Topic: (Review/Guide) AvalonMiner 821 11.0 Th/s, 1200W Bitcoin (SHA-256) ASIC miner (Read 2940 times)

@deusopus
Sorry for a late reply, I'm not too frequently active here nowadays.
Can you post your Cgminer API log? And I mean the full log one (there was a tick box or something to choose less or more detailed log).

hello,
great thread. i've been running some 821s that i inherited from a guy for about a year and i decided to point them at a different pool for shits and giggles and corrupted my controller. now i need to reset my controller, i think i have it mostly i used the following links to get the image...

https://download.canaan-creative.com/avalon821/openwrt/

anyways, now i have the controller setup but im only getting a small amount of hashing. i think it has to do with the "more options" setting in the cgminer tab?

can someone corroborate this? i observed some settings there before i lost my last controller setup. can someone tell me how to tweak it out?

i've got three 821s and ive got them daisy chained under one worker and im using braiins pool. i was getting them to scream before and i was able to get reported hashrates close to 50TH/s

please can someone help me walk through the situation and reset my setup.. here is a view of my mining operation
https://youtu.be/YMr9G21jbUM?si=wDbpbJlg25bmTNPz

Does anyone know what is the lowest setting on the 821? I just tried playing with --avalon8-voltage-level 1-5 with no luck.
I know on low power you get about 9TH but the temps are still too high and was trying to get lower if possible.

Thanks

Yes they did, work perfect.

They are good.

Hello

i'm looking for some auc3 cables , did these ones https://www.amazon.com/Uxcell-a14061000ux0624-Female-Jumper-Connector/dp/B00O9Y80AK work well for you ?

yeah if it does not work just flip one end as most likely you plugged one end in wrong.

Thank you Philipma1957 I ordered the ones you use, they seemed easier and the right length.

here is a kit  with

2x 2
2x 3
2x 4
2x 5
2x 6

https://www.amazon.com/XLX-10PCS-Cable-Double-end-XH2-54mm/dp/B076HK1W1Q

I use these

https://www.amazon.com/Uxcell-a14061000ux0624-Female-Jumper-Connector/dp/B00O9Y80AK

Awesome, Thank you!

No problem.

I assume that you have the AUC3 Converter, but no cable.

If there is no original cable available to buy, you can make your own by using a generic 2.54mm pitch jumper cable.

Here is an example https://www.makerstore.com.au/product/elec-ff-jump-10/

You must do a straight connection from a pin to pin.

Sorry to revive an old post but does anyone know where to pick up some 5-pin AUC3 cable?

Thanks

Just to say to HaggsFin thanks for the link to cryptouniverse. Picked up a few Avalons and happy with their service and their price.

Many thanks for the quick answer. Sorcerer it will be, I will look at the EU supplier, thanks for the link.
The 2880 were great but having not bought any for 3 years am shocked by the big price increase (They were 35 USD each when I got them in 2015), now makes more sense to get something dedicated like the Sorcerer so no need for breakouts/PCIE cables etc.
All the best
Andy

@AndyM456
Thanks.  
Yep. I would like to say that please don't buy a ATX psu.

My two good choices that I can recommend for both A821 and A841:

• Canaan Creative - Sorcerer PSU 1600W power supply unit. You can buy this from an official Canaan partner/distributor. https://canaan.io/official-distributors/
• Dell/Delta Electronics/Lite On - DPS 1200 MB 1400W server power supply kit - https://www.deepinthemines.com/collections/power-supplies/products/bitmain-antminer-d3-s7-s9-94-platinum-1400w-psu-power-supply-complete-kit-220v-240v

If I understood you right and you are located in Europe,
I can definitely recommend you this Canaan partner in Vienna, Austria (EU area): www.cryptouniverse.at

The sorcerer's work great. The fans higher pitch is noticeable over the miners but not bad. I have 6 and so far zero problems though of course the PSU has only been out less than a year.

Thanks for the great review, I read it and have just ordered some 821s. How are the Sorcerer PSU that Canaan provide, not fussed about noise more about how reliable they are. Have been using 2880 but cannot get the breakout boards from J4bberwock anymore in Europe so want to change to "normal" PSU.
Was thinking of either Sorcerer or some standard Corsair or Seasonic ATX PSU.
Any advice welcomed.
Thanks
Andy

https://canaan.io/product/avalon-821-841-bundle-qty-40-shipping-now-100-per-thash/

There is now a great Th/s price deal for guys interested in buying 40 or more miners.

