AVALON 841 Farm Help

[IVIindless]

Hello,

I have multiple small bitmain miner(16 miners or so) setups, but we are looking at setting up a farm of 400 Avalon miners(used and cheap). We have access to pretty much 100% free power using waste gas to generate power. Im not familiar with the Avalon miners but do I need anything special or can i just plug them all into compounded routers and switches? What are the controllers i see for?

[1714579484]

1714579484

[philipma1957]

the rasp pi controller can do four ports each port will run up to five 841

so 20 per rasp pi

four hundred 841 means

400/20 = 20 rasp pi’s at best.

for practical purposes

using four ports with four miners doing 16 per rasp pi is more reliable.

so plan on 400/16 = 25 rasp pi’s

now there are avalon firmwares to load on a sdcard

you need 1 sd card per rasp pi

i have not run avalon 841 in years.

but you need to find firmware image on avalon website and match to proper rasp pi.

ie

rasp pi 2
rasp pi 3
rasp pi 4

all would need proper firmware image.

I will look to see which images are available so you can buy correct rasp pi

this is a mining support question so i am asking to have mods move it to btc mining support section.

I asked mods to move this to mining support.

Download.canaan-creative.com

brings you to all canaan firmware.

including 841 firmware.

but i simply don’t remember which rasp pi you need.

btw you will need a lot of specialty wires and dongles.

four dongles to a rasp pi.

which means a lot also
a daisy chain wire

eth
to rasp pi
4 wires to four dongles
then you have four daisy chains

dongle -daisywire-841-daisywire-841-daisywire-841-daisywire-841

that is a lot of wiring to do.

that is 25 rasp pi with four ports

and 100 four miner chains. like the one in bold

you do save on eth cables only 20 to 25.

you need 25 wall warts to power each rasp pi.

[IVIindless]

so short answer is you have to chain them cant just plug them into the internet like i do with bitmain

[NotFuzzyWarm]

Very depressing that so many tech folks do not know how to use a search engine...
Using "how to connect Avalon miners" brings up a slew of very detailed answers. This is the best one

so short answer is you have to chain them cant just plug them into the internet like i do with bitmain

Correct. However, unlike BM gear they are extremely tweakable and damn near bulletproof.

[philipma1957]

Once you get past the wiring the gear is very good.

[NotFuzzyWarm]

Since yer looking at 841's,you may want to investigate Canaan's Moose - a module that pre-packaged 12 of them with controller, PSU's and 2-plug power in a single easy to connect unit. Even the power input of 365-418VAC 3-phase w/neutral  should fit right in with typical large field operations gensets. Not sure how many of them Canaan sold but chances are there are some out there at a good price...

That said, the Avalons are the best way to go considering you are using flare gas. Look at it this way, would you rather track/control 400 different IP addresses having to set worker name & pool info on all of them? Or, would you rather just deal with 20 841 clusters, each cluster being 20 miners with a single IP address and mining info input?

Accessing a controller will give you stats on all 20 miners attached to it including the option to individually reboot any single one, multiples, or all of them.

[HagssFIN]

Read my 841 guide, the link is in my signature

[IVIindless]

Okay Guys, thanks I was unsure of the Avalon's since i have zero experience with them. the 841's look like they are rated at 13.6 with a max of 14.3, would it be safe to assume 14.0 th when working my economics?

[mikeywith]

would you rather just deal with 20 841 clusters, each cluster being 20 miners with a single IP address and mining info input?

There is a downside to this way of operation, having 400 individual IPs and most importantly workers gives you the ability to keep track of everything from the pool-side, when I look at the pool status using the app on my phone or a "watch link" even from untrusted device, I can tell if there is a problem with any given miner, so i can call my guy and ask him to reboot miner xxx.

Having 20 miners with the same worker will require a local access in order to troubleshoot the bad unit, also as far as setting up a ton of miners it's no longer an issue with so many programs that will handle that for you in no time, so this isn't really an advantage but rather a disadvantage ( a minor one to be reasonable), however, less network cabling / switches is the only advantage in having clusters of 20 miners.

With that being said and without owning any of these avalon gears, based on your words and the other trusted members, I can tell that they are way more robust than the equivalent of bitmain's S9, the only advantage that S9s have over these gears is the ability to downclock them down to 70w/th, not sure of these Avalon gears can do 70w/th but since he has free power his main focus should be on durability and lifespan which without a doubt favours Avalon 841.

[philipma1957]

Okay Guys, thanks I was unsure of the Avalon's since i have zero experience with them. the 841's look like they are rated at 13.6 with a max of 14.3, would it be safe to assume 14.0 th when working my economics?

No think 13.0. always better to fudge in less profit.

Then if they average 13.8. you think the  .8 is a bonus.


Also 20c is a ambient temp 40c is not.

So they run better in 40-60f temps. then 90-100f temps

I would think you get 13.8 to 14 in the cooler weather.

and 13.1 to 13.6 in the hotter weather.

oh they run a little higher hash with four chains of four

then with four chains of five.