Bitcoin Forum

Bitcoin => Hardware => Topic started by: philipma1957 on April 23, 2018, 12:17:05 PM



Title: My review of Avalon 841 .
Post by: philipma1957 on April 23, 2018, 12:17:05 PM
It is  being shipped by DHL and is due on Weds.

Buysolar  went to Beijing  last week  did training.

The are shipping a 841 for us to test.
They also demoed a racking system prototype.

We are getting the 841 and will be testing it and demo with some youtube and various psus.

I am curious to see if -1 setting using a corsair 1500 watt titanium will yield lowest watts per gh.
Our cooling at the solar array  keeps temps at 95f or lower in summer.  It should be interesting to see if it holds up at that temp.

DHL says item arrives on weds the 25th.


Title: Re: My review of Avalon 841 No Info yet.
Post by: mgoz on April 23, 2018, 02:16:19 PM
If room temp is 95F I think you will have problems. I have one that rarely runs longer than 24 hours in 20C and unit intake temp is constantly at 28-30C for some reason. Will just go into idle status and not start hashing again until I cycle PSU. Another 841 in same environment runs fine. May be luck of the draw where some of these are more sensitive than others. I may also have a dud, but I'm interested in seeing others room vs intake temps.


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 23, 2018, 02:27:07 PM
If room temp is 95F I think you will have problems. I have one that rarely runs longer than 24 hours in 20C and unit intake temp is constantly at 28-30C for some reason. Will just go into idle status and not start hashing again until I cycle PSU. Another 841 in same environment runs fine. May be luck of the draw where some of these are more sensitive than others. I may also have a dud, but I'm interested in seeing others room vs intake temps.

Well it won't hit 95f  until the summer or late spring.

but it will get there.


Title: Re: My review of Avalon 841 No Info yet.
Post by: taserz on April 23, 2018, 02:40:03 PM
It is  being shipped by DHL and is due on Weds.

Buysolar  went to Beijing  last week  did training.

The are shipping a 841 for us to test.
They also demoed a racking system prototype.

We are getting the 841 and will be testing it and demo with some youtube and various psus.

I am curious to see if -1 setting using a corsair 1500 watt titanium will yield lowest watts per gh.
Our cooling at the solar array  keeps temps at 95f or lower in summer.  It should be interesting to see if it holds up at that temp.

DHL says item arrives on weds the 25th.

avoid 95f+ it will kill hashboards... been there


Title: Re: My review of Avalon 841 No Info yet.
Post by: HagssFIN on April 23, 2018, 03:10:09 PM
Cool, looking forward to hear more from both you and buysolar.  :)


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 23, 2018, 03:47:48 PM
Well if the gear can't run in a 95f room.

Then the T1 may end up to be what I need.

I can keep room at 95f in the summer if it is 98f real world temp.

Basically I can get the room 3 f cooler then outside temp once outside temps gets into 90's

So maybe it fails. maybe it does not

maybe I add more fans or one more heat shield


Title: Re: My review of Avalon 841 No Info yet.
Post by: Megaquake on April 23, 2018, 06:08:56 PM
You may or may not get the results you are looking for right now I have two running in my basement, here are the temps they are running with a -1 offset 32/75 and 31/77 with a suction pulling cool air in and most of the heat out, I live about an hour SW of Pittsburgh, PA.

here is a pic from earlier today and a bit cooler

https://i.imgur.com/G8eqFmT.jpg

Here are the S9 temps each board 82/75/75



Moderator's note: This post was edited by frodocooper to remove inline image tags and an unnecessary quote.


Title: Re: My review of Avalon 841 No Info yet.
Post by: lrowland21093 on April 23, 2018, 10:07:03 PM
I am not sure if this is helpful but it does work well for me.  There is a fairly easy way to manage times where there is a bit of excessive heat.  Put the Raspberry controller's power on a WiFi enable "smart switch" and then connect the switch to IFTTT (If-This-Then-That) running on a tablet or phone.  The write two scripts that turn off and then on the power to the controller when the temperature gets to a certain point (you can use Weather.com or you can buy a sensor for the room where the miner is). 
The benefit of this is you are not cutting power on and off the miner, just the controller.  The Wifi plugs are really cheap now too and IFTTT is a free app.

My miners go off when the outside temp goes above 90 and then back on when it drops below 85.  This means they turn off during the hottest part of the day (electricity is in demand then anyway).  Here is a good article on IFTTT: https://www.cnet.com/topics/smart-home/best-smart-home-devices/best-ifttt-compatible-gadgets/
and here are some good prices on compatible smart plugs:  https://www.amazon.com/s/url=search-alias%3Daps&field-keywords=wifi+smart+plug+ifttt



Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 25, 2018, 01:02:46 AM


It is funny but it appears that all three big miners have issues.

S-9 breaks a lot
T-1 does not do full specs
Avalon 841 wants to be in a 86f room


Title: Re: My review of Avalon 841 No Info yet.
Post by: Blokforge on April 25, 2018, 01:20:15 AM


Avalon might use more power over 30C, specs pertain to 30C usage.

Still best machine on the market.

These two have been running fine at this temp.


https://i.imgur.com/9BaP31a.jpg



Title: Re: My review of Avalon 841 No Info yet.
Post by: akadamson on April 25, 2018, 01:34:28 AM
Avalon might use more power over 30C, specs pertain to 30C usage.

Still best machine on the market.

These two have been running fine at this temp.

[...]

WOW... and I baby mine watching for over 30C inlet too :(...

I wonder if those would run that way with the latest firmware... you guys have one you can put the latest MM code on and run and let us know... that would be a really interesting datapoint where it's suppose to have the over temp shutoff fixed, etc.



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


Title: Re: My review of Avalon 841 No Info yet.
Post by: Blokforge on April 25, 2018, 02:08:26 AM
We can run one with updated firmware as well, going to leave these as is so there is no auto shutoff.


Title: Re: My review of Avalon 841 No Info yet.
Post by: akadamson on April 25, 2018, 02:44:16 AM
We can run one with updated firmware as well, going to leave these as is so there is no auto shutoff.

awesome, run all 3 side by each and let us know, that would really be interesting to know.


Title: Re: My review of Avalon 841 No Info yet.
Post by: NotFuzzyWarm on April 25, 2018, 11:37:35 AM
Avalon might use more power over 30C, specs pertain to 30C usage.

[...]

Might? ;) as I posted in the 841 specs thread (https://bitcointalk.org/index.php?topic=2616205.msg35358219#msg35358219) the 2x 841's in my basement right now are in a 90F ambient and

... running at those temps seems to come at a price: power usage. After running several tests, with a solid 230V coming from my always on-line UPS's both ones from Cyberpower and Tripplite reports typical power using -2 offset as 1.51KW - all long way away from much lower power reported by others when running in lower temps.

Nice to know temps could be pushed higher but ja power consumption def goes up.



Moderator's note: This post was edited by frodocooper to trim the quote from Blokforge and to correct erroneous quote formatting.


Title: Re: My review of Avalon 841 No Info yet.
Post by: Blokforge on April 25, 2018, 03:22:00 PM
Might? ;) as I posted in the 841 specs thread (https://bitcointalk.org/index.php?topic=2616205.msg35358219#msg35358219) the 2x 841's in my basement right now are in a 90F ambient and

... running at those temps seems to come at a price: power usage. After running several tests, with a solid 230V coming from my always on-line UPS's both ones from Cyberpower and Tripplite reports typical power using -2 offset as 1.51KW - all long way away from much lower power reported by others when running in lower temps.

Nice to know temps could be pushed higher but ja power consumption def goes up.

I would be curious if one was to isolate the PSU ambient temp from the machine ambient temp (PSU colder than machine intake), with bitmain psu at least we see increased power usage with higher PSU temp more than machine temp.



Moderator's note: This post was edited by frodocooper to remove a nested quote.


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 25, 2018, 03:31:34 PM
I would be curious if one was to isolate the PSU ambient temp from the machine ambient temp (PSU colder than machine intake), with bitmain psu at least we see increased power usage with higher PSU temp more than machine temp.

I have seen  bitmain psu's  drop off efficiency   when they get warm.

When I test  this avalon

 I will use a

 delta 2400 watt
 corsair 1500 titanium
 myrig 1600
 bitmain apw
 I think an avalon not sure it they are sending one
 a hp 2450 gold



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


Title: Re: My review of Avalon 841 No Info yet.
Post by: Blokforge on April 25, 2018, 04:39:36 PM
I have seen  bitmain psu's  drop off efficiency   when they get warm.

When I test  this avalon

 I will use a

 delta 2400 watt
 corsair 1500 titanium
 myrig 1600
 bitmain apw
 I think an avalon not sure it they are sending one
 a hp 2450 gold

if they dont send a sorcerer let me know, ill get you one.



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


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 25, 2018, 05:09:07 PM
if they dont send a sorcerer let me know, ill get you one.

So it showed up today.

1 841
1 rasp pi
4 auc dongles
4 usb mini wires
1 five pin

no power supply for the rasp pi
no power supply for the 841

So I pull some power supplies to do testing

and  the rasp pi won't boot  gets warm but no lites so it is either a dead brick - tested that brick is fine

I need to test if the card is dead. or the rasp pi is dead.

I have a card reader I will be looking at the card first.

So a link to what the card looks like

https://i.imgur.com/Td1mirj.png (https://i.imgur.com/Td1mirj.png)

I am linking this post to the troubleshooting for avalons
https://bitcointalk.org/index.php?topic=3224256.msg35670109#msg35670109



Moderator's note: This post was edited by frodocooper to reduce the size of the embedded image.


Title: Re: My review of Avalon 841 No Info yet.
Post by: ogombii on April 27, 2018, 06:01:41 PM


Avalon might use more power over 30C, specs pertain to 30C usage.

Still best machine on the market.

These two have been running fine at this temp.


https://i.imgur.com/9BaP31a.jpg



my temps in a 25c room

https://imgur.com/wYUDgD8


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 27, 2018, 06:13:19 PM
Well I tested the rasp pi 4 ways it is dead.  so I am waiting on amazon to send a replacement one.


Title: Re: My review of Avalon 841 No Info yet.
Post by: Thetaj on April 27, 2018, 06:34:28 PM
Well I tested the rasp pi 4 ways it is dead.  so I am waiting on amazon to send a replacement one.

I'm glad to know I'm not the only one to get a dead pi from Canaan. I got 6 from them (Don't judge me, I wanted the case)
1 DOA, 1 had a bad mem-card

Happy Testing Phil!


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 27, 2018, 08:49:24 PM
Well I tested the rasp pi 4 ways it is dead.  so I am waiting on amazon to send a replacement one.

I'm glad to know I'm not the only one to get a dead pi from Canaan. I got 6 from them (Don't judge me, I wanted the case)
1 DOA, 1 had a bad mem-card

Happy Testing Phil!

Serves me right to not have a second one on hand.  Still waiting for it.  My UPS guy comes from 2 to 6pm on paper  but in reality mostly from 5 to 6:30.

This does show why parts and service are really important.
MY 'free' sample came with
1 Avalon 841
1 rasp pi in a case with a micro sd card
4 usb cables
4 dongles
1 5 pin cable

A rasp pi for me is a 1 day wait from amazon  as no local store carries it.
So to anyone that wants to get the avalon  especially 4 or more  have 2 rasp pi's makes lots of sense.
While I type I will post the unboxing I did yesterday.

it will be on you tube soon.

