My review of Avalon 841 .

[philipma1957]

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

[Megaquake]

Small update: still running --avalon8-voltage-level +2 with the Delta 2400 PSU 13367.97GHs 34/78c 1320 watts

[philipma1957]

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

[Megaquake]

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

[HagssFIN]

Wow. The 'under 1kW' result is quite amazing,
thank you very much sharing your method and results. 

[Megaquake]

--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!

[richdmz]

--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?

[Megaquake]

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

[philipma1957]

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.

[Megaquake]

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/

[Megaquake]

--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

[HagssFIN]

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.

[Megaquake]

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

[Megaquake]

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 

[akadamson]

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%

[Megaquake]

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

[philipma1957]

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
   [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
)
[STATS2] =>
(
   [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
)
[STATS3] =>
(
   [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
)

[/code]

[TheYankeesWin!]

Phil did you set it to -4?

[philipma1957]

@ 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

[richdmz]

Phil, did you mention you found a generic for the AUC cable on Amazon. I tried searching your posts but couldn't find it.