) are included.

This unit hashing stable at about 3.4 Th/s hash rate.
Power consumption is roughly 450 W.
Power efficiency is 0.13 J / Ghs.

Noise level is pretty low, I would compare this to the Antminer S1 or S3 when it comes to the noise level.

Available now.

Price (incl. shipping): 0.07 BTC


Location: Finland (EU area)

No need to pay taxes in the EU area, VAT is already paid.

You can pay me directly with BTC or we can use a escrow service (philipma1957 or OgNasty for example).
Escrow fee is at buyer's expense.

See my review for more technical info about the Hotmine X5:
https://bitcointalk.org/index.php?topic=1857129


Check out this Imgur.com photo album for photos:
https://imgur.com/a/TROL8

If you are interested, you can contact me by sending me a PM here at the forum.  
Smiley
20  Bitcoin / Mining / Notes from my journey to Beijing & visiting Canaan Creative in March 10-15, 2018 on: March 20, 2018, 08:52:07 PM
Notes from my journey to Beijing & visiting Canaan Creative in March 10-15, 2018

Me posing at the SMT factory visit.   (c) Lily Han

1) Chapter One – The Beginning
2) Chapter Two – Thoughts about miner troubleshooting and repair
3) Chapter Three – Some quick planning
4) Chapter Four – Visiting the SMT factory
5) Chapter Five – The assembly line and training
6) Chapter Six – Time to say farewell

Date published: March 20, 2018.

Steemit blogging website:
https://steemit.com/avalonminer/@hagssfin/notes-from-my-journey-to-beijing-and-visiting-canaan-creative-in-march-10-15-2018

Nicely formatted PDF document version is available for download here (Mega.nz cloud service):
https://mega.nz/#!hpMS2TaA!uo5AvO4oQ7bqLVo85r6BvLsyEJWXnxWaJwqvanq8CEw

1) Chapter One – The Beginning

So, this all started after I did the review for the AvalonMiner 821.

Steven Mosher, the Head of Sales & Marketing at Canaan Creative,
said that he was really impressed with the A841 review and user guide.

He asked if I have ever been in China. I said 'no I have not', and
he then responded by inviting me to visit Canaan Creative in Beijing, China
with my expenses covered by them.
This was an very exciting offer and I was really happy to accept his invitation
as I had space in my calendar during my fourth and last year studying in the university of applied sciences.

I travelled to Beijing in March 10 and travelled back home in March 15.

The main goals during this visit was to improve the documentation and for me to learn thoroughly how to troubleshoot and repair AvalonMiners.

The documentation would include unpacking, setting up, running the miner, tear down, troubleshooting and repair guide.


Finnair Airbus A350-900 jet airliner.

2) Chapter Two – Thoughts about miner troubleshooting and repair

Most of the miner issues are easy to fix yourself, if you have good instructions.

Canaan would prefer sending a spare part in case of a hardware issue,
instead of customer sending the faulty miner back for repair service.

Sending spare parts and replacing the faulty part by yourself also saves the
customer's money since there will be a shorter down time.

The training for me to learn repair methods and troubleshooting
had a goal for me becoming the first certified Avalon technician outside
the Canaan Creative company. The basic idea is to train technicians,
who will then pass on the knowledge by teaching other people interested and
this way share the knowledge forward. So after I know how to do it,
I could teach other people how to do it and also offer consultation services for those who need it.

I think growing a network of people with knowledge how to repair the miner
is actually quite refreshing idea, instead of sending the machine to a repair location and having a long down time.

In my opinion owning a miner means that you should get some knowledge on how to use it and also how to maintain it.


Ongoing disassembly for an AvalonMiner 821 unit.

3) Chapter Three – Some quick planning

We started by meeting with Steven in the hotel lobby and planning out the schedule for the visit.

In the next day it was time to go and visit the Canaan office,
where we went through the details with Steven Mosher and Lily Han,
who both work in the global sales team.

The idea was to create same kind of documentation as I did with the A821 review,
but improve it and also add chapters for troubleshooting and repair.

The troubleshooting guide was planned to do with first presenting the problem
and after that presenting the possible solution for this problem.

Repair guide was planned to begin with a thorough tear down,
which shows the user how to do a full disassemble for the miner.

This helps the user on how to change a faulty part to fix the miner.

So in case the user needs to change a cooling fan or a hash board,
he knows how to go through the disassembling and assembling the miner.

With AvalonMiner all this can be done by using one Phillips head screwdriver.


AvalonMiner 841 engineering sample unit.

4) Chapter Four – Visiting the SMT factory

We also discussed about the idea to train certified technicians to share the knowledge forward.

I was invited as a test subject so to speak, and based on the experience
the training would be improved and extended to involve more people.

I was free to document my visit and also write a report card to critizize my visit pros and cons to improve next sessions.

We talked about localizing the knowledge by inviting people from different areas, say like the US, Europe, Russia and so on.

Steven was thinking out loud about inviting Philipma1957 as the US representative if he is interested
and also few other guys from different regions for the next training session which was also planned to be held in Beijing.