Your video will be live at: https://youtu.be/lyHSeEOYHr0



I want to make note

a rasp pi 3 can be found on amazon
a power brick  for the rasp pi on amazon
usb cables on amazon
even the 5 pin cable is available on amazon

the usb to uart dongle is  an avalon part.  they sent four to me which means I may be able to help out with that.



Title: Re: My review of Avalon 841 No Info yet.
Post by: fanatic26 on April 27, 2018, 10:27:57 PM

I'm glad to know I'm not the only one to get a dead pi from Canaan. I got 6 from them (Don't judge me, I wanted the case)
1 DOA, 1 had a bad mem-card

If its the same case the the 741 it will overheat the RPi in a warm environment so be cognizant of that.

I got 54 RPis with my last 1000 order from Canaan and I had 3 bad ones out of that batch.


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 28, 2018, 12:05:16 AM
  New rasp pi has arrived

It works the sd cards were good.

the oem pi was a dud.  I did a video

showing the dead on and the good one.

I have this running on -2 offset using a  delta 2400 watt plat and I am getting very high power use

1523 watts at 13229 gh

No image just a link to a screen shot

 https://i.imgur.com/TRgGOeH.png


Title: Re: My review of Avalon 841 No Info yet.
Post by: HagssFIN on April 28, 2018, 12:57:19 AM
Nice to see some testing.  :)

15 mins is quite a short test period.

It looks like that your hash rate should most likely stabilize averaging more than the 13.2 number.

I'm surprised about the 1.5kW power consumption, since my highest measured number was 1400W (voltage offset 0, and hash rate 13.52Th/s).


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 28, 2018, 03:21:36 AM
Nice to see some testing.  :)

15 mins is quite a short test period.

It looks like that your hash rate should most likely stabilize averaging more than the 13.2 number.

I'm surprised about the 1.5kW power consumption, since my highest measured number was 1400W (voltage offset 0, and hash rate 13.52Th/s).

room was warm  seems there is a sensitivity to heat.

I will play with it some more tonight

I am in my den and will open sliding door to get temps lower then 82f

I opened my sliding door room temps dropped to 79f

the intake on the miner reads  27c/72c

it was 31c/77c

https://i.imgur.com/Hhk6J8c.png


watts on this meter dropped to 1474  they were 1509  so the temp drop dropped watts this test is -1 offset.  using delta 2400 watt plat psu

so room temp of 77  with unit temp of 26/71 hash of 13431 watts at 1470  17 minute    -1 offset  
"   "          "        74  with unit temp of 26/71  hash of 13490 watts at  1470 21 minutes -1  offset

30 minutes into the -1 offset and   I closed sliding door.

unit temps are now going to rise

30/77  hash of 13545     watts at 1520   30 minute mark.


going to test at 0 offset


Title: Re: My review of Avalon 841 No Info yet.
Post by: Thetaj on April 28, 2018, 04:51:44 AM
Wow, that power consumption is quite high phil!


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 28, 2018, 01:04:25 PM
Wow, that power consumption is quite high phil!

Maybe a poor unit.

I opened my garage  door today  as it is 53f

So my garage dropped 10 f

from  82 f  to 72 f

power dropped to

1469 watts

13703.49  hash

Temperature©

25 / 70

so temp drop lower  power by a lot of watts on  -2 -1 0 off set

https://i.imgur.com/aI3K3ka.png (https://i.imgur.com/aI3K3ka.png)



Moderator's note: This post was edited by frodocooper to reduce the size of the embedded image.


Title: Re: My review of Avalon 841 No Info yet.
Post by: TheYankeesWin! on April 28, 2018, 01:06:08 PM
So when you are at

30/77  power is 100 extra watts


vs

25/70

correct?


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 28, 2018, 01:10:51 PM
@ yankees  yes   so far it is doing that.


 I will  test with multiple  meters and psu's


but 1469/13700 = 0.107  watts a gh in a fairly cool room  under 80f

this is  a disappointing result, but I will keep testing

I may need to upgrade firmware etc.

I want to figure how cold do I need to get  best watts per gh.


Title: Re: My review of Avalon 841 No Info yet.
Post by: akadamson on April 28, 2018, 03:06:12 PM
  New rasp pi has arrived

It works the sd cards were good.

the oem pi was a dud.  I did a video

showing the dead on and the good one.

I have this running on -2 offset using a  delta 2400 watt plat and I am getting very high power use

1523 watts at 13229 gh

No image just a link to a screen shot

 https://i.imgur.com/TRgGOeH.png

did you see my comment, you can't just set the -2 in the web UI, that doesn't change the undervolt, you have to include the command line option in the more options line on the web UI.


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 28, 2018, 03:43:54 PM
did you see my comment, you can't just set the -2 in the web UI, that doesn't change the undervolt, you have to include the command line option in the more options line on the web UI.

thanks  I will go back and do this

please  see if this looks good

https://i.imgur.com/r0gUR2X.png (https://i.imgur.com/r0gUR2X.png)



Moderator's note: This post was edited by frodocooper to reduce the size of the embedded image.


Title: Re: My review of Avalon 841 No Info yet.
Post by: HagssFIN on April 28, 2018, 04:02:29 PM
Yep that is correct.

The cgminer command in the 'More Options' field is very important, since the voltage offset function doesn't work without doing so, for some reason.


Title: Re: My review of Avalon 841 No Info yet.
Post by: philipma1957 on April 28, 2018, 04:48:35 PM
@Haggs

I set it and I am running at -1  edit all tests below are at -2 offset.

I will post some results in an hour.


I finally got it setup in a way I am happy with for quality tests.



https://www.youtube.com/watch?v=sUaAQbRwd2Y

https://youtu.be/GZh6DSbYK5s

https://youtu.be/imdGUpVlre8

______________________________________________________________________________


cool room tests 67f   gave me

1366 watts and 13603 hash on -2 off set  or 0.1000419 watts a gh

https://i.imgur.com/E3a0cAJ.png (https://i.imgur.com/E3a0cAJ.png)
https://youtu.be/1UU_6Zldsww

_______________________________________________________________________________ __

warmer room test 76f gave me

1425 watts and 13603 hash on -2 offset or 0.104756 watts a gh

https://i.imgur.com/UC5GfFD.png (https://i.imgur.com/UC5GfFD.png)

https://youtu.be/9C1pMljvtwE

___________________________________________________________________
next test I will try to get to  86f or 30c  this is the max room temp allowed for




so a 67f room get really close to spec in terms of watts per gh
a 76f room is 4% over spec in terms of watts per gh

in both cases on -2 setting   hash  rate is 4.5 % over spec

2 year warranty is nice real nice.



Title: Re: My review of Avalon 841 .
Post by: TheYankeesWin! on April 29, 2018, 03:32:28 PM
So

 67f = 1366 watts
 76f = 1425 watts
 86f =  yet to test.

Phil  your solar array is fan cooled  and you put in some heat shielding but if I recall  you run  2 to 4 degrees cooler then air temps.

So if you  are 90f outside temp the array is 87f
That would mean you should not run the Avalon 841  once you get to 90f .


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on April 29, 2018, 03:44:48 PM
@ yankees

well  a 60 watt power increase  when I went from 67f to 76f translates to  60 x 24 = 1440  or 1.44 kwatts at 10 cents  that is 14.4 cents a day  extra.

Here in NJ  May 1 to Oct 1 would mean 5 months  where temps will boost power  so 150 x 14.4 cents = $21.60 extra to operate it at the array

So the power boost   means it is  not unacceptable  since the other 7 months  it will drop.

I can make the gear work  at my array with buysolar.  Mostly we have  an excess of paid for gear.

The 2 year warranty has a lot of value.  and  I figure  5 warmer months = only 21.60 per machine.

I will need to test at 86f  so I  have turned on more gear in My garage to get an idea  of what the machine uses at 86f





If I test beyond 86f  it is as a service to community but for anyone running the gear in a 87f room or 31c room  it would be running gear  in a room too hot.





https://i.imgur.com/ztkRMlm.png






2663
root
cgminer --lowmem --avalon8-fan 60-100 --avalon8-voltage-level-offset 0 -o stratum+tcp://pool.ckpool.org:333 -O 16yLHLoeyuCLPMXkVpC3gyrRYvwRGwjKJr.100:x -o stratum+tcp://mmpool.org:3333 -O philipma1957.A:1234 -o stratum+tcp://us1.bitminter.com:3333 -O philipma1957_west2:x --api-allow W:127.0.0.1 --api-listen --avalon8-voltage-level-offset -2 --real-quiet
0%
0%



the above is from the processes tab  and it shows  I have -2 offset working


Title: Re: My review of Avalon 841 .
Post by: HagssFIN on April 29, 2018, 04:06:15 PM
That's some nice additional information for everyone, thanks Phil.
I only had one environment in which I made all the tests for the AvalonMiner.

It seems that the power consumption number is much related to the ambient temperature value.


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on April 29, 2018, 05:10:52 PM
That's some nice additional information for everyone, thanks Phil.
I only had one environment in which I made all the tests for the AvalonMiner.

It seems that the power consumption number is much related to the ambient temperature value.

which  is a twofold issue

A) a few more dollars to run at 76f vs 67f

B) a cap  of how hot  is safe?

So I will  next try an 86 f  test  which should  be max safe power cap


67f = 1366 watts
76f = 1425 watts
86f =    ?    watts





Once I get  a 86f test in.

I will attempt  to go to 90- 91 f    which is over the recommended 86f

I have ability  to adjust and I have  some areas where I can run under 86f  at all times.

If you do not have that ability  at best you spend more power per unit
At worst  you may kill unit.


Title: Re: My review of Avalon 841 .
Post by: Thetaj on April 29, 2018, 06:34:02 PM
Holy moly, these are some nice new info!


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on April 29, 2018, 07:33:18 PM
now I got the room hotter on purpose


temps are

35/81

on gui

hash is 13583


watts up to 1484

room temp is 81f near intake


https://i.imgur.com/7TNfHJK.png

1484/13583 = 0.10935 watts a gh

so

67f = 1366 watts
76f = 1425 watts
81f = 1483  watts -----------  https://i.imgur.com/7TNfHJK.png
84f = 1505  watts -----------  https://i.imgur.com/dMOnY6C.png
85f=  1517
87f=  1545  watts
now  this means in my case  5 months of warmer weather  117 watts x 24 hours = 2.8 kwatts a day or 28 cents  x 150 = 42 dollars extra power  if my mining room runs at 81f

still not up to 86f  but  watts go upwards as temps go upwards not sure  why  as fans are maxed at 100%  and got to 100% when room was at 76f

139 watts extra   67 f to 84 f
179 watts extra  67f to 87f

check out this last youtube  see how quickly watt use drops once I cool off room 


your video will be live at:




https://youtu.be/KEctJaz4Mo0


 Max room temp  for this miner is 86f.

latest video room was 87f

watts use does a big time drop with temp drops.


Title: Re: My review of Avalon 841 .
Post by: taserz on April 30, 2018, 07:49:06 AM
I would not run it in the mid 90s. Your solar array that has the air at 95F should not be running any current asic miner at full speed up there it is to hot. You will damage the asic running it in that temp for a few days. It might not happen right away but it will severely change the longevity of the device. (take it from someone that run a bunch in the mid 90s for science) 85F or lower is what you want.



Moderator's note: This post was edited by frodocooper to remove an unnecessary quote.


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on April 30, 2018, 12:42:37 PM
is that worth buying it?

