Avalon 8 official specs released

[HagssFIN]

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

Thanks,
but don't underestimate yourself, I would love to see some other A841 reviews besides my review. 

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[akadamson]

I've made this reply here at least 2 times and for some reason the moderator thinks it's not applicable so it gets deleted... Any bets on the third time...

a) you *can* set the fan speed down to  something lower than 100% (I set my 821's to 50% for example) but it will take an inlet temp of around 25-26C to see the fan spin lower than 100%
b) the new ASICs are way less temp tolerant than the old ones and as such Canaan doesn't recommend running them over 70C - which is why the fans speed was locked to 100%.

[DPoS2]

I've made this reply here at least 2 times and for some reason the moderator thinks it's not applicable so it gets deleted... Any bets on the third time...

a) you *can* set the fan speed down to  something lower than 100% (I set my 821's to 50% for example) but it will take an inlet temp of around 25-26C to see the fan spin lower than 100%
b) the new ASICs are way less temp tolerant than the old ones and as such Canaan doesn't recommend running them over 70C - which is why the fans speed was locked to 100%.

Yeah things get deleted all the time..  maybe when spring starts he'll get a girlfriend and get bored with this wack a mole routine..

anyway, glad you posted since it made me realize to move my miners to an open window since it is still cold around here and then it was easy to drop the fans down to 50% min..  I could go lower but don't want to chance anything.   The temps are really low once you get the inlet under 20C

[Thetaj]

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

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

Honestly speaking, I don't know much about the software. But if based just on the hardware specs, I'd say it your assumption is probably not that far off.

[richdmz]

anyone see any issue with placing the PSU on top of each unit or would it be best to space them?

[ccgllc]

anyone see any issue with placing the PSU on top of each unit or would it be best to space them?

I place my Antminer APW3++ power supplies on top, on their side, with the angled section aligned to the frame of the Avalons.  Looks nice, works fine.

[ccgllc]

As was reported (and deleted) on another thread, it appears Canaan has reduced the intake air specification from 40C to 30C (104F to 86F).

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

This means the equipment is no longer spec'ed to work within ASHRAE guidelines (the industry standard).

Most new computing equipment is designed to meet the ASHRAE 2015 thermal guidelines of at LEAST class A2 (up to 35C) and most handle class A3 (up to 40C) or class A4 (up to 45C).  30C is not even class A1 (32C).  

So Canaan is now making "industrial" miners that are not designed for modern industrial data centers??!?!

The only way to be in spec now is to either be in an old inefficient data center that still provides the classic 18-27C cooling air or some similarly costly environment (unless your data center's intake air never exceeds 86F - possibly doable in northern regions).

Personally very disappointed with this, since I previously considered Avalons my premium minor (over my S9s).

[HagssFIN]

I think that they should test it some more and be as accurate with the specs as possible.

I think it should be possible to class it  as a A1 class or A2 class device.

[ccgllc]

I think that they should test it some more and be as accurate with the specs as possible.

I think it should be possible to class it  as a A1 class or A2 class device.

Agree with that, however many have been purchased with the understanding they were class A3 devices (at least in terms of acceptable maximum cooling air temp).

A3 is really considered the minimum for modern data centers.

[HagssFIN]

I sent an email to Steven, let's see if they have some lab test info or etc.  which could help to specify the A841 technical specs more accurately.

[ccgllc]

I sent an email to Steven, let's see if they have some lab test info or etc.  which could help to specify the A841 technical specs more accurately.

In my mind, this is more of a "recall" than just a change in specs.  My data centers, with over 150 miners in it, is outside air cooled.  In my area, I might have a few afternoons a year, in an exceptionally hot year, where the outside air is > 40C.  I will have MONTHS of afternoon air temps > 30C.  This is a huge deal.

(Full disclosure:  Most of those miners were previously bought S9s with 40C temp ceilings.  With my latest order, there will only be 16 Avalon 8s in there, but they WERE my expansion choice - now I may need to reconsider.)