40 x  Avalon 821
4x  Avalon 841
3   x  AvalonMiner Controller

$44000 USD

Darn, here I was hoping that I'd be able to do some reviewing (although reading all your past reviews, I think you'll do a far better job than me, lol)

---

Moderator's note: This post was edited by frodocooper to update the quoted post from HagssFIN.

I have received a A841 sample unit from Canaan and I'm working on the review for it.  

---

Moderator's note: This post was edited by frodocooper to remove an off-topic portion of the post.

Will you start a new thread for your A841 review and testing? Do you have an estimated ship date for your A841? Are you in the April 15th-April 30th batch that I see mentioned on the BlokForge website, or perhaps something sooner?

I am very interested in how this plays out, as you can probably tell by my questions....

I'll let you guys know and I will do a thorough testing for the A841 to find out what is the best performance we can get out of it.
Phil, with your estimate I think you are quite close to what could be the actual number for the power efficiency when the voltage offset is -2.

Nice work.  I got a notice for the 841's but I will not be buying in bulk.

They say the 841 does 0.099 watts per gh on 0 offset   I am thinking it will do 0.092 on  -2 offset

Let us know when you get one.

No issues so far, it just keeps on hashing steady. 

Any new updates on your experience with Avalon 821? 

I wanted to try out this new platform and the review is now also available in the Steemit blogging website.
Link: https://steemit.com/review/@hagssfin/review-guide-avalonminer-821-11-0-th-s-1200w-bitcoin-sha-256-asic-miner

I'm still going to continue as before. Posting here at the Bitcointalk.org forum is my priority number 1.

You seem to have a pretty good relationship with Canaan.  I think it would be worthwhile to ask if the undervolt stuff is good for these miners or not.  

Here is a copy of an email that I got from then when I asked about potential bugs in the firmware.

"e.g. there is an option to set a -2 to 1 voltage offset, this worked with the 741s, but with the 821, that option is there in the web interface, but the command that is actually used to start the miner,
*always* forces the 0 offset and ignores the value set in the web UI.
>> This option is for A741, sorry for we didn't delete this function from A821's firmware.

There is one other around the min fan speed, it defaults to 100%, what probably makes more sense is to set to that 50 by default.  The outlet temperature is set to 70, where as on the 741 it was 90, because of this with the default min fan set to 100%, the fans run at 100%  speed whether they need to or not.
>> We locked the fan speed in the A821 firmware since its chips cannot take high temperature.
"

You'll see my question and their response..  It is worthy of note - there are *2* voltage options on the 821, the 741 only had one.  It could be they referenced the other one when they sent that I just don't know.  I know it works if you change it to add to the commandline, but what I don't know is if there might be damage that could be caused by using it?

Just a thought.

Yes. Steven has told that the A841 power efficiency should be even better. 

So the -2 setting is  very low .1064 per gh. At the wall.

This is better then the s-9

The 841 May do 0.0975 at the wall.

---

(Moderator's note: This post was edited by frodocooper to trim the quote from HagssFIN.)

I have now updated the extra chapter 'extra) Testing different voltage offset values and writing down miner performance results'.
This time the test was successful and I got some nice results.  

Link: https://bitcointalksearch.org/topic/m.30217488

Thanks for your comments lrowland21093 & akadamson!

---

I have also updated the nicely formatted version with all the recent changes.

The nicely formatted version of this review/guide (February 25, 2018 version) is available for download in my Mega cloud.

Link:
https://mega.nz/#!Zl8zlRSZ!8JKeDllHjtBPUW3ctF3Rap-Dau4TqAVPR6Voy-bS4B0

I do have a sorcerer hooked up to this one, another PSU is coming today for the other one.  I base it off listening from the other side of the door as well as from the street as the hot air is exhausted out with the fan...it's not a whole lot quieter but it is noticeable. 

A little... ... Sheesh the sorcerers are louder!  lol

These guys are a little quieter than the s9's...to my untrained and slightly deaf ears.   

Here are the 8 options - Make sure you select the Avalon8 branch to see the version shipped with that firmware

starting at line ~1500

https://github.com/Canaan-Creative/cgminer/blob/avalon8/cgminer.c

Thanks! This is a good observation.
I feel stupid not checking if it actually applied the changed voltage offset value.
It is so easy to see at the Processes page.

I will re-do this 'extra chapter' I did later on and test it by inserting voltage offset values
from -2 to +1 using the Cgminer command --avalon8-voltage-level-offset -2.