Well it is a good question.  It would be an issue  if you can not cool the gear.  even  the max temp allowed to run the gear 30c or 86f

https://canaan.io/wp-content/uploads/2018/03/841-datasheet-1.pdf


https://i.imgur.com/39pPn0b.png (https://i.imgur.com/39pPn0b.png)


resulted  in  1545 watts used vs 1366  at 67f

So  87f = 1545 watts
and 67f = 1366 watts

This means I can not put 20 in my solar array  which will go well into the 90's in the summer.

But even if you run  at 85f  you are eating  150 to 180 extra watts.

If I get 10 or 20 of these I need my buyers to know the heat limits.

To be fair the spec page shows 30c as the max  it also shows a +- 20 %  range which we know know is dependent on heat in your mining room.

Part of my job it to try to show what you would be getting into if I sold gear to you or if you buy from a builder.

@ taserz   the only gear  I can run safely in the array in the summer :

 the old  s-9 set to lower freq
the L3+   set to lower freq
the dragonmint T1  set to efficiency and with -ck's throttling  feature when gear gets hot.

the last youtube I did  stunned  me  I dropped the room temp from  87f to 76f by opening my garage doors  and watts dropped from 1545 to 1425 in well under 8 minutes as the room cooled.


Today it is 48 f.  I am going to test this again. Using a 2450 watt hp psu.


Title: Re: My review of Avalon 841 .
Post by: TheYankeesWin! on April 30, 2018, 01:46:32 PM
So I read the spec sheet  and it say the gear can be as cold as 0c

You ran as cold as 67f which is 19.4 c

You did 0.1004  or 1366 watts and 13603 gh.

So then this gear would be a beast in a cold room.

Your array  is a loft in a converted barn  with rain and heat shielding.

It would be great for the 841 starting in Oct and up to Apr.


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on April 30, 2018, 01:51:49 PM
So I read the spec sheet  and it say the gear can be as cold as 0c

You ran as cold as 67f which is 19.4 c

You did 0.1004  or 1366 watts and 13603 gh.

So then this gear would be a beast in a cold room.

Your array  is a loft in a converted barn  with rain and heat shielding.

It would be great for the 841 starting in Oct and up to Apr.

yes it would be really good for 6 to 7 months a year.

Actually  my opinion is  a firmware tweak  that allows a true  freq downclock  for hot mining  fixes this gear.

It really needs an option  like that

I am letting it   get hot again


Temperature©----------Fan
36 / 82_____________5550RPM / 100%

and the room is up to 82f   

 I want to   do this test again and see what result. I get with the hp 2450 watt psu I have.


Title: Re: My review of Avalon 841 .
Post by: Steamtyme on April 30, 2018, 03:55:45 PM
My biggest concern would really come down to how the Warranty would be affected by running these miners above the stated 30C.

If the numbers at 30C as printed are only for the benefit of showcasing the optimal performance temperature ranges, then I would have no problem with the Miner. My electrical costs could support the increased usage at the higher temperature ranges. I only get maybe 1 day a year above 40C.

I understand though the concerns for others with Margins being slimmer and overall temperatures being warmer longer.

Good job with all the testing, very informative.


*snipped*
resulted  in  1545 watts used vs 1366  at 67f

So  87f = 1545 watts
and 67f = 1366 watts

This means I can not put 20 in my solar array  which will go well into the 90's in the summer.

But even if you run  at 85f  you are eating  150 to 180 extra watts.


To be fair the spec page shows 30c as the max  it also shows a +- 20 %  range which we know know is dependent on heat in your mining room.



Title: Re: My review of Avalon 841 .
Post by: philipma1957 on April 30, 2018, 04:12:35 PM
My biggest concern would really come down to how the Warranty would be affected by running these miners above the stated 30C.

If the numbers at 30C as printed are only for the benefit of showcasing the optimal performance temperature ranges, then I would have no problem with the Miner. My electrical costs could support the increased usage at the higher temperature ranges. I only get maybe 1 day a year above 40C.

I understand though the concerns for others with Margins being slimmer and overall temperatures being warmer longer.

Good job with all the testing, very informative.

Well these are a no go in the solar array loft

solar array with  heat shield
https://i.imgur.com/04JHz00.jpg
https://i.imgur.com/dZLTmCj.jpg
https://i.imgur.com/5em72rF.jpg

a more updated video

https://www.youtube.com/watch?v=HKlXarvBv5M

I run 3 to 4 f lower then outside temps during the summer.

so  when it gets to 90 or 91f  I would be over the 86f or 30 c recommended.

Even at 82 or 83 f intake air  power use is up more then 110 watts then 67f or 19.4c

Of course when fall comes and temps are under 70f all the time this gear would really be efficient.

I suspect if I could run it in a 50f or 10c room  which I could do for fall and winter  I could get as low as 0.095 watts a gh maybe less.



Moderator's note: This post was edited by frodocooper to remove a nested quote.


Title: Re: My review of Avalon 841 .
Post by: Megaquake on April 30, 2018, 04:37:38 PM
This setting --avalon8-voltage-level-offset has no effect on mining speed so I set --avalon8-voltage-level +3 with results and it loos like +5 is the default setting.

around a 1000GHs drop and a slight temperature drop.

13204.45
30/70

13447.80
29/74

13630.70
29/74

GHSav
39591.71


Title: Re: My review of Avalon 841 .
Post by: akadamson on April 30, 2018, 06:39:37 PM
This setting --avalon8-voltage-level-offset has no effect on mining speed so I set --avalon8-voltage-level +3 with results and it loos like +5 is the default setting.

around a 1000GHs drop and a slight temperature drop.

13204.45
30/70

13447.80
29/74

13630.70
29/74

GHSav
39591.71

I'm not sure you are seeing what you think you are... the value range that the controller works with is -2 to +1, a +3 or +5 will return an error and either default to 0 or not start.



Title: Re: My review of Avalon 841 .
Post by: akadamson on April 30, 2018, 06:46:12 PM
I think there is a flaw here in what numbers are being thrown around.

you will notice that a 30C inlet temperature is *NOT* a 30C room temp.  In fact, my room is 75f and my inlet temps are 30-31C.... Also my outlet temps are 75-77C (on a -1 undervolt).

The inlet temp really has nothing to do with what room temp you should or shouldn't run a miner in, the OUTLET temp has *everything* to do with it.

The only reason Canaan provides an inlet temp is because - of course there is a relationship of inlet to outlet.  But I suspect if you can keep the outlet to less than 80C, you don't care what the inlet temp is.

I just went and looked at the code again, the shutdown temp is 105C (outlet) the fan moderation temp is 70C (but that will only do anything in a cold room and if you changed the max fan speed from the 100% that all 8 series come shipped with.)



Moderator's note: This post was edited by frodocooper to remove an unnecessary quote.


Title: Re: My review of Avalon 841 .
Post by: Megaquake on April 30, 2018, 08:07:07 PM
This setting --avalon8-voltage-level-offset has no effect on mining speed so I set --avalon8-voltage-level +3 with results and it loos like +5 is the default setting.
I'm not sure you are seeing what you think you are... the value range that the controller works with is -2 to +1, a +3 or +5 will return an error and either default to 0 or not start.

With a setting of --avalon8-voltage-level +6 and it does work, I set it back to +2 after that screenshot so it will run cool, so the setting absolutly does work

https://i.imgur.com/YGFJj2q.png (https://i.imgur.com/YGFJj2q.png)

https://i.imgur.com/CmiqGr0.png (https://i.imgur.com/CmiqGr0.png)



Moderator's note: This post was edited by frodocooper to reduce the size of the embedded images.


Title: Re: My review of Avalon 841 .
Post by: akadamson on April 30, 2018, 08:25:43 PM
With a setting of --avalon8-voltage-level +6 and it does work, I set it back to +2 after that screenshot so it will run cool, so the setting absolutly does work

[...]

WHOA, stop the presses, you are playing with the *wrong* setting.  The actual setting should be --avalon8-voltage-level-offset -1, not -avalon8-voltage-level.  The later has a range of -10 to +10, but it is NOT the undervoltage setting.  The undervolt setting has a range of -2 to +1 and as you see in the code below setting *it* to anything more than +1 does nothing.

And you *have* to put the undervolt setting in the more options line, even though it's in the UI, the setting in the UI does nothing as you have determined, it always defaults to 0.  But if you put it in the more options line, it will work.

Here is the code for the undervolt.

Code:
char *set_avalon8_voltage_level_offset(char *arg)
{
       int val, ret;

       ret = sscanf(arg, "%d", &val);
       if (ret < 1)
               return "No value passed to avalon8-voltage-level-offset";

       if (val < AVA8_DEFAULT_VOLTAGE_LEVEL_OFFSET_MIN || val > AVA8_DEFAULT_VOLTAGE_LEVEL_OFFSET_MAX)
               return "Invalid value passed to avalon8-voltage-level-offset";

       opt_avalon8_voltage_level_offset = val;

       return NULL;
}

And here are the defines

Code:
#define AVA8_DEFAULT_VOLTAGE_LEVEL_OFFSET_MIN	-2
#define AVA8_DEFAULT_VOLTAGE_LEVEL_OFFSET 0
#define AVA8_DEFAULT_VOLTAGE_LEVEL_OFFSET_MAX 1

If it's set higher that +1, it just throws an error and defaults to 0.

But I'd be very careful playing with the setting you are playing with, I have no idea what it does.



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


Title: Re: My review of Avalon 841 .
Post by: Megaquake on April 30, 2018, 09:06:29 PM
I would like to add that my power usage at the wall for one miner was 1230-1260 watts @ 13181.97GHS 240.2 volts with the setting --avalon8-voltage-level +2 and --avalon8-voltage-level-offset 0 with temperature at 32/76c


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on April 30, 2018, 09:35:45 PM
okay right now I am doing
 1545 watts
13635 hash

room temp is 86/87
__________________________________
temp c
40/89

 https://i.imgur.com/PMTTmto.png

@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@

Voltage Offset(Default: 0)

Minimum Fan%(Range: 0-100, Default: 10%)

API Allow(Default: W:127.0.0.1)

More Options

https://i.imgur.com/F7CajMS.png

#################################
#################################

so at the room temp of 86/87  my power use is  terrible it is 1545 watts

If I open all doors  to the outside dropping my room temps  those watts  drop  fast real fast  and hash stays the same.

But this won't work in the summer.  if it is 95f.  today it works as it is 55f.


So I am going to set

--avalon8-voltage-level +1

not --avalon8-voltage-level-offset -2

my reasoning is  that currently 13640 hash at 1545 watts in an 86/87f room is not going to be worth doing.



edit

megaquake's setting does work for me

I get 12968  and watts are 1492  in a warm room of 86/87f


bigger edit


  --avalon8-voltage-level -1

works!!!

oh the machine has turned in to a goddess of under clock yeah baby!

numbers are fucking great.

Going to do a you tube.

megaquake is a fucking genius.  pointed me in the correct direction.


Sent him some merit points.

pretty sure  this setting will protect miner from a hot space during the summer.

So if you air cool  your gear this miner would need the under clock during hot spells

latest you tube   got good results megaquake  is correct his setting works

look how low it is .

https://www.youtube.com/watch?v=fvWXJTYrW9o

this should prevent summertime over heating for air cooled farms.

room temp of 67-70f     11900 hash 1178 watts
room temp of 81-82f     12141 hash 1308 watts
room temp of 83-84f     12295 hash 1326 watts  Temperature© 35 / 78   these are safe numbers

room temp of 86f           12591 hash 1348watts Temperature© 37/80    still safe  note the watts per gh are 0.107 spec is 0.099  but 86f is max room temp recommended  I believe with this lower setting you can do more then 86f  this setup is 197 watts less power and hash dropped a about 1000gh.  getting that 1000h and spending 200 watts is not what I would do.




this is  from the process tab look for the info below

4249
root
cgminer --lowmem --avalon8-fan 60-100 --avalon8-voltage-level-offset 0 -o stratum+tcp://pool.ckpool.org:333 -O 16yLHLoeyuCLPMXkVpC3gyrRYvwRGwjKJr.100:x -o stratum+tcp://mmpool.org:3333 -O philipma1957.A:1234 -o stratum+tcp://us1.bitminter.com:3333 -O philipma1957_west2:x --api-allow W:127.0.0.1 --api-listen --avalon8-voltage-level -1 --real-quiet
0%
0%



 
I tested the three below


--avalon8-voltage-level -1   works really well for me.