[HagssFIN]

Just wait for Steven's reply,
I think that he will answer pretty quickly and might even come and post here at the forum.

I will let you know when I know more.

[ccgllc]

Just wait for Steven's reply,
I think that he will answer pretty quickly and might even come and post here at the forum.

I will let you know when I know more.

Will do.

[PeaMine]

Wow, that is sad that they deleted my post.
At least it wasn't a shadow delete, as I can see it missing now.
I guess an official reseller of Canaan deemed my post, which is pointing out a possible fire hazard to clients, as off-topic and needs to be deleted.
I've worked at datacenters for over a decade, and if anything widely used changed from 40C to 30C, it would be something that needs to be addressed publicly and quickly.
30C even in active cooling situations could be near impossible in the case of running on backup power; however realistically most mining farms are passively cooled and 30C is only possible 365 days a year in very select locations.
Also, this change was done on Blokforge's website as well without any email notification, so it is indeed on topic.  
I already cut all business ties over Minerwarez, and wasn't alone when I left with several other known BCT members as well as personal recommendations I had made due to shady business https://bitcointalk.org/index.php?topic=2277516.140
This squelching has left me with no option for purchasing from Canaan or recommending them.

----
A reply of yours, quoted below, was deleted by a Bitcoin Forum moderator. Posts are most frequently deleted because they are off-topic, though they can also be deleted for other reasons. In the future, please avoid posting things that need to be deleted.

Quote
I noticed on both the Canaan website and Blokforge that the heat ranges have been lowered by 10 degrees Celsius.
It use to be 40, and now it is 30.
https://bitcointalk.org/index.php?topic=2616205.0
I didn't get an email about this, and this much of a change would put several miners and farms out of range for this.  Usually that would result in a recall or notification as the norm has been 40C for most miners up until now.

[HagssFIN]

Wow, that is sad that they deleted my post.
At least it wasn't a shadow delete, as I can see it missing now.
I guess an official reseller of Canaan deemed my post, which is pointing out a possible fire hazard to clients, as off-topic and needs to be deleted.


A reply of yours, quoted below, was deleted by a Bitcoin Forum moderator. Posts are most frequently deleted because they are off-topic, though they can also be deleted for other reasons. In the future, please avoid posting things that need to be deleted.

Quote
I noticed on both the Canaan website and Blokforge that the heat ranges have been lowered by 10 degrees Celsius.
It use to be 40, and now it is 30.
https://bitcointalk.org/index.php?topic=2616205.0
I didn't get an email about this, and this much of a change would put several miners and farms out of range for this.  Usually that would result in a recall or notification as the norm has been 40C for most miners up until now.

Unless it was a self-moderated topic, your post was deleted by -ck or frodocooper.

I agree that the deleting and modifying topics here at the hardware section has lately maybe been little too aggressive than needed.

[philipma1957]

Buysolar and I Are waiting on 841 delivery.

We will do a heat test as we run 95 f in the summer

That is 35 c

[Shazam!!!]

I don't know if it helps, but I've had my 841's running at 37°c, on warmer days in my area. They seemed ok with it, as I didn't see any relevant hardware errors, and the units were slightly warm to the touch. PSU's remained cool the whole time. I try not to run them "out of range", but had no choice.

[kano]

Wow, that is sad that they deleted my post.
...

"They" is a mod - no one else can delete posts in this thread except someone delete their own posts.

[NotFuzzyWarm]

In all fairness, the deleted posts about temp range change were in the Blokforge thread so not really on-point with the topic. Which leads to my reply on it that was also deleted.

On that... 1st I have to say that so far my 841's have been happy running in up to 93F (34C) ambient leading to chip temps from 88-90C. I see similar temps on the 721's and 741's I have.

However - 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.

Also hate to say it but my s9 batch-1 (no Vcore regulators) running in the same area, chip temps 99-102C only pulls 1250w...

[ccgllc]

Yeah, my reply was deleted as well.  My only rationalization was that it was on the BlokForge thread instead of something specific to Avalons - thus my slightly reworked post here.