AvalonMiner 841 Review: 13.0 Th/s, 1290W Bitcoin ASIC

AvalonMiner 841 Review: 13.0 Th/s, 1290W Bitcoin ASIC Here's a high-res image for you. Image credit goes to Canaan Creative. 1) General info and additional gear needed 2) Unboxing 3) Overview and breakdown 4) Setting up the controller 5) Physical setup for the miner and controller 6) Configuring miner settings 7) Performance testing 8) Tuning 9) Wrap-up 10) How to purchase Last updated on: March 24, 2018. For a detailed blog version, check this out: A nicely formatted version (March 24, 2018) can be downloaded from this link. 1) General info and additional gear needed (top) The AvalonMiner 841 is an ASIC miner for Bitcoin (SHA-256) using 16nm chip technology. Manufactured by Canaan Creative, based in Beijing, China. This is the second model from the 8th generation AvalonMiner lineup, featuring a 16nm chip named A3210HP. The A3210HP chip has improvements over the previous A3210 chip found in the AvalonMiner 821. The design tweaks lead to better power efficiency compared to the A821. Note that the AvalonMiner 841 doesn't come with a built-in controller, so you’ll need a separate controller unit, like the AvalonMiner Controller or any Raspberry Pi model to operate it. This setup allows you to connect up to 20 AvalonMiners controlled by the controller unit, with a limit of five miners per AUC3 converter.

Very nice another great guide/review. Glad your trip to the factory was successful and informative. Did you have any info about the New Warranty being offered with these units?

No, but I'm sure Steven will tell us about the Warranty details once all the details are planned. The goal will be that in most cases Canaan would send a new spare part and the user would be able to change that new part by himself. I will make a troubleshooting & repair guide as well, but it is yet a work in progress.

Sounds good I know they mention it here in the Data sheet. I'm sure Steve will be posting here at some point and give further details if there are any. https://canaan.io/wp-content/uploads/2018/03/841-datasheet.pdf If this is the current plan for warranty it more than makes up for the additional cost, and really shows their faith in the product "All Canaan products are designed to last beyond two years and we provide a two year limited warranty. Free replacement of failing parts is provided from 120 days of purchase." "Taken from the Data sheet"

HagssFIN, can you elaborate a bit more on the offset voltage. I found this https://en.wikipedia.org/wiki/Input_offset_voltage but I am a little foggy on how it applies to the miner. Especially because the miner dropped wattage a bit when at the highest offset and hashrate.

Voltage Offset in this case means changing the voltage that is supplied to hash boards a little. The Wiki page you linked is not exactly about the same subject.

Can you run a -2 voltage offset with the 1600W PSU... I suspect that a 1400W PSU being driving to 1400W is way out of it's efficiency and probably effected the power actually used.  A 1600W PSU test would tell us if that was the case or not. Thanks in advance,

Have you ran 821's & 841's on the same controller?   If so, which one would you put first in line or it doesn't matter? thanks for the write up!

You can run both 821 and 841 with same controller unit, no issues.

Nice Work Matti As always  lower power settings interest me  Since many in the USA  will try a 1500 watt atx  and 120 volts  or a pair of these 850 watt atx https://www.corsair.com/us/en/Power/txm-series-2017-config/p/CP-9020130-NA   -2        1332  is good  a pair of 850watt atx or a pair of 1000watt atx will do well -1  0 +1 SO the -2 and the -1 numbers have a bigger interest in the USA

Thanks Phil.   By the way, the nicely formatted version of this review/guide (.pdf document) is now available for download here: https://mega.nz/#!pgFTGJhB!ZvhhzJ1BEJEpC_FBJzJLA4WQG_af9jLfyO0whOCocdY

Great review matti Looking forward to meet you

Damn nice review as usual! I'll try -1 on my rack and see if I can get similar results! edit: Ok, I can confirm now that you can set the machines to -1 without any loss in Hashpower, Tested with 60 machines.

@Thetaj Thanks Thetaj.  Great. Were you able to achieve a better power efficiency level?

Asking same question  60  machines and how much  watts saved on each one.

BCT is slow as hell today. Ok, so Tomorrow I'm gonna go and take some pictures to add to the discussion. For now words will have to suffice. at 0 offset most of my machines run at around ~1300w. Keep in mind my efficiency will be better than you guys in the West because we have native 390v-->230v here. After I did -1 as per Hagg's instruction on the main post. The one I am benchmarking is still running at the same speed. But the power draw has dropped to 1260w So......60w for each machine, 60 machines = 3600w saved. not bad at all I must say. Honestly, for me these guys are giving the s9s a run for their money. But knowing Bitmain vs Canaan. I'm willing to bet at least 10% of my s9s are gonna blow a fan or controlboard in 1 year.

Nice. Did the miner temperatures also go down a little in your 60 machines setup?

Yes, but the fan's still 100%

Yeah no wonder, the 8 series has a lower target temp than earlier AvalonMiner series, because commonly the more you develop those asic chips to be better and go towards smaller node processes, the more heat sensitive they are. But it's a good thing that those temps lowered a bit, it makes it more likely for the machines to have a long lifetime.

Not suggesting to run them hot but before I pointed the intakes of my miners out my cold windows they were running crazy 35 to 39C degree intake and over 90 on the out for about 2 weeks since I was really busy with other things...   they never failed so if you end up running them really hot for a day or so I wouldn't worry tooooo much  but now that I got the intake under 15C they can run 50% fan or less and are really quiet.  Once they crawl up warmer than 15C intake, you'll see the fan start to creep up too  (for example -    Temp: 16 / 69    Fan: 3570RPM / 54%)