 --avalon8-voltage-level +1 did not start
 --avalon8-voltage-level +2 works

the key is to get a low one for hot temp days.

I will try

--avalon8-voltage-level -2  just because I think it would bullet proof miner on hottest days we have in NJ


Title: Re: My review of Avalon 841 .
Post by: TheYankeesWin! on May 01, 2018, 12:12:30 AM
   So Phil  as you can guess I live in New York, Duchess county.
I am  Blessed with cooler weather from Oct 1 to May 1. I have a garage with 2 exhaust fans so I should be able to stock up on a few of these  run them lower until Oct 1 then crank them up correct?


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 01, 2018, 12:16:18 AM
  So Phil  as you can guess I live in New York, Duchess county.
I am  Blessed with cooler weather from Oct 1 to May 1. I have a garage with 2 exhaust fans so I should be able to stock up on a few of these  run them lower until Oct 1 then crank them up correct?

Exactly so.

As  they will do 12600  for the summer  at 1350 watts. On the lower clock megaquake and I figured out
Then do  13600 for the fall and winter at 1325 watts on the stock clock.

If you are In Florida and like the Miami Marlins they may not be the best choice unless  you are going to use some ac.



It will be warmer tomorrow  I  will push the unit  past the 90f point  to see how high watts go.


--avalon8-voltage-level +2   good helps megaquake's suggestion

--avalon8-voltage-level -1    great helps more  I tested it

--avalon8-voltage-level -2   not tested even better


Title: Re: My review of Avalon 841 .
Post by: DPoS2 on May 01, 2018, 02:01:26 AM
Phil,  great work and vids but you can really make use of the north east cool weather by pointing the intakes to an open window with a small fan (computer case fan) between the intake and the screen of the window for each miner.  The fans will bring in cool air and really run these at low temps.  The miner fans will run 50% or lower (I keep the fans to 50% min just in case)

Soon I will flip the miners around and just blow the hot air out the windows and use your voltage underclocks if need be

Would be great to heat the pool with these



Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 01, 2018, 03:27:52 AM
Phil,  great work and vids but you can really make use of the north east cool weather by pointing the intakes to an open window with a small fan (computer case fan) between the intake and the screen of the window for each miner.  The fans will bring in cool air and really run these at low temps.  The miner fans will run 50% or lower (I keep the fans to 50% min just in case)

Soon I will flip the miners around and just blow the hot air out the windows and use your voltage underclocks if need be

Would be great to heat the pool with these



I know lots of ways to cool off the miner when temps are cool.

But if I am to service and help it with breakdowns I need  to push test it.

I got the garage up to 94f using the

--avalon8-voltage-level -1  in the more options slot.

watts were 1406
hash was   12800   this means miner would be okay in my solar array even on a 97f temp summer day.



I am now testing  one setting lower in the same 94f garage note 94f is 8f higher then recommended


--avalon8-voltage-level -2


a few minutes in  

watts  1322
hash   12413

this is 0.1065  watts a gh in 94f  and 86f is max suggested.

It will me warm in NJ  78 tomorrow .  I hope to see  if I can get the room to 96f

https://i.imgur.com/omaVuEc.png
https://i.imgur.com/CnGjc4h.png
https://i.imgur.com/KEYmisF.png


the above links show the lower setting which  is keeping watts at 1322 hash at 12413 in a 94 f room.

SOME TIME tomorrow I will get it over 96f and it will run under 1350 watts I hope.
which is pretty good.

people should thank megaquake for finding the path to try tests on if not for him I would have stayed on a path that did not help out.


Title: Re: My review of Avalon 841 .
Post by: DPoS2 on May 01, 2018, 03:31:46 AM
How much power are you going to get out of your solar setup?  Will it be enough to run one miner at least?

I didn't think the math made any sense for the northeast to bother with solar with costs associated to it (either leasing or buying)



Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 01, 2018, 03:43:49 AM
How much power are you going to get out of your solar setup?  Will it be enough to run one miner at least?

I didn't think the math made any sense for the northeast to bother with solar with costs associated to it (either leasing or buying)




Solar array thread

https://bitcointalk.org/index.php?topic=1369207.0


we can run 72 amps at 240 volts

the array is almost paid for itself.

New Jersey Is a great state for Solar energy

The array has 20 years left on its warranties.

my partner buysolar owns a solar install business




Title: Re: My review of Avalon 841 .
Post by: Thetaj on May 01, 2018, 04:29:55 AM
I envy you guys in the US for the cool temps. I'm stuck with 30C all year :(


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 01, 2018, 04:34:10 AM
I envy you guys in the US for the cool temps. I'm stuck with 30C all year :(

Then the T1 May be better. For you.

I am pretty sure I can make the Avalon 841 work for many places in the USA .

But not so sure it works so well for a guy like you other then ac cool it.

over night

https://i.imgur.com/8zGsa2S.png


Temperature©
39 / 81

GHSav
12569.43

Watts
1317

Room Temp
90F

from processes tab:

4946
root
cgminer --lowmem --avalon8-fan 60-100 --avalon8-voltage-level-offset 0 -o stratum+tcp://pool.ckpool.org:333 -O 16yLHLoeyuCLPMXkVpC3gyrRYvwRGwjKJr.100:x -o stratum+tcp://mmpool.org:3333 -O philipma1957.A:1234 -o stratum+tcp://us1.bitminter.com:3333 -O philipma1957_west2:x --api-allow W:127.0.0.1 --api-listen --avalon8-voltage-level -2 --real-quiet


So    overnight testing results are good.  I am going to raise room temp  to 96f if possible today

at 90f  which is 4f higher then 86f  max listed  

I get okay numbers with the under clock.

note 1317 watts means 5268 watts on a 30 amp pdu  and 30 amp pdus rate 24 amps x 230 volts = 5520 watts.

so this clocking allows  you to run in  a 90f room 4 units to a pdu.

I cranked room temps up more to  96f


https://i.imgur.com/lJYqdHh.png
https://i.imgur.com/Rcfixe0.png

Numbers show raising  power to 1368 hash was 12592

but frankly  running at 96/97 f is running in a very hot space.  10-11f over spec number

and with under clock

13000 hash spec is 12592

1280  watt spec  is 1368






5459
root
cgminer --lowmem --avalon8-fan 60-100 --avalon8-voltage-level-offset 0 -o stratum+tcp://pool.ckpool.org:333 -O 16yLHLoeyuCLPMXkVpC3gyrRYvwRGwjKJr.100:x -o stratum+tcp://mmpool.org:3333 -O philipma1957.A:1234 -o stratum+tcp://us1.bitminter.com:3333 -O philipma1957_west2:x --api-allow W:127.0.0.1 --api-listen --avalon8-voltage-level -2 --real-quiet
1%
0%






I can't fault the gear  as long as you can do this clock


I am going to keep pushing  gear  and try  to drop more clock in  a 97f room


 --avalon8-voltage-level -3  

 this is the new test  and should give more protection  against heat


--avalon8-voltage-level +2 -------- megaquake's does help some what
--avalon8-voltage-level -1  --------  works better
--avalon8-voltage-level -2  --------- works better

--avalon8-voltage-level -3  ---------- testing in a 97f room works  

hash dropped to   11651  now 12004
watts at 1308
Temperature©
42 / 84

room is 97-98f or 36c

my thoughts are this  

The gear can run in a hot room if you down clock it

97f 98f is really hot  and if you don't down clock this gear  it will suck up a lot lot more power and may overheat.

but the lower clocks drop watts a lot.


12004 gh 1308 watts at 97-98 f

--avalon8-voltage-level -3  ---------- testing in a 97f room works  





13600 gh 1545 watts at 91f  

--avalon8-voltage-level-offset -2 ------- tested results were really bad





I will run for 1 more hour at these 97-98f temps

Temperature©
43 / 84                    Note the 43 reflects a really hot room but the 84 © is okay

GHSav
12270.74

Watts
1308

So I think  I don't need to check  beyond

--avalon8-voltage-level -3  

I will do this up to 2 hours at 97f.
I will then drop temps  to see what I can lower watt use to.  
I will move it to the solar array in a day or 2.

Final youtube done in a 100f room for 2 hours

Your video will be live at: https://youtu.be/xIe4dDiqnkQ

this under clock test allows me to say I would tell people the miner is good to use.  if you under clock it in a really hot spot.

12500gh
1326 watts   in a 100f room is really good on the under clock


Title: Re: My review of Avalon 841 .
Post by: Megaquake on May 01, 2018, 05:40:19 PM
Small update: still running --avalon8-voltage-level +2 with the Delta 2400 PSU 13367.97GHs 34/78c 1320 watts


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 01, 2018, 05:43:08 PM
Small update: still running --avalon8-voltage-level +2 with the Delta 2400 PSU 13367.97GHs 34/78c 1320 watts

Nice


If you can try any of the ones below please do.

--avalon8-voltage-level -1
--avalon8-voltage-level -2
--avalon8-voltage-level -3




Title: Re: My review of Avalon 841 .
Post by: Megaquake on May 01, 2018, 06:01:57 PM
Small update: still running --avalon8-voltage-level +2 with the Delta 2400 PSU 13367.97GHs 34/78c 1320 watts

Nice


If you can try any of the ones below please do.

--avalon8-voltage-level -1
--avalon8-voltage-level -2
--avalon8-voltage-level -3



--avalon8-voltage-level -3 = 10751.58GHs 32/66c 980 watts
--avalon8-voltage-level -2 = 11680.80GHs 33/67c 1071 watts
--avalon8-voltage-level -1 = 11878.42GHs 33/71C 1123 watts

Run approximately 5 minutes between settings


Title: Re: My review of Avalon 841 .
Post by: HagssFIN on May 01, 2018, 06:18:45 PM
Wow. The 'under 1kW' result is quite amazing,
thank you very much sharing your method and results.  :)


Title: Re: My review of Avalon 841 .
Post by: Megaquake on May 01, 2018, 07:01:23 PM
--avalon8-voltage-level -3 = 11256.88GHs 33/67c 1008 watts hotter room temp and increased draw?
--avalon8-voltage-level -2 = 11436.67GHs 33/67c 1056 watts
--avalon8-voltage-level -1 = 11674.60GHs 33/69C 1105 watts

20 minutes between settings and checking watts using the delta 2400 PSU.

I am going to check the draw next using the HP 2450 PSU , this model

https://www.ebay.com/itm/2450W-Power-Supply-for-bitmain-antminer-T9-S9-L3-S7-200V-240V-PSU-US-SALE/253472915149?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D44039%26meid%3De626ae80772d42b0865fa08074b41a74%26pid%3D100005%26rk%3D6%26rkt%3D6%26sd%3D263280077803%26itm%3D253472915149&_trksid=p2047675.c100005.m1851

Also note that I am using the testing firmware/mmc dated 2018-Apr-21

Hey thanks for the merit Phil!


