Avalon 8 official specs released

[lrowland21093]

As promised, here is a screenshot showing the new settings.  it is really working well now and is as quiet as the 741s.   

https://i.imgur.com/4cF1ZTO.jpg

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[akadamson]

Tried changing the frequency and so far, it doesn't work well with any setting other than 650.  I tried 600, 625. 636, and 675.  For each one I lt it try to hash for about 30 minutes and each time the overall hash rate barely got above 2TH.  Setting it back to 650 and it went back to about 11TH immediately.

My guess is that the chips on the 821 are pretty much set to only work right at the 650 frequency.  Of course, I could be doing something wrong so maybe someone else will have success.

So it looks like one setting that does work well is the "--avalon8-voltage-level".  I set mine to -1 (range is supposed to be -15 to +15) and it is running cooler by 10 degrees and the fan is staying around 65-70% with a hash rate about 9-10TH. (Plus, it is much quieter now.)  I also changed the target temp to 90 which makes the fan run more like the 741s.  I'll let it run overnight and take a screenshot tomorrow.  It will be interesting to see if there are power use differences when HagssFin retests.

Here is what I put in More Options:  "--avalon8-voltage-level-offset -2 --avalon8-temp 90 --avalon8-voltage-level -1"

I'm more than a little leary of setting the temp to 90.  Most chips today are rated for -20 to 80C, with a few exceptions that go to 105C (rare exceptions).  And because *specifically* the developers at Canaan, changed the 90 which the 741's use to 70 in the code.

I did see that overriding the voltage-level-offset made a difference, haven't tried the other, but for now, I'm going to leave mine running at a max temp of 70 and just work on keeping the inlet temp down.

[akadamson]

Further to the above, I had provided my findings to Canaan and received this email in response.

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.


Again, I wouldn't change that 70 on the temp... the fans shouldn't be a problem and it appears the undervolt will be coming out soon

[lrowland21093]

Again, I wouldn't change that 70 on the temp... the fans shouldn't be a problem and it appears the undervolt will be coming out soon

Good information from Canaan - thank you for contacting them (just gave you one of my few merit points I have to give ).  I just changed the temp target to 80 - the fan seems to be still tolerable and keeping the steady chip temp at 70 with this setting.
I agree that when they have a working undervolt that could be a better options.

[richdmz]

what is the recommended power off procedure for the AvalonMiners? I had to recently move some and I just pulled the Ethernet, wait until it spooled down and unplugged them.

Also Canaan released new firmware and controller software today for the 821.

[HagssFIN]

AvalonMiner 841 specs have now been officially released.  

There is plenty of information available in these websites and in the datasheet.

Link 1: https://canaan.io/product/avalonminer-841/
Link 2: https://canaan.io/841-released/
Link 3: https://canaan.io/wp-content/uploads/2018/03/841-datasheet.pdf

Specifications

Hashrate   13TH/s, -5% ~ +10%
Power Consumption   1290W, +0% ~ +20% @ 13TH/s, 25°C, 93% PSU Efficiency, 12V AC, Wall-Plug
Power Efficiency   0.099J / GigaHash Wall-Plug
Rated Input Voltage    12 ~ 12.6V
Chips   104 x A3210HP 16nm ASIC
Frequency   Smart Speed
PSU output pins    8 X 6PIN
Network Connection   AUC3 + AUC3 I2C to AvalonMiner Controller
Controller   AvalonMiner Controller
AUC3   Up to 5 devices / AUC3, Daisy-Chain Connection
Operating Temperature   -5℃ ~ 30℃
Air-intake Temperature   -5℃ ~ 30℃
Cooling   1 x 12038 FAN, 6000RPM
Noise   0 ~ 65db
Dimensions    370mm x 150mm x 136mm
Gross Dimensions    430 mm x 215mm x 205mm
Net weight    4.7kg
Gross weight   5.2kg

[WBF1]

what is the recommended power off procedure for the AvalonMiners? I had to recently move some and I just pulled the Ethernet, wait until it spooled down and unplugged them.

Also Canaan released new firmware and controller software today for the 821.

Anyone tested it yet?. I don't want to be the first canary in the coal mine, so to speak.