I posted a note about the voltage offset in the Avalon 8 official specs thread (https://bitcointalksearch.org/topic/m.30730555).
It looks like the values for voltage offset enter on the CGMiner Configuration page are being ignored and the offset and some other settings are getting applied to the command line of the cgminer.  
Try entering a value there other than zero and look in Processes - at the bottom of the list you should see the cgminer command line and it always has offset of 0 hardcoded.  It looks like we can override if we use "More Options" with "--avalon8-voltage-level-offset -2" (figured that out by taking akadamson suggestion and then finding the developer documentation for cgminer on Canaan's github.

For those who don't know or are new to this, the command line options can be found here (just look for the avalon7 options and maybe the options for avalon8 will be similar):  https://github.com/Canaan-Creative/cgminer/blob/master/README

So far it is running around 80% fan speed (it was 100% before) with chip temp at 67 C.  The hash rate is staying between 10.5 -10.8TH - with the offset of 0, it was 11.2-11.5TH.
Overall it is much quieter.

I don't have a way to test the power usage so if someone else does, it would be a good thing to test.

Thanks.
Unfortunately I don't have a proper sound level meter,
but I'm estimating that the noise level is at least 65dB (as advertised at www.canaan.io) , when the cooling fan speed is 100%. Most likely 1m distance is used for the advertised noise level measurement.

Thank you and great review on the 821. Just what i was looking for.
I noticed that the fan is running at 100% all the time and was interested in the noise levels
Are you able to show the decibels these units produce.

Cheers

Geronimoe

Thanks Phil! Much appreciated. 

My one complaint is that pdf is  pretty much perfect

I sent you 7 Merit points as  it is a beautiful piece of work.

Edit (February 25, 2018): This is now an old version, see the opening post for the most recent version download link.

The nicely formatted version of this review/guide is updated (February 17, 2018 version) and it is available for download.

Link:
https://mega.nz/#!Qlc0gZBK!rq7BT7MViP4vvNKsYsEXlHHHHaVKHeacxuB0aQOXrx4

I think if you look at the above, you'll see that -2 on the 821 isn't the same as -2 on the 741.  Most are reporting *higher* hashrate and wattage at -2, than 1.  Makes ya wonder if they got the values reversed in their firmware...

Got my Avalon 821 up and running for 48 hours. Software lets me adjust voltage and with -2 the miner still runs with 11,34TH/s. Superstable:)

Thank you, much appreciated.  

Nice to know that Blokforge orders have started shipping.

Excellent review!
Got notice yesterday from Blokforge my 2x 821's are on their way via FedEx, should arrive next Tues. Good timing on that as 1 of my old s9's (b3) decided to go off line for a few hours today...

I don't know if this is the first, but this is one of the engineering sample units without a tech specs label printed on the miner.

Nice pics & review. Out of sheer curiosity, I wish you had taken pictures of the other side of the 2 PCBs that hold the PCIe power connectors   It looks like you might have the first 821 released to the public. Is this correct?

Yeah, they might switch their focus into the A841 model quite soon, which will be most likely at least 13 Th/s with 1200W power consumption.

ASIC chip for the A841 model will be the same one used in the A821 (A3210).

Seems like 821 will be EOL soon. Just received Canaan newsletter about shipping 841 in April. The performance is estimated to be 13TH and 1200 Watts.

Hopefully Canaan comes with a similar software tweak to improve the voltage offset effect in the A821 performance.

The 741  got a software tweak  and the offset  improved.

My guess is the 821 will be tweaked for fan and power use.


Nice gear same solid heat sinks as older models.  Price is high  but I may order  in the future.

Thanks.

Video tutorial links updated, there are now two tutorial videos available.

Nice review Haggsfin, I'm a little surprised with the voltage offset results.

Thanks for the great report.
I hope in future Software updates the fans can be adjusted to auto mode so they do not run 100% all the time due to noise level. Or temp limits could be adjusted.

extra) Testing different voltage offset values and writing down miner performance results
Note: This extra chapter is updated in February 25, 2018.
This is a second and successful attempt to test the voltage offset values.

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.

The original review was done with the default setting for the voltage offset, which is 0.
I will go ahead and test the miner with every available voltage offset value.

I will let the miner run for at least one hour and then I look 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.

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 about 1200 - 1300W area, and the hash rate was in 11.2 - 11.4Th/s area.

Best power efficiency results were achieved with the voltage offset value -2.

