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Author Topic: Pair of s-9s now running photos are up.  (Read 7196 times)
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June 15, 2016, 03:08:51 AM
 #21

I guess with these high temps we can assume that the fans are as loud or even louder than the S7s

loud as the s-7  and I have one unit that squeals like a stuck pig.

I know there is a fix for that if anyone had a squealing s-7 and wants to post the fix please do so.


my low tech solution to squealing s7 was to find out that fans screws to machine were over-tightened to the point of deforming fan's case.
i eased up one screw at the time starting from the closest to the point where I saw distortion. Half a turn-and it was OK-no squealing.
On one other machine this only helped a bit (partially), but after a day or two squealing went completely away anyway.
I guess that some part just got grinded or something.
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June 15, 2016, 03:25:01 AM
 #22

I'm confused.  Now they are giving us two temp readings.  In the past, for the S7 and others have we just been seeing the pcb temp (labeled: Temp).
Then why now they showing us the chip temp.  Why is that important now?  Poor design?
My pcb temps are running 56, 56, 59 at 625M.  On any other Antminer I would say there is plenty of room for some over-clocking.  Or in this case to move to the default 650M. (EDIT)
Chip temps are 87, 86, 91.  Are these temps higher than an S7 with the above pcb temps?  In other words is there more of variance on this miner than the older ones.  Where we can burn out a chip before the pcb gets to 80C.  That's still the safety shutdown temp. I believe.


Still confused.
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June 15, 2016, 03:46:03 AM
 #23

Damn that's sweet stuff.  Always fun reading up on the solar array you have going Smiley

I would agree  very cool to see 2 S9's connected the the array.   I like the loft how does it do with dust out of curiosity?
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June 15, 2016, 04:04:09 AM
 #24

I'm confused.  Now they are giving us two temp readings.  In the past, for the S7 and others have we just been seeing the pcb temp (labeled: Temp).
Then why now they showing us the chip temp.  Why is that important now?  Poor design?
My pcb temps are running 56, 56, 59 at 625M.  On any other Antminer I would say there is plenty of room for some over-clocking.  Or in this case to move to the default 650M. (EDIT)
Chip temps are 87, 86, 91.  Are these temps higher than an S7 with the above pcb temps?  In other words is there more of variance on this miner than the older ones.  Where we can burn out a chip before the pcb gets to 80C.  That's still the safety shutdown temp. I believe.


Still confused.

when the pcb hit 80c it should shut down


There is zero info on chip and what is bad.

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June 15, 2016, 11:37:50 AM
 #25

Phil do you have overnight numbers for the miner ?
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June 15, 2016, 11:43:01 AM
 #26

Yes  this is for 2 miners at freq 625 fans on 70%.


almost at 28th  with 625 freq




3 blocks so far.  A long way to go for roi


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June 15, 2016, 05:05:02 PM
 #27

I'm confused.  Now they are giving us two temp readings.  In the past, for the S7 and others have we just been seeing the pcb temp (labeled: Temp).
Then why now they showing us the chip temp.  Why is that important now?  Poor design?
My pcb temps are running 56, 56, 59 at 625M.  On any other Antminer I would say there is plenty of room for some over-clocking.  Or in this case to move to the default 650M. (EDIT)
Chip temps are 87, 86, 91.  Are these temps higher than an S7 with the above pcb temps?  In other words is there more of variance on this miner than the older ones.  Where we can burn out a chip before the pcb gets to 80C.  That's still the safety shutdown temp. I believe.
Inquiring minds want to know.

PCB temps are useless...just a cheap way to guesstimate what the die temps would be. My guess would be that with more real-estate afforded by 14/16nm it became worth it it put temps sensors on the dies, and the fact that chips at these node levels are more sensitive to high temps. Anything over 90c continuous on die temps will shorten the life of the chip. I would be concerned if they are running over 80c.

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June 15, 2016, 05:21:43 PM
 #28

I'm confused.  Now they are giving us two temp readings.  In the past, for the S7 and others have we just been seeing the pcb temp (labeled: Temp).
Then why now they showing us the chip temp.  Why is that important now?  Poor design?
My pcb temps are running 56, 56, 59 at 625M.  On any other Antminer I would say there is plenty of room for some over-clocking.  Or in this case to move to the default 650M. (EDIT)
Chip temps are 87, 86, 91.  Are these temps higher than an S7 with the above pcb temps?  In other words is there more of variance on this miner than the older ones.  Where we can burn out a chip before the pcb gets to 80C.  That's still the safety shutdown temp. I believe.
Inquiring minds want to know.