The idea was also in this way to gather feedback from customer representatives
directly to the engineering team in case they have some ideas to further improve
both hardware and/or software based on their AvalonMiner usage experiences.

After these discussions, Steven needed to go for a meeting and we continued the visit with Lily.
It was planned that I do two factory visits with him to look how the AvalonMiners
are manufactured and tested from the very beginning to the finished product.

First we went to see the SMT (Surface mount technology) factory, where the AvalonMiner PCB boards were made.

Both A821 and A841 boards were made at the facility, but the main focus in the production was the A841 boards.
The A841 uses the same ASIC chip as the A821 did (A3210 chip), but the design is improved
and for example the power efficiency is better than with the A821.

I was really impressed to see these manufacturing methods as this was my first time visiting a SMT factory.


Panasonic SMT machine working.   (c) Lily Han



Ongoing PMU board testing.


Lots of AvalonMiner 8 series PMU boards.


AvalonMiner 821 hash boards.


AvalonMiner 841 hash boards.


Inside a machine.

5) Chapter Five – The assembly line and training

The day after that we did a second visit to another factory, where the assembly was done.

There we could see how the PCB boards, heatsinks, steel tube casing,
fan etc. comes together resulting in a finished product.

This was also the same location where we started our training to learn thoroughly
how to troubleshoot miner issues and how to fix those issues.


AvalonMiner assembly line.


AvalonMiner assembly line.


Fresh batch of AvalonMiner 841 units going to the burn-in test room.


AvalonMiner 841 technical specs label.


Finished and tested pallets of AvalonMiner units ready to be labeled, packed and then shipped.

We started the training by having a look at a fully working A821 unit.

The second miner was a faulty A821 unit.
This one had one faulty PMU board (the left one).
We noticed quite easily by looking at the Cgminer API log.

To see if a PMU board if faulty, you want to look at the Vi (voltage in) and Vo (voltage out) values.
If you see an odd value, like zero for the Vi or Vo, you have a faulty PMU board.
We disassembled the control board (MM board) and then the PMU board.
Then we had a new PMU board and we assembled it all back together.

The third A821 unit we tested had one hash board damaged.
This hash board had one ASIC chip overheating at around 114 Celsius temperature.
We recognized which hash board it was by looking at the Cgminer API log.
In the log we can see chip temperatures for each hash board.
After we knew which hash board it was, we disassembled and removed the bad hash board.
And then we had a new hash board, silicon grease and assembled it all back together.

We stayed at a hotel nearby, and continued this training in the following day.
In the second day at the assembly factory we went to the burn-in test room,
where the finished miners are tested thoroughly before they are packed and sold forward.

Lily had set us a good practice setup.
There was a setup of twenty AvalonMiner 821 miners, and five of them had somekind of an issue.
There was me and four Korean gentlemen, and we each had one miner to fix.

My unit kept overheating and restarting over and over again.
I looked at the Cgminer API log and noticed that temperature values didn't make any sense
with three hash board, as the log said that some of the chip temperatures were in the -40 Celsius area.


PMU board replacement.

So that got me thinking, that most likely there aren't three faulty hash boards,
but instead the control board (MM board) might be faulty.
And that is why I first replaced the control board.
After the control board was replaced, I tested the miner.
Now the control board issue was fixed, but there was one hash board with one ASIC chip overheating.
Each hash board has own number and it makes it easy to recognize which of the four hash boards is the faulty one.
So it was time to change a new hash board.
Unfortunately we had such a tight schedule and I couldn't test the miner

I was also able to have a look at one AvalonMiner 761 unit, as the Koreans had some amount of PSU issues
and so they brought one unit with them. The A761 has a built-in power supply unit and
it was only sold in mainland China and South Korea.
Lily mentioned that it is a test product for future AvalonMiner development.


AvalonMiner 761 with the steel case top is removed.

6) Chapter Six – Time to say farewell

After the training we went back to the office.

We had some discussions and I started working on my notes for the documentation.

From the very beginning it was planned that the documentation wouldn't be needed
to get finished during my visit in Beijing and I would finish it when I get back home in Finland.

I was given one A841 unit to help making the review and other documentation,
and then it was time to say farewell, as my plane would leave Beijing early in the following day, March 15.

When I started mining back in 2014, I never thought that I could get to see and visit like this.
I'm so thankful for Canaan Creative being interested to have me visit them and it has been great working together with them so far.

I think the documentation and other work we started here will benefit both Canaan and the miner community.

The fault rate for AvalonMiner hardware is quite low already and
there should be less need in future to send faulty machines to repair service,
when the user can fix it themself with a new spare part Canaan sends
after you have troubleshoot which part it is that you need to replace.

It takes far less time if only sending a new spare part to the user is needed.

I would like to thank Steven Mosher, Lily Han, Mr. Xiangfu Liu and rest of the Canaan team for this great visit!


Beijing Capital International Airport.

If you any questions, feel free to drop them in this thread.  Smiley

I will continue my work on the documentation and try to get the A841 review/guide ready as soon as possible.
Pages: [1] 2 3 »
Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!