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	11.23	1195	0.1064
-1	11.21	1222	0.1090
0	11.36	1249	0.1099
+1	11.39	1295	0.1137

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.

---

Note: This failed attempt in February 13, 2018 to test different voltage offset values was failed, because the A821 did not actually apply the voltage offset value setting set in the cgminer configuration page. After good discussions in this thread I realised that we need to add the voltage offset value manually as a cgminer command in the 'More Options' field to get it to work properly. Thanks to lrowland21093 & akadamson for pointing this out.  

Failed attempt, February 13, 2018 - Testing different voltage offset values and writing down miner performance results

The original review was done with the default setting for the voltage offset, which is 0.
I will go ahead and test the miner with every available voltage offset value.

I will let the miner run for at least one hour and then I look 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.

Source: https://canaan.io/question/in-the-controller-dashboard-what-does-the-voltage-offset-option-do/

I got kind of mixed results after I had tested the performance with each voltage offset value.
Changing the voltage offset value did not have such a huge effect on the AvalonMiner 821 power consumption or performance.

This is different from what we have seen with previous AvalonMiner generations.
With previous generations the highest voltage offset value has resulted the highest hash rate and highest power consumption.
And the lowest voltage offset value has resulted lowest hash rate and lowest power consumption.

Hash rate was little different with each voltage offset value, while the power consumption remained about the same all the time.
Best hashrate and efficiency results were achieved with voltage offset value -2.

Voltage offset value	Hash rate (Th/s)	Power consumption (W)	Power efficiency (J per Gh/s)
-2	11.50	1281	0.1114
-1	11.44	1278	0.1117
0	11.37	1278	0.1124
+1	11.38	1277	0.1122

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.

Nice review.

So you tested at 0 offset correct?

does this gear offer

+1
0
-1
-2

options as did the 721 and 741?


I am curious  to see if the -2 and or -1 offset  get us to .1 at the wall or even 0.098 at the wall

.11  at the wall is pretty much equal to or better then an s-9


Alas the price point is very high I may not order any.

35000 usd for 10 units  delivered in march  is far too much money for me.

@ Logan4el
I might look into it later.


I tried my best using my Microsoft Word skills and I made an nicely formatted version of this review/guide,
which is more pleasing to eyes and can be printed to paper easily if needed.

Link is available in the opening post.

Might be interesting to see if it works with voltage offset +1 and what is the hashrate and power consumption.

Thanks for the comment. It is just because of the way Canaan has programmed the fan control algorithm in the firmware.

Thank you for review. Why your fan is running at 100% with such a low temperatures 27 / 75 ?

(Review/Guide) AvalonMiner 821 11.0 Th/s, 1200W Bitcoin (SHA-256) ASIC miner

Click for a bigger version. Picture copyright (c) Canaan Creative.

1) General information, other items needed
2) Unpacking
3) Overview
4) Controller unit setup
5) Physical setup for the miner and controller
6) Configuration
7) Testing
8] Power consumption measurement
9) Conclusion
10) How to order

Last updated in: February 25, 2018.

Steemit blogging website:
https://steemit.com/review/@hagssfin/review-guide-avalonminer-821-11-0-th-s-1200w-bitcoin-sha-256-asic-miner

Nicely formatted version (February 25, 2018) is available for download here (Mega.nz cloud service):
https://mega.nz/#!Zl8zlRSZ!8JKeDllHjtBPUW3ctF3Rap-Dau4TqAVPR6Voy-bS4B0

1) General information, other items needed (top)
AvalonMiner 821 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 a 8th generation AvalonMiner, and it uses a new generation 16nm Bitcoin ASIC chip called A3210.
This new generation ASIC chip makes this miner more power efficient than the previous, 7th generation AvalonMiners.

AvalonMiner 821 does not have a built-in controller included and you need a separate controller, AvalonMiner Controller or any of the Raspberry Pi versions to run it.
A nice feature in my opinion is that up to max. 20 AvalonMiners can be chained to be controlled by a Raspberry Pi controller unit.
This saves you some money with network infrastructure cost if you have a large mining operation.

AvalonMiner 821 weights 4.7 kg and outer dimensions are 370mm (L) x 150mm (W) x 136mm (H).
The nominal hashrate is 11.0 Th/s with a nominal power consumption of 1200 Watts.

This is a review and a unofficial setup instructions guide for the AvalonMiner 821.