Title: Re: My review of Avalon 841 .
Post by: richdmz on May 01, 2018, 07:05:38 PM
--avalon8-voltage-level -3 = 11256.88GHs 33/67c 1008 watts hotter room temp and increased draw?
--avalon8-voltage-level -2 = 11436.67GHs 33/67c 1056 watts
--avalon8-voltage-level -1 = 11674.60GHs 33/69C 1105 watts

20 minutes between settings and checking watts using the delta 2400 PSU.

I am going to check the draw next using the HP 2450 PSU , this model

https://www.ebay.com/itm/2450W-Power-Supply-for-bitmain-antminer-T9-S9-L3-S7-200V-240V-PSU-US-SALE/253472915149?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D44039%26meid%3De626ae80772d42b0865fa08074b41a74%26pid%3D100005%26rk%3D6%26rkt%3D6%26sd%3D263280077803%26itm%3D253472915149&_trksid=p2047675.c100005.m1851

Also note that I am using the testing firmware/mmc dated 2018-Apr-21

Hey thanks for the merit Phil!

have you noticed any difference with the testing firmware? were you on the original or March firmware before?


Title: Re: My review of Avalon 841 .
Post by: Megaquake on May 01, 2018, 07:10:34 PM


have you noticed any difference with the testing firmware? were you on the original or March firmware before?

No difference in performance from the older firmware that I can tell, and note that the latest just had to do with heat management


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 01, 2018, 07:43:57 PM
I am using

MM

8411803-14b0f10


https://github.com/Canaan-Creative/avalon8-docs/wiki/AvalonMiner-841-firmware-downloads

is there any newer?

I cooled the garage down from 100f to 89f and since it is warm here in NJ at 3:37pm outdoor temp is 78f

the garage is 89f my hash on the -3 setting is

11888  gh watts are 1122

1122/11888 = 0.09438

My readings are not as good since garage is still warm, but as I run this and temps cool  reading will improve.T

Temperature ©
36/74                  36 reflects an 89f garage temp  but the 74 is very good.

So this miner  will be above spec in a cold spot and below spec in a hot spot.

Since NJ  will be 7 cooler months and 5 warmer months It will work very nicely.


Title: Re: My review of Avalon 841 .
Post by: Megaquake on May 01, 2018, 07:50:38 PM
The newest MMC here: https://canaan.io/downloads/software/avalon841/mm/nexttesting/2018-04-21/

Ras Pi firmware here: https://canaan.io/downloads/software/avalon841/openwrt/nexttesting/20180421/


Title: Re: My review of Avalon 841 .
Post by: Megaquake on May 01, 2018, 07:56:17 PM
--avalon8-voltage-level -3 = 11223.55GHs 35/67c 1086 watts
--avalon8-voltage-level -2 = 11741.25GHs 35/70c 1177 watts
--avalon8-voltage-level -1 = 12002.42GHs 35/71C 1235 watts

Note that this is using the HP 2450 and a different 841 for the 20 minute test, and it seems to run faster than the other miner on the settings.

Seems to be about the same considering that this miner runs faster and hotter

Now to break the 980 watt barrier? maybe


Title: Re: My review of Avalon 841 .
Post by: HagssFIN on May 01, 2018, 08:10:17 PM
The newest MMC here: https://canaan.io/downloads/software/avalon841/mm/nexttesting/2018-04-21/

Ras Pi firmware here: https://canaan.io/downloads/software/avalon841/openwrt/nexttesting/20180421/

I know this is obvious what I'm about to say,
but please note that these versions are still in the testing and are not declared as stable releases.


Title: Re: My review of Avalon 841 .
Post by: Megaquake on May 01, 2018, 08:15:37 PM
The newest MMC here: https://canaan.io/downloads/software/avalon841/mm/nexttesting/2018-04-21/

Ras Pi firmware here: https://canaan.io/downloads/software/avalon841/openwrt/nexttesting/20180421/

I know this is obvious what I'm about to say,
but please note that these versions are still in the testing and are not declared as stable releases.

I did know that and I have been using those for a week now with no notable bugs, and during the testing I just did my hardware rate never went above %0.0001


Title: Re: My review of Avalon 841 .
Post by: Megaquake on May 01, 2018, 08:20:44 PM
I would also like to add that I just set --avalon8-voltage-level +3 with the HP 2450 temps were 36/82c  13272.40GHs the wattage draw went up to 1488  :'(


Title: Re: My review of Avalon 841 .
Post by: akadamson on May 01, 2018, 08:25:15 PM
anyone checked hardware errors on these various voltage settings?  Add up the HW[] values in the log output.  I suspect they will be rather high on the dramatic voltage changes.  Hash rate is raw and will include all the errors

I know if I use a -2 with the normal undervolt method, that I have one miner that will generate 12.9Th, but it's also generating almost 10% errors.  If I move that to -1, it will got to 13.1Th and the error rate will drop the 2%



Title: Re: My review of Avalon 841 .
Post by: Megaquake on May 01, 2018, 08:37:27 PM
anyone checked hardware errors on these various voltage settings?  Add up the HW[] values in the log output.  I suspect they will be rather high on the dramatic voltage changes.  Hash rate is raw and will include all the errors

I know if I use a -2 with the normal undervolt method, that I have one miner that will generate 12.9Th, but it's also generating almost 10% errors.  If I move that to -1, it will got to 13.1Th and the error rate will drop the 2%



during the tests I conducted above I never saw more than 2 hw errors


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 01, 2018, 09:21:02 PM
anyone checked hardware errors on these various voltage settings?  Add up the HW[] values in the log output.  I suspect they will be rather high on the dramatic voltage changes.  Hash rate is raw and will include all the errors

I know if I use a -2 with the normal undervolt method, that I have one miner that will generate 12.9Th, but it's also generating almost 10% errors.  If I move that to -1, it will got to 13.1Th and the error rate will drop the 2%



hardly any 25 in 4 hours

tempted to set  to -4  just for shits and giggles.

Code:
[Firmware Version] => Avalon Firmware - 20180305
    luci: 62d814c
    cgminer: b5b497e
    cgminer-packages: 960e108
Reply was 'STATUS=S,When=1525208011,Code=70,Msg=CGMiner stats,Description=cgminer 4.10.0|STATS=0,ID=AV80,Elapsed=20589,Calls=0,Wait=0.000000,Max=0.000000,Min=99999999.000000,MM ID1=Ver[8411803-14b0f10]
    DNA[01354b2ef7a843ca]
    Elapsed[14475]
    MW[4709339 4709128 4709200 4709276]
    LW[18836943]
    MH[4 7 7 7]
    HW[25]
    Temp[33]
    TMax[69]
    Fan[5550]
    FanR[98%]
    Vi[1186 1186 1181 1181]
    Vo[3684 3676 3667 3659]
    GHSmm[11243.70]
    WU[156813.60]
    Freq[628.56]
    PG[15]
    Led[0]
    MW0[778 746 870 804 708 771 811 860 790 824 844 742 763 826 788 770 686 741 747 780 746 741 790 796 823 789]
    MW1[665 694 691 745 700 786 661 655 639 724 675 690 616 715 753 692 671 665 680 640 734 740 735 691 691 725]
    MW2[701 687 688 752 685 718 643 674 727 643 707 691 684 585 677 681 737 634 707 725 711 642 712 638 691 725]
    MW3[735 726 764 740 774 750 765 743 700 656 681 745 731 776 691 710 690 789 791 787 824 784 718 806 756 787]
    TA[104]
    ECHU[0 0 0 0]
    ECMM[0]
    FM[1]
    CRC[0 0 0 0],MM Count=1,Smart Speed=1,Connecter=AUC,AUC VER=AUC-20151208,AUC I2C Speed=400000,AUC I2C XDelay=19200,AUC Sensor=13451,AUC Temperature=34.81,Connection Overloaded=false,Voltage Level Offset=0,Nonce Mask=24,USB Pipe=0,USB Delay=r0 0.000000 w0 0.000000,USB tmo=0 0|STATS=1,ID=POOL0,Elapsed=20589,Calls=0,Wait=0.000000,Max=0.000000,Min=99999999.000000,Pool Calls=0,Pool Attempts=0,Pool Wait=0.000000,Pool Max=0.000000,Pool Min=99999999.000000,Pool Av=0.000000,Work Had Roll Time=false,Work Can Roll=false,Work Had Expire=false,Work Roll Time=0,Work Diff=262144.00000000,Min Diff=1.00000000,Max Diff=524288.00000000,Min Diff Count=43,Max Diff Count=30188,Times Sent=336,Bytes Sent=42196,Times Recv=1266,Bytes Recv=1022014,Net Bytes Sent=42196,Net Bytes Recv=1022014|STATS=2,ID=POOL1,Elapsed=20589,Calls=0,Wait=0.000000,Max=0.000000,Min=99999999.000000,Pool Calls=0,Pool Attempts=0,Pool Wait=0.000000,Pool Max=0.000000,Pool Min=99999999.000000,Pool Av=0.000000,Work Had Roll Time=false,Work Can Roll=false,Work Had Expire=false,Work Roll Time=0,Work Diff=0.00000000,Min Diff=0.00000000,Max Diff=0.00000000,Min Diff Count=0,Max Diff Count=0,Times Sent=2,Bytes Sent=173,Times Recv=6,Bytes Recv=22652,Net Bytes Sent=173,Net Bytes Recv=22652|STATS=3,ID=POOL2,Elapsed=20589,Calls=0,Wait=0.000000,Max=0.000000,Min=99999999.000000,Pool Calls=0,Pool Attempts=0,Pool Wait=0.000000,Pool Max=0.000000,Pool Min=99999999.000000,Pool Av=0.000000,Work Had Roll Time=false,Work Can Roll=false,Work Had Expire=false,Work Roll Time=0,Work Diff=0.00000000,Min Diff=0.00000000,Max Diff=0.00000000,Min Diff Count=0,Max Diff Count=0,Times Sent=2,Bytes Sent=150,Times Recv=5,Bytes Recv=1450,Net Bytes Sent=150,Net Bytes Recv=1450|'
[STATUS] =>
(
   [STATUS] => S
   [When] => 1525208011
   [Code] => 70
   [Msg] => CGMiner stats
   [Description] => cgminer 4.10.0
)
[STATS0] =>
(
   [STATS] => 0
   [ID] => AV80
   [Elapsed] => 20589
   [Calls] => 0
   [Wait] => 0.000000
   [Max] => 0.000000
   [Min] => 99999999.000000
   [MM ID1] => Ver[8411803-14b0f10]
    DNA[01354b2ef7a843ca]
    Elapsed[14475]
    MW[4709339 4709128 4709200 4709276]
    LW[18836943]
    MH[4 7 7 7]
    HW[25]
    Temp[33]
    TMax[69]
    Fan[5550]
    FanR[98%]
    Vi[1186 1186 1181 1181]
    Vo[3684 3676 3667 3659]
    GHSmm[11243.70]
    WU[156813.60]
    Freq[628.56]
    PG[15]
    Led[0]
    MW0[778 746 870 804 708 771 811 860 790 824 844 742 763 826 788 770 686 741 747 780 746 741 790 796 823 789]
    MW1[665 694 691 745 700 786 661 655 639 724 675 690 616 715 753 692 671 665 680 640 734 740 735 691 691 725]
    MW2[701 687 688 752 685 718 643 674 727 643 707 691 684 585 677 681 737 634 707 725 711 642 712 638 691 725]
    MW3[735 726 764 740 774 750 765 743 700 656 681 745 731 776 691 710 690 789 791 787 824 784 718 806 756 787]
    TA[104]
    ECHU[0 0 0 0]
    ECMM[0]
    FM[1]
    CRC[0 0 0 0]
   [MM Count] => 1
   [Smart Speed] => 1
   [Connecter] => AUC
   [AUC VER] => AUC-20151208
   [AUC I2C Speed] => 400000
   [AUC I2C XDelay] => 19200
   [AUC Sensor] => 13451
   [AUC Temperature] => 34.81
   [Connection Overloaded] => false
   [Voltage Level Offset] => 0
   [Nonce Mask] => 24
   [USB Pipe] => 0
   [USB Delay] => r0 0.000000 w0 0.000000
   [USB tmo] => 0 0
)
[STATS1] =>
(
   [STATS] => 1
   [ID] => POOL0
   [Elapsed] => 20589
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   [Wait] => 0.000000
   [Max] => 0.000000
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   [Pool Calls] => 0
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   [Work Diff] => 262144.00000000
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   [Max Diff Count] => 30188
   [Times Sent] => 336
   [Bytes Sent] => 42196
   [Times Recv] => 1266
   [Bytes Recv] => 1022014
   [Net Bytes Sent] => 42196
   [Net Bytes Recv] => 1022014
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   [Pool Min] => 99999999.000000
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   [Work Can Roll] => false
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   [Bytes Recv] => 22652
   [Net Bytes Sent] => 173
   [Net Bytes Recv] => 22652
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   [Pool Wait] => 0.000000
   [Pool Max] => 0.000000
   [Pool Min] => 99999999.000000
   [Pool Av] => 0.000000
   [Work Had Roll Time] => false
   [Work Can Roll] => false
   [Work Had Expire] => false
   [Work Roll Time] => 0
   [Work Diff] => 0.00000000
   [Min Diff] => 0.00000000
   [Max Diff] => 0.00000000
   [Min Diff Count] => 0
   [Max Diff Count] => 0
   [Times Sent] => 2
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   [Times Recv] => 5
   [Bytes Recv] => 1450
   [Net Bytes Sent] => 150
   [Net Bytes Recv] => 1450
)