[richdmz]

i been running the new controller and firmware on my units since the release yesterday, no issues so far

[WBF1]

Any improvements?

[richdmz]

Any improvements?

I did not notice anything specifically, my units are performing the same and I didn't see a change with the metrics...here is a list of changes the firmware implemented...some are behind the scene stuff

Fix the led doesn't display red when the miner too hot
Fix the INVALIDPMU and HUFAILED display when the miner is running
Update the miner too hot protection
Optimize temperature and voltage reading
Add overclocking info support

[richdmz]

I wonder with the new updates if Canaan still recommends setting the minimum fan to 100%

It does say under CGMiner Configuration, Minimum Fan%(Range: 0-100, Default: 10%)

but I can't remember if the original controller image had the same 10% default listed.

[akadamson]

I wonder with the new updates if Canaan still recommends setting the minimum fan to 100%

It does say under CGMiner Configuration, Minimum Fan%(Range: 0-100, Default: 10%)

but I can't remember if the original controller image had the same 10% default listed.

because the max temp is 70 on the 821, not 90 like the 741, you will find that if you can't keep the inlet temp to 27 or less, that the fan is going to run at 100% anyway.

The compromise I made was set it to 70 instead of 100.  But unless the environment they are running in is really cold, the fan is going to run up to 100 pretty much anyway.  And I don't think I'd let them run about 75 for very long, the chips they use are very sensitive to over temp and one of the recent changes to a fix to set the over temp condition.

[mgoz]

Anyone bypass the AUC3 yet? I've seen a few pi controllers floating around that say they bypass for Avalon 8, but appear to be older 4-pin that Parallel Miner was selling.

[Thetaj]

just received my batch of 841s today. I managed to plug in about 60 of them. All I can say is.......WOW! Canaan, you guys did not fail to amaze again!

Although pricier than the S9s, the quality is top notch and every single one out-performed the advertised specs!

[DPoS2]

just received my batch of 841s today. I managed to plug in about 60 of them. All I can say is.......WOW! Canaan, you guys did not fail to amaze again!

Although pricier than the S9s, the quality is top notch and every single one out-performed the advertised specs!

Hows the temp/fan situation?  Can you drop the min rate to 50% or is it going to be full blast 100% no matter if you freeze them?

Are you running them with your 821's in daisy chain or separate controller/AUC3?

Cool you got them up already

[Thetaj]

just received my batch of 841s today. I managed to plug in about 60 of them. All I can say is.......WOW! Canaan, you guys did not fail to amaze again!

Although pricier than the S9s, the quality is top notch and every single one out-performed the advertised specs!

Hows the temp/fan situation?  Can you drop the min rate to 50% or is it going to be full blast 100% no matter if you freeze them?

Are you running them with your 821's in daisy chain or separate controller/AUC3?

Cool you got them up already

It is still going full blast. Although the intake and outlet temps are far below that of the Avalon 741s. I tried to set the max fans to 90% but it doesn't seem to work

I don't have any 821s but I daisy chained 15 of them per each controller and it works great! (better than the 741s which loses some hash after 10)

[Thetaj]

since Haggs is definitely going to make a way better review than me, here's my small contribution these things ain't no joke yall.

[richdmz]

It is still going full blast. Although the intake and outlet temps are far below that of the Avalon 741s. I tried to set the max fans to 90% but it doesn't seem to work

I don't have any 821s but I daisy chained 15 of them per each controller and it works great! (better than the 741s which loses some hash after 10)

have you tried chaining 20 A841s?  How much hash did you lose? Surprise Canaan recommends 20 per controller if there is loss of hash.


Moderator's note: This post was edited by frodocooper to remove multiple nested quotes.

[Thetaj]

have you tried chaining 20 A841s?  How much hash did you lose? Surprise Canaan recommends 20 per controller if there is loss of hash.

around 2%. I have tried but it wasn't really that stable.


Moderator's note: This post was edited by frodocooper to correct erroneous quote formatting.

[ccgllc]

around 2%. I have tried but it wasn't really that stable

Fascinating.  Guess I'll stick with my plan to use up my old Raspberry Pis and keep the chains short.  Any idea is the hash loss is caused by under performance of the Pis, or something else?  Just wondering if I should spend the relative pennies and buy faster Pis?