Technical specifications:

Code:

AvalonMiner 821

Hash rate: 11.0 Th/s, -5% ~ +10%
Power consumption: 1200W, +0% ~ +20% @ 11TH/s, 25°C, 93% PSU Efficiency, 12V AC, Wall-Plug
Power efficiency: 0.109J / Gh/s Wall-Plug
DC voltage input: 12 ~ 12.6 VDC
ASIC chip type: A3210 (16nm SHA-256 ASIC chip)
ASIC chip quantity per unit (miner): 104 chips
Number of hash boards per unit: 4 hash boards
Cooling: 1x 120mm x 38mm 12VDC 2.7A fan; manufacturer & model: Delta QFR1212GHE (mounted in rear for a pull configuration).
Weight: 4.7 kg
Dimensions: 370mm (L) x 150mm (W) x 136mm (H)

Other items needed:

• A server grade power supply with at least 8x PCI-E 6-pin connectors,
  every connector with a dedicated cable, preferably at least 16AWG wire gauge.
  I used a 1600W power supply called Sorcerer Power Supply Unit to power my miner.
  This is an official custom power supply manufactured by Canaan Creative.
• C13 power cord suitable to your country's electrical socket
• AvalonMiner Controller or Raspberry Pi.
• 5V  2.4A USB wall wart for the Controller.
• Micro USB cable between controller and the 5V 2.4A USB wall wart.
• Ethernet cable to go from the controller to your router/switch.
• Computer to set initial pool and configuration settings.

2) Unpacking (top)
I received this AvalonMiner 821 as a sample unit for this review.
It doesn't have the info label printed on it, but this is a ready mass production unit for sure.

Packaging was good as always with Canaan hardware.
Sturdy design and lots of foam to protect the miner.

Using DHL Express for the delivery was nice and fast.

The packaging principle pretty much goes along same principles as it was with the previous 7th generation AvalonMiner.
(See chapter 2 in this A741 review thread: https://bitcointalksearch.org/topic/reviewguide-avalonminer-741-73-ths-1150w-bitcoin-sha-256-asic-miner-2588105).

3) Overview (top)
In these following pictures you can see the AvalonMiner 821, AUC3 converter and Sorcerer Power Supply Unit.
Click the picture to show a bigger picture. Pictures taken by HagssFIN.





   

I had pleasant previous experience buying hardware from official distributor Cryptouniverse, so I bought one Sorcerer Power Supply Unit from them for this A821 setup.

I bought a C13 to Type F (schuko) power cord for the power supply.
Please make sure that the C13 power cord has a high amp rating.

I also had to buy a wall wart for the controller unit and a Micro USB-USB A Cable.
Please make sure that the cable is a 'fast charging cable' with high amp rating.

Same as with the A741 review I did previously, I also did a disassembly for this AvalonMiner 821 unit and I took a ton of pictures.
The disassembly and assembly for the A821 is quite easy, only one screw driver (with Phillips screw head tip) is needed.
The miner design continues the same style as with previous AvalonMiner 7 generation and it is really sturdy and effective in terms of cooling effect.

AvalonMiner 821 disassembled. Click for a bigger version. Picture 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 software is already installed on the Micro SD card.


AvalonMiner Controller. Click for a bigger version. Pictures taken by HagssFIN.

2. You can build one yourself by using a Raspberry Pi 3 and other supplies.

So in this next part I'm gonna show you how to build a controller by myself,
using a Raspberry Pi 3 single-board computer and some other supplies.

It's really easy to source these parts needed and I used my local electronics store to find these supplies.

Here is my shopping list:
• Raspberry Pi 3
• Transparent plastic case for the Raspberry Pi 3
• 8GB Kingston Micro SD card
• 5VDC 2.4A USB wall wart
• USB-A to Micro USB-B cable


Supplies. Click for a bigger version. Pictures taken by HagssFIN.

Here are the instructions for doing the controller setup from scratch.

Instructions:

1.
AvalonMiner Controller’s firmware supports the following types of Raspberry Pi single-board computer:
• AvalonMiner Controller (Canaan Creative)
• Raspberry Pi 1 Model B
• 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 and 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.
We need a SD card reader.
When you buy a 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 in my PC case front panel. Click for a bigger version. 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/avalon821/openwrt/latest/rpi1-modelb/openwrt-brcm2708-bcm2708-rpi-ext4-sdcard.img
Raspberry Pi 2 Model B Firmware:
https://canaan.io/downloads/software/avalon821/openwrt/latest/rpi2-modelb/openwrt-brcm2708-bcm2709-rpi-2-ext4-sdcard.img
Raspberry Pi 3 Model B Firmware:
https://canaan.io/downloads/software/avalon821/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 bigger version.