[/code]


Title: Re: My review of Avalon 841 .
Post by: TheYankeesWin! on May 02, 2018, 11:51:10 AM
Phil did you set it to -4?


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 02, 2018, 12:06:40 PM
@ yankees I left it on -3

it was doing 1122 watts and 11400 gh in a 88f room on an overnight run.

I just set it to cgminer.default
cgminer.default.more_options=--avalon8-voltage-level -4


Title: Re: My review of Avalon 841 .
Post by: richdmz on May 02, 2018, 02:37:44 PM
Phil, did you mention you found a generic for the AUC cable on Amazon. I tried searching your posts but couldn't find it.


Title: Re: My review of Avalon 841 .
Post by: HagssFIN on May 02, 2018, 02:52:53 PM
@richdmz

I'm quoting my old post in the Avalon7 thread.

This also applies for the Avalon8 generation,
as the communication structure is the same.

anyone know where the 4-pin cable connecting miner to auc converter can be found. I'm sure if I had the right name for it I can find it at a cable store?
Looks like a 4pin audio cable to a 5-1/2 cdrom.

It's a five pin cable between the AUC (AvalonMiner USB Converter) and the miner..

Here is a good advice from Phil for a replacement cable.
Does anyone know where you can find replacement  AUC3 I2C 5PIN Cable for the 741. Or even an option that would be a little longer?

https://www.amazon.com/gp/product/B013SY7P2U/ref=oh_aui_detailpage_o02_s00?

https://www.amazon.com/gp/product/B00O9Y80AK/ref=oh_aui_detailpage_o05_s00?


https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Delectronics&field-keywords=2.54mm+5+Pin+Female+to+Female+F%2FF+Jumper+Cable+Connector+


I have the top two they work.

use the colored ones

make sure the same  color is on the left  on both units




Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 02, 2018, 03:59:26 PM
Phil, did you mention you found a generic for the AUC cable on Amazon. I tried searching your posts but couldn't find it.

sure here it is


https://www.amazon.com/gp/product/B013SY7P2U/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1


https://www.amazon.com/gp/product/B00O9Y80AK/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1


the two above work I tested them with the 741 and 721.



I think these may work I ordered them today  to test

https://www.amazon.com/gp/product/B07BK12QBG/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1


If they work  I will have :

1 spare working rasp pi
3 spare  auc's
5 spare  cable's

I will be building a few more rasp pi's

I hope to have   those parts above as spares.


Title: Re: My review of Avalon 841 .
Post by: richdmz on May 02, 2018, 05:30:34 PM
Thanks guys! I will be sure to merit you too when it allows me.


Title: Re: My review of Avalon 841 .
Post by: notabeliever on May 03, 2018, 01:33:26 PM
I will fire up my 841 up soon with one of these tested setups so I'm glad you all were able to post the information for us.

Can  someone PM me the hosting site too.
With all this testing, what does one recommend for a 110V psu. The only option I see is to use two 750 or 850 psu's similar to what parallel miner sells. I have 1-850 (free) and 1-1200 (devoted to A721)  

It seems I can use a 1200 watt Parallelminer PSU with one of the settings mentioned.


Title: Re: My review of Avalon 841 .
Post by: HagssFIN on May 03, 2018, 01:53:19 PM
I will fire up my 841 up soon with one of these tested setups so I'm glad you all were able to post the information for us.

Can  someone PM me the hosting site too.
With all this testing, what does one recommend for a 110V psu. The only option I see is to use two 750 or 850 psu's similar to what parallel miner sells. I have 1-850 (free) and 1-1200 (devoted to A721)  

It seems I can use a 1200 watt Parallelminer PSU with one of the settings mentioned.


Yours best PSU option when running at 110V mains voltage
is two Hewlett-Packard 750W server PSUs kit with breakout boards and pci-e cables.  8)


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 03, 2018, 02:42:34 PM
I will fire up my 841 up soon with one of these tested setups so I'm glad you all were able to post the information for us.

Can  someone PM me the hosting site too.
With all this testing, what does one recommend for a 110V psu. The only option I see is to use two 750 or 850 psu's similar to what parallel miner sells. I have 1-850 (free) and 1-1200 (devoted to A721)  

It seems I can use a 1200 watt Parallelminer PSU with one of the settings mentioned.


good question

So far  I can go as low as -4  which drops me well under 1000  watts  in a cool room.  Just over 1000 watts in a warm room.

The hosting site has a 10k watt minimum.



https://i.imgur.com/6hQk04L.png

9718  gh  in a 90f room  using 1050 watts


--avalon8-voltage-level -4    this setting      will bullet proof you in hot rooms.

so if you are like me  and have a hotter space in the summer months   you can lower it

then raise it on the cool months to

--avalon8-voltage-level -1

--avalon8-voltage-level +2


look at  these numbers

Temperature©

35/69       the 35 means a warm intake    but that 69 is really cool

Fan

5550RPM / 98%   is not running top speed.

If I emptied  the room of the L3+s   temps will drop a lot.

With these tests I think the Avalon 841  is the best all around miner  for anyone that

can keep room temps under 80f

if your room runs at 90f  and you do not mind the downclocks  it is still really good.

I am going to check room temps  since It is getting warm in NJ today  82f at 10:42 AM

The garage has  4x L3's pulling 3200 watts
It has 1x  Avalon 841    pulling  1030 watts doing 9700 hash
It Has some gpus and usb sticks  670 watts

So it has 4900 watts  the temps are 87/88f



Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 03, 2018, 08:45:33 PM
Can Avalon 841 run on 110v?

yes  if you look at all my videos on this unit many are with a corsair ax1500i as the psu.

that runs on 110 volts


https://www.youtube.com/watch?v=KEctJaz4Mo0    this shows  max    i would not do a 110 volt line at this setting and temp

https://www.youtube.com/watch?v=fvWXJTYrW9o   somewhere in the middle

https://www.youtube.com/watch?v=xIe4dDiqnkQ    this shows  downclock


Title: Re: My review of Avalon 841 .
Post by: HagssFIN on May 03, 2018, 10:10:08 PM
Yep, but the Corsair is a lot more expensive than the 2x HP 750W server psu kit.

And server psus are more robust for mining than the ATX psus.


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 03, 2018, 11:32:45 PM
Yep, but the Corsair is a lot more expensive than the 2x HP 750W server psu kit.

And server psus are more robust for mining than the ATX psus.

I use server psus much more often then the Corsair.

I got four Corsair on sale for 860 usd which is still 215 usd each.

There are a few options

I like the hp 1200 server it does 900 watts at 110 volts

It can be found for 80 usd so two are 160 usd


Title: Re: My review of Avalon 841 .
Post by: notabeliever on May 04, 2018, 12:23:06 AM
Okay I can agree with the HP 1200 psu I bought from parallelminer for the A721. I think I know what to do thanks all


Title: Re: My review of Avalon 841 .
Post by: HagssFIN on May 04, 2018, 12:33:17 AM
Ok  I guess we all agree that HP rules!  ;D


Title: Re: My review of Avalon 841 .
Post by: fccs on May 04, 2018, 03:42:09 AM
So have we decided that -2 or -1 is the best for a room that is 95F?  Night time the room I have miners in is low 70s, during day if it's say 85 or 90 outside, it's about 95F inside the room.


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 04, 2018, 03:55:33 AM
So have we decided that -2 or -1 is the best for a room that is 95F?  Night time the room I have miners in is low 70s, during day if it's say 85 or 90 outside, it's about 95F inside the room.



--avalon8-voltage-level -3 = 10751.58GHs 32/66c 980 watts

--avalon8-voltage-level -2 = 11680.80GHs 33/67c 1071 watts

--avalon8-voltage-level -1 = 11878.42GHs 33/71C 1123 watts


my guess is try -2

report back on these numbers

Temperature©

37 / 73


you will be close to the 37 since the room is hot

maybe you will be 38/82   with the bold setting above.

since auto shut down is 105  (I would not go over 100)

my guess is try that bold setting.

your hash will drop a bit under 13000  but  you won't burn up the gear.

Note I am quoting megaquake's numbers above which are close to mine except his are in a cooler room then mine or yours.

So to repeat this setting

--avalon8-voltage-level -2      = 11680.80GHs   33/67c 1071 watts

but you are warmer so maybe you  do

11680.80GHs 38/80c 1121 watts

look for big differences and let us know what you get. So we can get a bigger data base.


Please note I asked steve of canon to sell me more gear as I want to do more tests and run 2  units.

My first test unit was free of charge .  The next one I am buying.




Title: Re: My review of Avalon 841 .
Post by: StevenMosher on May 04, 2018, 04:21:54 AM
If the numbers at 30C as printed are only for the benefit of showcasing the optimal performance temperature ranges, then I would have no problem with the Miner.

That's the intent.

the miner will operate up to 40C,  but above 30C the performance (efficiency) decreases  for SOME  machines.
So,  we would have speced,  40C  and then increased the +-  on the power consumption,  

There is  no issue about the warranty. you wont void the warranty.



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


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 04, 2018, 04:35:14 AM
Thanks Steve makes sense Because in a 95 f room with 39/92 set to stock clock

That 92 is still well under 105 shut down guard.

I am happy that slight downclocks are working so well NJ temps got to 90f today so the down clock worked well .

I know temps will moderate in fall and I will have a solid 7 months of above spec numbers.

So a few months of just short of spec are not a big deal at all.