PCB temps are useless...just a cheap way to guesstimate what the die temps would be. My guess would be that with more real-estate afforded by 14/16nm it became worth it it put temps sensors on the dies, and the fact that chips at these node levels are more sensitive to high temps. Anything over 90c continuous on die temps will shorten the life of the chip. I would be concerned if they are running over 80c.

if 80c on the chips is bad then the s-9 should be clocked at 575 vs 650 as to go to 79c will not be easy in rooms without ac.

i went to 625 but may indeed go to 600.

mean while i fixed the mad whistle


https://bitcointalk.org/index.php?topic=1493601.msg15223731#msg15223731
https://bitcointalk.org/index.php?topic=1493601.msg15223315#msg15223315

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June 15, 2016, 07:14:14 PM
 #29

I'm confused.  Now they are giving us two temp readings.  In the past, for the S7 and others have we just been seeing the pcb temp (labeled: Temp).
Then why now they showing us the chip temp.  Why is that important now?  Poor design?
My pcb temps are running 56, 56, 59 at 625M.  On any other Antminer I would say there is plenty of room for some over-clocking.  Or in this case to move to the default 650M. (EDIT)
Chip temps are 87, 86, 91.  Are these temps higher than an S7 with the above pcb temps?  In other words is there more of variance on this miner than the older ones.  Where we can burn out a chip before the pcb gets to 80C.  That's still the safety shutdown temp. I believe.
Inquiring minds want to know.

PCB temps are useless...just a cheap way to guesstimate what the die temps would be. My guess would be that with more real-estate afforded by 14/16nm it became worth it it put temps sensors on the dies, and the fact that chips at these node levels are more sensitive to high temps. Anything over 90c continuous on die temps will shorten the life of the chip. I would be concerned if they are running over 80c.

if 80c on the chips is bad then the s-9 should be clocked at 575 vs 650 as to go to 79c will not be easy in rooms without ac.

i went to 625 but may indeed go to 600.

mean while i fixed the mad whistle


https://bitcointalk.org/index.php?topic=1493601.msg15223731#msg15223731
https://bitcointalk.org/index.php?topic=1493601.msg15223315#msg15223315


I let mine run overnight at 650M when it's especially cool in the mine.  Even then my die temps were in the upper 80's, with PCB temps in the mid to low 50's.

But when you say anything over 90 will shorten the die's life, are you speaking generally about asic chips?  Or specifically about asics designed to mine crypto?  The reason I ask is that these chips do not need to last 3-4 years.  Even with the S9 being by far the leader right now, I can't imagine it being profitable 18 months from now.
I would not want to keep a miner throttled back 10% below "manufacturer's default" speed just so the chips will last 3-4 years.  I just need them to last about 18 months at the most.  Even that would be the longest life cycle for a miner since asics.  And I want to suck the life out of them for those 18 months.  No sense leaving coin on the table.
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June 15, 2016, 07:53:26 PM
 #30

I'll leave other to post pics. Got mine today and so far am - happy - with it but...
A. is so far averaging just over 13THs
B. A thermal design issue raises it head with these. The middle card and the one with long finned heatsinks facing the case wall run well over 4.3-.5 THs each. They report chip temps of around 90C. The one with the short fin topsinks facing the case is giving a bit over 3THs and reports the chip temp as banging around 99-100C. The air coming out of that card is also substantially warmer than the other 2. Will measure temps tomorrow sometime.

The root problem is that the short sinks are presenting a much high airflow resistance because the flow channel is restricted by them and the case wall. If somehow move the cards over a smig, hell even 1/8" might do it, then airflow should remarkably improve.

yes short term I down clocked from 650 to 625.

But UPS was late.
I had to dissemble the avalon6s from the array.
My sprained ankle from 65 days ago still hurts. ( bitch to be 59 it would have healed in under 10 days when I was 25-30)
The mining gear is in a loft with a ladder.

First time I turned them on I climbed down the ladder knowing they were mining for bitmaintech. So we went to the pc to check them and  setup kano.is

temps were very high   chips in the 90's






only 2 machines and a large loft  I was supposed to point miners in the direction in this photo
about 70 feet and an up draft fan in the center


Baller alert , you have one of those EGO eclectic mowers how do you like it ?


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June 15, 2016, 08:36:59 PM
 #31

Really nice Smiley put them on a colder place.

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June 15, 2016, 09:16:20 PM
 #32

afaik, chips max temp is 125 deg C then it starts to fail.

well thats for s7 chip though but i'd assume should be the same.

i think other components will fail before asic chip.

like i said, below 75C pcb temp should be pretty safe.

keep it cool Wink

4.2 Recommended Operation Conditions

TOPT Operation Temperature  125 ℃ (MAX)

https://cnshop.bitmain.com/files/download/BM1385_Datasheet_v2.0.pdf

bm1384 & bm 1385 pretty close, same value.

i noticed, pcb temp is roughly 30 deg C lower than chip temp so that can be used as a guesstimate imo.

so the built in 80 deg c cut off (pcb) +30 c (guesstimate) = 110 c on chip so should still be ok.

just my 2 cents.

philip, some screenies pls.

