Avalon 851 on its way.

[HagssFIN]

Yeah, I think that the Plus version should be compatible with the original Rasp Pi 3 B.

[1714177066]

1714177066

[philipma1957]

the plain model 3b came and boots

the model 3b+  does not

so either my rasp pi 3b+ is a dud or the 6/28 firmware works on model 3 only.

next step is firing up unit.

she is working yeah baby.

Settings are a slight voltage down clock

and this is a myrig psu

[HagssFIN]

Ok, thanks for testing it out!

So it's better to buy the original Pi 3 if you want to be absolutely sure that it works.

[NotFuzzyWarm]

My guess is that his RasPi is DOA. 2 out of 3 that I've gotten last month (both branded Avalon ones from Blokforge, separate orders) were dead. In 1 the CPU instantly got literally smokin' hot, the 2nd no signs of life at all. BF of course promptly replaced both.

[philipma1957]

My guess is that his RasPi is DOA. 2 out of 3 that I've gotten last month (both branded Avalon ones from Blokforge, separate orders) were dead. In 1 the CPU instantly got literally smokin' hot, the 2nd no signs of life at all. BF of course promptly replaced both.

I don't know if it is dead but I am going to return the 3b+

I ran one 851 overnight



so it runs fine in an 83f room  but  watts are

1550  for 14500 hash

this is using a myrig psu

I have many other psu's  and will start a test today   using the gold rated 2450 watt hp next

I think I will try another watts meter

[minefarmbuy]

1550  for 14500 hash

1550 seems high or is just my novice assumption?

[philipma1957]

1550 seems high or is just my novice assumption?

actually I am getting worse numbers then that

while the 14,500 hash is nice I got numbers over 1600 watts in a 83f room

I moved it to a hotter room for more testing

I will need to play with settings it will take more then a day to get a feel for what it really does.

[ogombii]

all indications show that the 1600w sorcerer psu isnt enough for the Avalon 851s, best to buy 1800w psu from now on!  Even Bitmain has stopped selling 1600w psu.

[philipma1957]

I moved it to a warmer space.
I set it up with a hp 2450 gold psu.
It hashes well at over 14200
It pulls more then 1850 watts

I have -2 power setting.

The room is hot 90 f

if you look here it is obvious my settings are not underclocking the gear.

I will power off as temps on gear are too hot

[suchmoon]

I moved it to a warmer space.
I set it up with a hp 2450 gold psu.
It hashes well at over 14200
It pulls more then 1850 watts

That sounds quite horrible. Have you tried an 841 on the same PSU? I wonder how 851 compares to 841 in the exact same conditions.

[philipma1957]

That sounds quite horrible. Have you tried an 841 on the same PSU? I wonder how 851 compares to 841 in the exact same conditions.

i did extensive testing and got much better efficiency with the 841s

Less hash but good numbers.

So far two psus show bad numbers.

[Steamtyme]

Looks like it's a power over efficiency model. I wonder if it's something they can adjust through firmware?

I see the first test was voltage-level- -1

And the second was voltage-level-offset -2

if you look here it is obvious my settings are not underclocking the gear.

With the 841 I'm running, when it's above 30C temperatures using the offset command is borderline shutdown? Did you try just the level -2 option?

Were you seeing any change with any of the voltage adjustments from baseline?

It would be a shame to lose that control, as it was a life saver with the 841.

[philipma1957]

Tired tonight.   I have six or seven ways to try. I will do so on Sat

[philipma1957]

okay so using this psu this morning I killed my power meter

https://www.ebay.com/itm/2450W-Power-Supply-Server-PSU-Plug-n-Play-Wiring-ASIC-GPU-Mining-Rig-10x-PCIe/332624669561?

and before the meter died it was showing 1850 watts for 14900

so far I can't get gear to down clock I get 14200 to 14900  and use 1500 to 1850 watts

I have a second meter will hook it up

But what I want to see is can i get this gear to run at 13500 and 1350 on some kind of a down clock

14.2 to 14.9 th is nice but  not at all the extra power use.

I also ordered a few more meters to test gear.

stock settings below

[taserz]

Just grab the bitmain APW5+ off ebay for like $150-$175 they work great and are rated up to 2600w

[philipma1957]

Just grab the bitmain APW5+ off ebay for like $150-$175 they work great and are rated up to 2600w

I have endless psu's  not that one but   the issue is watts and efficiency.

the gold hp does 2500 watts zero issues.
the plat delta I have does 2500 watts zero issues.

The 851 seems to spend way more power for an extra 1 to 1.5 th

the 841  sets lower  to 12.9 th and burns 1310 watts in a hot room when down clocked

this unit won't get under 1400 watts or even 1500 watts   and it gives me 14.2 to 14.9 th

I don't mind the higher hash rates I do mind the much higher power use-age

my meters tend to overheat and die at 1850 watts plus .

I will try with remaining meter to see what I do at stock setting.

[philipma1957]

this is 841 info  I am going to try these two settings for the 851

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

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/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/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

temp is at 6 foot height about 9 feet away from gear
https://i.imgur.com/58qNry5.jpg

gear note corsair ax1500i psu
https://i.imgur.com/hgKQOBr.jpg

note ac vent which does push some cool air towards psu
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

[philipma1957]

Finally some down clock numbers that look okay

under more options this setting

--avalon8-voltage-level -4

is using only 1305 watts

[Steamtyme]

Wow that's a significant drop in power consumption; almost 1/3. Hopefully the hash hasn't dropped off to much.

Did you get any results at -3?

And yay, it didn't fry another power meter.

[philipma1957]

Wow that's a significant drop in power consumption; almost 1/3. Hopefully the hash hasn't dropped off to much.

Did you get any results at -3?

And yay, it didn't fry another power meter.

okay at -4

--avalon8-voltage-level -4

settled in at 1260 watts on the corsair 1500ax tit model

have to wait on hash rate to settle it is maybe 12202.40

and 1260/12202 is okay  right near 103 watts a th

that is  spec as this is supposed to be a bit more power hungry

I am going to add a second unit and see what happens.

with 2 of three meters burnt out  and 1 left I can only meter 1 unit not both

3 meters will show tomorrow I can post power use then.