Title: Re: My review of Avalon 841 .
Post by: StevenMosher on May 04, 2018, 04:53:27 AM
Thanks Steve makes sense Because in a 95 f room with 39/92 set to stock clock

That 92 is still well under 105 shut down guard.

I am happy that slight downclocks are working so well NJ temps got to 90f today so the down clock worked well .

I know temps will moderate in fall and I will have a solid 7 months of above spec numbers.

So a few months of just short of spec are not a big deal at all.

I've sent you a mail with an introduction to the local guru. The voltage setting are just one way to change the clock rates.
if you have the cooling and know what you are doing 14-16+ TH is achievable.  Basically  setting zero  gives you
a clock rate of around 750,  but the max is 1G, so theoretical max is 16.25. Do you have the instructions on bypassing
the standard voltage settings?

Finally,  I should probably invite a luck guy to come to beijing to write a overclocking/underclocking guide.
All expenses paid  + free miner. If anyone  on the forum is interested  write me at steve @ canaan.io


Title: Re: My review of Avalon 841 .
Post by: fccs on May 04, 2018, 05:36:12 AM
With the exception of today (being 89 degrees outside here in PA), even when it's warm out and in low 80s my garage ventilation handles it decently.  At normal stock not editing It stays under 100.  Barely, but nevertheless it's under 100 lol.  I would like to stay at 90 or under even if it's 90 degrees outside, that's why I'm looking into down clocking this a little bit for summer days.  So I put the -2 setting in both more options, and the command line make of it?  As of right now at 2am my 821's are running at a average of 32 / 79 and my 841's are running at a average of 36 / 89.  What's funny is these are literally right next to eachother.. it's 70 degrees outside and probably about 75 in garage with miners.


Title: Re: My review of Avalon 841 .
Post by: alh on May 04, 2018, 07:04:02 AM
Until here is more complete info coming from Phil, or Canaan, I thought I would suggest an additional method for tweaking the A841 configuration. I am betting that it's possible to combine the avalon8-voltage-level value along with the avalon8-voltage-level-offset value. In other words, use the voltage-level value to make larger adjustments, and then use the voltage-level-offset value to bias it slightly from the value set by voltage-level. I have just set my A841 to voltage-level -1 and a voltage-level-offset of +1. This clearly works in that the miner starts and runs for me, and with only 15 minutes of run time, it seems a smidge warmer and faster than the voltage-level -1 alone, but clearly slower and cooler than voltage-level-offset -2 alone.

I don't have a good way to measure power at this time, so may not really be able to flesh out this experiment fully. It would be really attractive for Canaan to elaborate on the way in which voltage-level and voltage-level-offset interact with each other, and how that translates into power/hear/speed.

I am currently running the March 5th Pi software that was available when I got my A841. The MM firmware is what was installed when I received the box ( 8411802-1e73b80).

Thanks to all the folks here that got me past the "placebo" GUI option for Voltage Offset that didn't seem to have an effect at all.


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 04, 2018, 11:13:41 AM
I am getting a second setup from them.
I will be able to create better testing this way.

I can  place one unit in an ac room  one unit in hot garage.

Do comparisons.
I can do newer firmware on one.


@ Alh  I think

it's possible to combine the avalon8-voltage-level value along with the avalon8-voltage-level-offset value.

Will do more testing on it.

I will also be getting some  sorcerer psus from canaan.

Should have some fun.


Title: Re: My review of Avalon 841 .
Post by: mgoz on May 07, 2018, 05:53:11 PM
anyone checked hardware errors on these various voltage settings?  Add up the HW[] values in the log output.  I suspect they will be rather high on the dramatic voltage changes.  Hash rate is raw and will include all the errors

For some reason Canaan support told me HW is not hardware errors and that values there don't matter. I have hundreds in 24H period with factory settings.


Title: Re: My review of Avalon 841 .
Post by: yxt on May 07, 2018, 10:37:06 PM
anyone checked hardware errors on these various voltage settings?  Add up the HW[] values in the log output.  I suspect they will be rather high on the dramatic voltage changes.  Hash rate is raw and will include all the errors

For some reason Canaan support told me HW is not hardware errors and that values there don't matter. I have hundreds in 24H period with factory settings.

The reason is that this number means nothing ;)


Title: Re: My review of Avalon 841 .
Post by: akadamson on May 07, 2018, 11:41:12 PM
anyone checked hardware errors on these various voltage settings?  Add up the HW[] values in the log output.  I suspect they will be rather high on the dramatic voltage changes.  Hash rate is raw and will include all the errors

For some reason Canaan support told me HW is not hardware errors and that values there don't matter. I have hundreds in 24H period with factory settings.

I typically see approx 1% can be as high as 1.5%, doesn't matter if 841, or 821


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 11, 2018, 11:57:21 PM
I got some more avalon 841 in and a sorcerer psu  and will do a few tests with them.

############################################################
############################################################
watts 1279
hash  12654
temp © 32/72
fans  100%

room temp 82f

but gear is near an ac vent which highs to cool off gear.

more options setting is below
--avalon8-voltage-level -1

time of test is 1h 24m 53s

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

More Options setting of next test is
--avalon8-voltage-level -5

this is the lowest test I have tried to date
watts 1012
hash ---------waiting for hash rate to settle in
temp © 30/67
fans 81%
room temp 82f

time will do at least 1 hr

the - 5  setting seems to be as low as I can clock
full size images

https://i.imgur.com/7YTFW0c.png (https://i.imgur.com/7YTFW0c.png) https://i.imgur.com/21l4ag4.png (https://i.imgur.com/21l4ag4.png)

hash 8500
watts 950
temp© 29 / 65
fans 61%
room temp
time  9h 6m 12s

https://i.imgur.com/BE5n5OR.png (https://i.imgur.com/BE5n5OR.png) https://i.imgur.com/g2BuqEG.png (https://i.imgur.com/g2BuqEG.png)

I took some photos of this test bed setup note room is 83f but it is taken on top of a tv setup and reads high.  I placed the psu to get cooling from an ac vent.

watts 950

https://i.imgur.com/ok9TAfx.jpg (https://i.imgur.com/ok9TAfx.jpg)

temp is at 6 foot height about 9 feet away from gear

https://i.imgur.com/58qNry5.jpg (https://i.imgur.com/58qNry5.jpg)

gear note corsair ax1500i psu

https://i.imgur.com/hgKQOBr.jpg (https://i.imgur.com/hgKQOBr.jpg)

note ac vent which does push some cool air towards psu

https://i.imgur.com/JRGajIh.jpg (https://i.imgur.com/JRGajIh.jpg)


8500 using 950 watts is about 0.111 watts a gh the point of tests like this is to show work arounds it means you could use any 1200 watt atx psu in a pinch even with 120 volt power.
it also allows for use in a hot space during the summer.
this gear should not have overheating issues at this setting if you area to mine is fan cooled  and runs warm in the summer  this setting should work for you.


here are the five under clocks  that work for me

--avalon8-voltage-level -1
--avalon8-voltage-level -2
--avalon8-voltage-level -3
--avalon8-voltage-level -4
--avalon8-voltage-level -5   lowest numbers      8500 hash at 950 watts runs very cool


the 2 below did weird shit and acted like overclocks not under clocks
--avalon8-voltage-level -6
--avalon8-voltage-level -8


Title: Re: My review of Avalon 841 .
Post by: ogombii on May 12, 2018, 07:43:15 PM
Hi,

Thanks for sharing, do you any tests on the safest overclock settings suitable for situations where heat is not an issue nor electricity costs?

Thanks.



Moderator's note: This post was edited by frodocooper to remove an unnecessary quote.


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on May 12, 2018, 08:45:52 PM
I have yet to try over clock modes.

I simply don't  have the cooling available.

I know that  in a 67f room  which I can't do again until it gets cold outside  I got my best results

I am pretty sure   in a 60f room  you can do an overclock and get 14th with good numbers
I am certain in a 50f room  you can do an overclock and gt 14.2 th with good numbers.

But I can't create that environment unit the fall.

there have to be some people with a good psu  that will do 2400 watts such as the delta sold by parallel miner
or the hp 2450 watt psu that can do a solid over clock in a cool room.

EDIT  it is mom's day and I guess ogombil's mom wants some numbers for overclock
we had a t-storm and this morning it is 55f so I am doing some overclock

i did not get above 13900 using  any setting

my best was

watts 1414
hash 13900
temp© 20/69

on --avalon8-voltage-level-offset +1

note to be sure I had lots of psu overhead I did 2 bitmain apw3++ which were using 240 volts and 1414 watts since they can provide close to 3000 volts I had lots of overhead.


Title: Re: My review of Avalon 841 .
Post by: ogombii on May 14, 2018, 09:09:20 PM
EDIT  it is mom's day and I guess ogombil's mom wants some numbers for overclock
we had a t-storm and this morning it is 55f so I am doing some overclock

i did not get above 13900 using  any setting

my best was

watts 1414
hash 13900
temp© 20/69

on --avalon8-voltage-level-offset +1

note to be sure I had lots of psu overhead I did 2 bitmain apw3++ which were using 240 volts and 1414 watts since they can provide close to 3000 volts I had lots of overhead.

Top Man!

Thanks for the proof of concept, I tried replicating your test, similar results.  I guess its best to leave on default(--avalon8-voltage-level-offset 0), I get roughly 13700 @ 21/65 and 13550 @19/66 for the other 841.

Thank you very much


Title: Re: My review of Avalon 841 .
Post by: NotFuzzyWarm on May 16, 2018, 11:26:12 PM
Well this is working out well....
Today just got another A841 in from Blockforge, also was able to add my last of 6 741's to the main farm and wadda ya know... One of my T9's has a board that went titsup so took it offline. Worse is that a batch-11 s9 I have as a 'spare' seems to want to run hotter than the hubs of hell, lord knows what the power draw is. Even underclocked to 533 temps are still around 100-105C.
Woof. All in the timing I guess http://www.sherv.net/cm/emoticons/butter/sour-face-smiley-emoticon.png (http://www.sherv.net/)
Anywho, good timing for the A8 to arrive! Taking the hot s9 back offline and replacing with the 841. Keep this up and soon most of my farm with be Avalons http://www.sherv.net/cm/emo/happy/happy-dog-smiley-emoticon.gif (http://www.sherv.net/)


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on June 10, 2018, 02:44:30 PM
If the room rate is 95F, I think you will have problems. I have one that rarely runs longer than 24 hours at 20C and the receiver temperature is constantly 28-30C for some reason.You may or may not get the results you are looking for right now. I have two working in my basement, here's the pace at which they work, with the shift -1/32/75 and 31/77 with suction pulling the cold air and most of the heat, I live about an hour of ST. Pittsburgh, Pennsylvania.

when set to lower voltage numbers gear runs okay at 95f

If your gear is not working at 20c  

you have:
 bad unit:
 bad psu
 or you set voltage too high 0 or +1

none of us had issues at 20c

Maybe a bug got stuck in the gear.


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on August 11, 2018, 06:38:18 PM
bump as it make referral to the 851 thread easy


Title: Re: My review of Avalon 841 .
Post by: Steamtyme on August 11, 2018, 06:47:32 PM
Glad you did, not sure how but I missed how far you went with the underclocking.

I haven't gone any further than -2, so far the heat hasn't called for it but nice to know the options available.


Title: Re: My review of Avalon 841 .
Post by: dutchlincoln on September 23, 2018, 05:44:55 PM
hi,

What is best efficiency/hash setting for the 841?
Thought it was a bit better as the bitmain..