7.
First click the folder icon.
Then locate and select your downloaded Openwrt firmware for the Raspberry Pi.

Click for a bigger version.

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

Click for a bigger version.

9.
Wait for the process to complete.

Click for a bigger version.

10.
When the following message is displayed, your program was successfully written.

Click for a bigger version.

Click ok and exit.

If you followed these steps successfully, your controller is initially completed.

5) Physical setup for the miner and controller (top)
Connecting everything together is quite simple, if you are familiar with ASIC miner hardware.
I tried writing these instructions simple as possible by using specific step pictures as help.

1.
Connect 5V power to the controller unit.

Click for a bigger version.

2.
Connect Ethernet cable to the controller unit.

Click for a bigger version.

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

Click for a bigger version.

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

Click for a bigger version.

5.
Connect the other end of the 5-pin AUC3 cable to the miner unit.
If you have more than one miner unit, you can daisy chain max. five miners per one AUC3 converter
and you can connect max. four AUC3 converters to one controller unit.

Click for a bigger version.

6.
Connect eight pieces 6-pin power cables with invidual cabling to the miner.
I would strongly advice using a server grade power supply with at least 1400W power capacity.
In this setup I'm using the official custom power supply unit, Sorcerer Power Supply Unit.
It is able to handle max. 1600W power capacity with 230V mains voltage electricity here in Finland.

Click for a bigger version.

7.
Plug in the 5V USB 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.


If you like a video tutorial better, there are two good A821 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 OG).

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)
You can follow these instructions for the controller configuration:

1.
Connect the power to the controller, and make sure the controller and computer is configured to be connected to the same network.
(You can also use the controller connected directly to the computer with a network cable).

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.

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

4.
There is initially no password, so you can enter after click Login Overview screen.

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, 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.

Canaan Creative controller instructions for the A721 and A741:
https://canaan.io/question/how-do-i-connect-an-avalonminer-721-and-avalonminer-controller-including-raspberry-pi-1-2-and-3/

These same instructions can also be applied in the A821 controller setup process.

7) Testing (top)
After I was ready with all the setups and configurations, it was time to test the miner.
Mining was started using the default settings.
The average hash rate was after close to two hours running time was 11.2 Th/s.

The advertised hash rate for the AvalonMiner 821 is 11.0 Th/s, so this unit is definitely performing as good as advertised plus additional 0.2 Th/s.


Status page. Click for a bigger version.

8] Power consumption measurement (top)
I had two test runs for power consumption measurement and I got slightly different sets of results.
The power measurements were done with Perel E305EM6-G energy meter.
The miner was set with default settings. Voltage offset default value is 0.

Perel E305EM6-G technical specs data sheet (.pdf document): https://www.perel.eu/downloads/22/e305em6e305em6ggbnlfresdptpl.pdf

Perel E305EM6-G. Click for a bigger version. Picture taken by HagssFIN.


Power measurement, first test run. Click for a bigger version. Picture taken by HagssFIN.

Stable result for the power consumption (at wall) was 1247 W,
when the hash rate was about 11.2 Th/s.

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

1247 / 11200 = 0.1113 J  per  Gh/s.

These performance results can vary in about 11.0 - 11.5 Th/s area with 1200 - 1299W area power consumption.

I had another test run in which I got little different results.

Power measurement, second test run. Click for a bigger version. Picture taken by HagssFIN.

Stable result for the power consumption (at wall) was 1278 W,
when the hash rate was about 11.36 Th/s.

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

1278 / 11360 = 0.1125 J  per  Gh/s.

All in all these performance results are a great improvement compared to the previous AvalonMiner generation
and the power efficiency is now almost as good as with the Antminer S9.

9) Conclusion (top)
This new generation AvalonMiner is a great thing for the ASIC miner market competition.
It is close to same power efficiency as the market leader, and if it is anything like previous AvalonMiner generations,
we can expect it to be a reliable piece of gear.

Looking at this unit closely and disassembling it convinced me about the robustness.

Canaan continues keeping the reliability as their primary goal in the miner design,
while the price tag might not be the cheapest one in the market.

Personally, I place a high value for quality in the miner design, because it results in reduced repair need, repair cost and down time.

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

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


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

If you want to buy less than 60 units, you will need to order from your local official Canaan hardware distributor.

You can find the up-to-date official distributor list here: https://canaan.io/official-distributors/

Canaan Creative: www.canaan.io