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June 15, 2016, 10:08:03 PM
 #33

afaik, chips max temp is 125 deg C then it starts to fail.

well thats for s7 chip though but i'd assume should be the same.

i think other components will fail before asic chip.

like i said, below 75C pcb temp should be pretty safe.

keep it cool Wink

4.2 Recommended Operation Conditions

TOPT Operation Temperature  125 ℃ (MAX)

https://cnshop.bitmain.com/files/download/BM1385_Datasheet_v2.0.pdf

bm1384 & bm 1385 pretty close, same value.

i noticed, pcb temp is roughly 30 deg C lower than chip temp so that can be used as a guesstimate imo.

so the built in 80 deg c cut off (pcb) +30 c (guesstimate) = 110 c on chip so should still be ok.

just my 2 cents.

philip, some screenies pls.


  sorry real world is in the way.

doing a full kitchen reno gutting to the studs.

won't post as much for next 3 weeks.

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I see BTC as the super highway and alt coins as taxis and trucks needed to move transactions.
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June 15, 2016, 10:35:05 PM
 #34

I'm confused.  Now they are giving us two temp readings.  In the past, for the S7 and others have we just been seeing the pcb temp (labeled: Temp).
Then why now they showing us the chip temp.  Why is that important now?  Poor design?
My pcb temps are running 56, 56, 59 at 625M.  On any other Antminer I would say there is plenty of room for some over-clocking.  Or in this case to move to the default 650M. (EDIT)
Chip temps are 87, 86, 91.  Are these temps higher than an S7 with the above pcb temps?  In other words is there more of variance on this miner than the older ones.  Where we can burn out a chip before the pcb gets to 80C.  That's still the safety shutdown temp. I believe.
Inquiring minds want to know.

PCB temps are useless...just a cheap way to guesstimate what the die temps would be. My guess would be that with more real-estate afforded by 14/16nm it became worth it it put temps sensors on the dies, and the fact that chips at these node levels are more sensitive to high temps. Anything over 90c continuous on die temps will shorten the life of the chip. I would be concerned if they are running over 80c.

if 80c on the chips is bad then the s-9 should be clocked at 575 vs 650 as to go to 79c will not be easy in rooms without ac.

i went to 625 but may indeed go to 600.

mean while i fixed the mad whistle


https://bitcointalk.org/index.php?topic=1493601.msg15223731#msg15223731
https://bitcointalk.org/index.php?topic=1493601.msg15223315#msg15223315


I take it that the filter doesn't block that much air flow?  I'm going to have to pick some of this up for my S7 that still whistles once in a while.

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June 15, 2016, 10:46:28 PM
 #35

<snip>

I take it that the filter doesn't block that much air flow?  I'm going to have to pick some of this up for my S7 that still whistles once in a while.
As long as the filter material has fairly large open cells and you knock the dust off every so often it makes very little if any difference in temps even on my s9.

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June 15, 2016, 11:43:49 PM
 #36

<snip>

I take it that the filter doesn't block that much air flow?  I'm going to have to pick some of this up for my S7 that still whistles once in a while.
As long as the filter material has fairly large open cells and you knock the dust off every so often it makes very little if any difference in temps even on my s9.

yes exactly that  the filter is very lite duty.

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June 16, 2016, 12:44:28 AM
 #37

Looking good Phil.

I would highly suggest taking that PSU out of the cardboard box and using the stock fan packs to make sure it's getting adequate cooling.  I can't imagine the noise of it is a concern out there, especially with 2x S9's howling right beside it. 

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June 16, 2016, 01:24:59 AM
 #38

Looking good Phil.

I would highly suggest taking that PSU out of the cardboard box and using the stock fan packs to make sure it's getting adequate cooling.  I can't imagine the noise of it is a concern out there, especially with 2x S9's howling right beside it. 

yeah you would be correct if I was using it.

I will get to it since I will be using it with the next two s-9's


i am using the dual board 4000 watters pulling  2800 watts ac to do 27th.

Waiting on news for my batch 2 units.

I am  hoping they ship soon.  like tonight vs the 20th.

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June 16, 2016, 01:44:51 AM
 #39

So far, even having to down clock my b1 (now in my rather warm basement) to 600MHz to keep temps reasonable still liking them and looking forward to my b3.

Now only question is what to do with the s7's I have piling up as I take them off line to stay within my available power budgets.  Got 5x 'spares' so far....  Undecided

@ Sidehack - got power available for a couple s7's say directly pointed at your wallet (to pay for the electric) for you to play with optimizing?

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June 16, 2016, 02:01:06 AM
 #40

So far, even having to down clock my b1 (now in my rather warm basement) to 600MHz to keep temps reasonable still liking them and looking forward to my b3.

Now only question is what to do with the s7's I have piling up as I take them off line to stay within my available power budgets.  Got 5x 'spares' so far....  Undecided

@ Sidehack - got power available for a couple s7's say directly pointed at your wallet (to pay for the electric) for you to play with optimizing?

I would love to see if an empty s-7 could fit two boards and link four board to the s-9 controller.


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I see BTC as the super highway and alt coins as taxis and trucks needed to move transactions.
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