Title: Re: My review of Avalon 841 .
Post by: HagssFIN on September 23, 2018, 05:50:37 PM
hi,

What is best efficiency/hash setting for the 841?
Thought it was a bit better as the bitmain..

Try to set the voltage offset to -1 or -2. See my review/guide for details. The link is in my signature space.


Title: Re: My review of Avalon 841 .
Post by: gvb on October 14, 2018, 12:23:59 PM
thanks for those who pointed at the usage of the none "-offset" method.

using the -offset method with 0, -1 or -2 always ended with a steady 13Th.

without the -offset it actually seems to work to tweak the speed.

-2 ~9.600Th
-1 ~10.950Th
0 ~12.500Th

the miner is currently in a garden cabine/shed so the fan is at 100% (36/77) because it's a late summer day
so it gets quite warm inthere but as there is a lot of wind I left the door open and let it blow throught the door.
last night it was also at 100% speed while the temps were 27/72.

The noise is a lot louder than the 741 due to the 30C (?) max limit.

Is it worth trying to use this fan to lower the noice/wattage?

https://www.parallelminer.com/product/avalon-841-fan-replacement-delta-dx-62-4500-rpm-191-cfm-55-dba-120mm-x-38mm-a821-asic-miner-fan-copy/

the miner will end up in a small 20C air conditioned room so it should be less loud than now but any DBs lower is always nice.


Title: Re: My review of Avalon 841 .
Post by: minefarmbuy on October 14, 2018, 05:21:25 PM
4500 rpm is under spec, you're db's will be lower but the temp in the unit will likely increase at 100% an speed.

Some cheap sound foam will still help if there is a lot of acoustic reflection. Just speculating at this point.


Title: Re: My review of Avalon 841 .
Post by: gvb on October 15, 2018, 10:45:18 PM
I don't think that lower rpm always means being worse. better blade placement can lead to better airflow at lower rpms.

I placed it in a server rack with those perforated doors on it.

But it doesn't seem to drop below 29C so it's alternating between 5700-5800 rpm which is still near 100%.

I have to admit that the pull in side is aimed to the pull out of another rack 1.5m in front of it.
Maybe it pulls in warm air from that rack.

I'll rotate it 180 degrees maybe that makes the temp. drop more as there is no heat on that side and the airco is above that area.


Title: Re: My review of Avalon 841 .
Post by: minefarmbuy on October 15, 2018, 10:54:55 PM
Maybe, but 191 CFM seems weak though. Most likely that is at max power? Try the fan let us know.


Title: Re: My review of Avalon 841 .
Post by: gvb on October 15, 2018, 11:20:34 PM
the original is 210CFM at 6000rpm.

this one 190CFM at 4500.

if you multiply 4500 by 1.35 you're just above 6000 and that would give a theoretical 256CFM (190*1.35)
so it 'seems' to perform better airflow wise.

I can't seem to find it in europe so I'll have to order it in the US so that will take a while before I can test it (if I order it).


Title: Re: My review of Avalon 841 .
Post by: minefarmbuy on October 15, 2018, 11:38:38 PM
http://www.delta-fan.com/subcategory.aspx?id=17


Title: Re: My review of Avalon 841 .
Post by: gvb on October 16, 2018, 04:38:29 PM
turning the box to the non-warm side of the cabinet didn't help at all.

still hovering between 29-31C at 3700-3800 rpm.

maybe there's dust between the heatsink parts as the other 841 could work at 26C in a shed that was 10+C warmer than this 19C room.

I wonder why they've put that limit so low. it worked before without problems around 36C.
If the limit was set to 34C or so the fan speed/noise would drop a lot.



ok, I opened the miner and did a good dust clean up with compressed air.

now it's showing 28/75 but still a fan running at 100%  :(


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on October 17, 2018, 01:23:13 PM
you have a weak fan  it only goes to 4500 rpm  vs stock which will do more than 5500 rpm


Title: Re: My review of Avalon 841 .
Post by: gvb on October 18, 2018, 08:53:39 AM
no Philip, it's still the original fan that runs at 5850rpm when it shows 100%.

I guess the only option to reduce the noise is to put it in a box with PUR or other foam in it to reduce the sound like others did.


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on October 22, 2018, 03:51:19 AM
I got some more avalon 841 in and a sorcerer psu  and will do a few tests with them.

[...]

I listed two of these for sale with or with out rasp pi the listing is in marketplace.


Title: Re: My review of Avalon 841 .
Post by: gvb on October 23, 2018, 07:26:11 PM
I think I figured out how things work.

It's getting a bit colder now at night and now it's working at 22/65 at 13.005TH although the speed is still 5760/92%.

Apparently the fan speed is controlled by the hash speed and not only taking the actual temperature into account.

If it did it would spin a lot lower or more variable (4000-6000rpm) at this temperature I guess.

you can also see this after stopping and starting the miner again.
it barely increases the first 8TH and can do 70-75C at 2000 rpm for a while till it goes beyond 10TH then speed increases with almost every 0.1TH.


Title: Re: My review of Avalon 841 .
Post by: Megaquake on October 24, 2018, 07:10:10 AM
I think I figured out how things work.

It's getting a bit colder now at night and now it's working at 22/65 at 13.005TH although the speed is still 5760/92%.

Apparently the fan speed is controlled by the hash speed and not only taking the actual temperature into account.

If it did it would spin a lot lower or more variable (4000-6000rpm) at this temperature I guess.

you can also see this after stopping and starting the miner again.
it barely increases the first 8TH and can do 70-75C at 2000 rpm for a while till it goes beyond 10TH then speed increases with almost every 0.1TH.

You can use --avalon8-temp to change the temperature threshold for auto fan, say for example set it to 70 and the minimum fan speed 40, it will stay at 40 till the chip temp hits 70 then the fans start ramping up but be careful with these settings, I have mine set and they are fairly quiet.


Title: Re: My review of Avalon 841 .
Post by: Trinislacker on March 04, 2019, 10:57:55 PM
Hey guys,

I’ve got an 841 that’s hashing at 5.5THs it’s been like that for a couple days. Reboot does nothing. This unit has 2 hashing boards? Can I tell if ones failed? Thanks.


Title: Re: My review of Avalon 841 .
Post by: Steamtyme on March 04, 2019, 11:33:01 PM
Can you post a screen shot of the logs and miner status?

Here is a link to the troubleshooting guide (https://bitcointalk.org/index.php?topic=3224256.0) it will tell you everything you need to know to uncover most of the common issues. In the meantime you should double check that all connections to the miner from the PSU are made.

Some of the main things you'll look for in the log are - MW0, MW1, MW2, MW3. These represent hashboards. ECHU and ECMM are error codes.

Good luck.


Title: Re: My review of Avalon 841 .
Post by: Trinislacker on March 05, 2019, 12:37:00 AM
Can you post a screen shot of the logs and miner status?

Here is a link to the troubleshooting guide (https://bitcointalk.org/index.php?topic=3224256.0) it will tell you everything you need to know to uncover most of the common issues. In the meantime you should double check that all connections to the miner from the PSU are made.

Some of the main things you'll look for in the log are - MW0, MW1, MW2, MW3. These represent hashboards. ECHU and ECMM are error codes.

Good luck.

Great information here. so MW0 and MW1 are "0" and the ECHU is saying 134145 . cant seem to find that error code in the list of codes.

Code:
 MW0[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
    MW1[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
    MW2[20 20 25 23 20 30 23 20 19 23 26 22 29 30 23 20 23 22 19 25 20 19 21 28 21 29]
    MW3[24 25 22 21 19 27 26 22 18 20 17 23 25 21 24 22 16 28 23 24 26 27 22 22 27 20]
ECHU[134145 134145 0 0]


Title: Re: My review of Avalon 841 .
Post by: Steamtyme on March 05, 2019, 12:42:05 AM
Sorry just on mobile.

The error codes are additive, so you will have a few together.

That shows you have 2 boards down like you suspected. It may be the PMU board that is bad or 2 bad boards.

There is also the chance it's the cables from the PSU to that PMU board. Can you try swapping connections and see if the problem moves. Considering this may be a spare parts issue, where did you buy the miner?

Also what are you using for a PSU, do you have another one to try?

Edit: I believe you have these 4 codes:

CODE_HUFAILED
CODE_PGFAILED
CODE_INVALIDPMU
CODE_IDLE

I believe those 4 give the right total, but must admit i'm unaware if it's possible for another combination to provide the same error code.


Title: Re: My review of Avalon 841 .
Post by: Trinislacker on March 05, 2019, 08:41:01 PM
I’ve determined it’s a failed PMU board. I purchased this unit from Blokforge in September, the psu actually failed in January. I’ll see if they can assist.


Title: Re: My review of Avalon 841 .
Post by: Steamtyme on March 06, 2019, 01:02:52 PM
They've always been pretty good to deal with. Not sure if you opened the miner up or not but if you do here's a thread/video I did last year.

https://bitcointalk.org/index.php?topic=4776533.msg43126387#msg43126387

Let us know how it turns out.


Title: Re: My review of Avalon 841 .
Post by: Trinislacker on March 14, 2019, 06:33:25 PM
They've always been pretty good to deal with. Not sure if you opened the miner up or not but if you do here's a thread/video I did last year.

https://bitcointalk.org/index.php?topic=4776533.msg43126387#msg43126387

Let us know how it turns out.

Really great thread. Used it to help with troubleshooting. Still waiting on Blokforge to respond after almost two weeks.


Title: Re: My review of Avalon 841 .
Post by: Steamtyme on March 14, 2019, 06:42:56 PM
Glad you liked it. That's weird for them to take so long to reply. If it were me I would try calling their 1-800 number to see if you can reach somebody. Did you also start a ticket with Canaan? Doesn't hurt to try all avenues.

I can dig around as well, depending on which PMU I may have a spare around. It would have been left over replacement parts from when I did that video. If things don't work out with your tickets, I could ship that one out to you. My 841 is working fine at the moment, and is nearing being taken offline.

Good Luck


Title: Re: My review of Avalon 841 .
Post by: minefarmbuy on March 14, 2019, 06:55:01 PM
Take pictures or screenshots of the issue and contact Canaan directly with your BF invoice. Canaan was really responsive for me personally.


Title: Re: My review of Avalon 841 .
Post by: cottora on February 06, 2020, 07:55:19 PM
[...]

Sorry to dig up an old thread...Is there any way to make these voltage adjust via the command-line?  Essentially, if the room temperature exceeds a certain value then a command would be automatically sent (perhaps via windows CMD).

Thanks.


Title: Re: My review of Avalon 841 .
Post by: NotFuzzyWarm on February 07, 2020, 01:50:43 PM
AFAIK, no. Voltage changes require reboots/restart of cgminer though that can all be done via scripts.


Title: Re: My review of Avalon 841 .
Post by: PassThePopcorn on February 07, 2020, 07:21:53 PM
It can be done, no reboot or restart required.


Title: Re: My review of Avalon 841 .
Post by: cottora on February 09, 2020, 09:42:26 PM
If there is interest in helping us write a script/command, please DM me. We have 750 units.  Thanks


Title: Re: My review of Avalon 841 .
Post by: philipma1957 on February 23, 2020, 04:45:24 PM
If there is interest in helping us write a script/command, please DM me. We have 750 units.  Thanks

Please post back here I will effort to help out.


Title: Re: My review of Avalon 841 .
Post by: cottora on February 23, 2020, 05:00:54 PM
I think that one solution will be to have Awesome Miner send a SSH command.  I have played with the SSH commands but cannot seem to get the miner to change voltage levels.  I am not very versed outside of Windows and MySQL (but I grew up in the old DOS command days).