Pair of s-9s now running photos are up.

[NotFuzzyWarm]

or more. There's what, 21 sets of data cable connector pads? ... As I mentioned elsewhere, 2 s9 blades in a reused s7 case should make the thermal issue a moot point...

[1713943719]

1713943719

[1713943719]

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[1713943719]

1713943719

[philipma1957]

or more. There's what, 21 sets of data cable connector pads? ... As I mentioned elsewhere, 2 s9 blades in a reused s7 case should make the thermal issue a moot point...

Save all your firmware.

My batch 1 and batch 2 s-7s were able to do,six units per controller . I never up graded firm ware on them as I,did not want to lose the feature.

Best case is the current s-9 batch one can do the four  boards. And it. An easy fix.

It also cuts down on Ethernet cables as 4 boards to 1 controller means 12 boards need 3 Ethernet conections.

Not four Ethernet connections.

[generalt]

I had a S5+ that had two boards go bad.  I thought hey let me take those two boards out and the air flow should be better.  I was wrong.  For some reason having only one board in the chassis was worse for the cooling.  If I put two boards in there though temperatures for the working board dropped back down to normal.  I don't know what the temp for the second board would've been if it was hashing as well.

[Brob12321]

Wow nice S9's hopefully the price of them doesn't drop by half in a month or so lol but looks like you made the right gamble with the price of bitcoin skyrocketing.

[Swimmer63]

Well between the S9 delivery yesterday and the price going through the roof again today - In a week's time I have gone from squeaking out earnings of $40/day to just shy of $100 today.  Too bad mining is dead.

[notlist3d]

Wow nice S9's hopefully the price of them doesn't drop by half in a month or so lol but looks like you made the right gamble with the price of bitcoin skyrocketing.

Keep in mind on price right now your getting pre-having mining which is a big thing.   It is before block reward so the miners will make more now vs after having.   So a higher price now would make sense.

We have no idea what price will be after having but I would imagine cheaper due to not mining these day's before having, which again is huge to have in my eyes.   I would guess price would reflect after... but how much I have no idea.  But it is a tradeoff as you did not get the pre-having mining if you wait for a lower price.

[Swimmer63]

Wow nice S9's hopefully the price of them doesn't drop by half in a month or so lol but looks like you made the right gamble with the price of bitcoin skyrocketing.

Keep in mind on price right now your getting pre-having mining which is a big thing.   It is before block reward so the miners will make more now vs after having.   So a higher price now would make sense.

We have no idea what price will be after having but I would imagine cheaper due to not mining these day's before having, which again is huge to have in my eyes.   I would guess price would reflect after... but how much I have no idea.  But it is a tradeoff as you did not get the pre-having mining if you wait for a lower price.

Agree.  The question is, and what counter acts the theoretical price drop after halving, is demand for coin.  Before the run up the market took in the coins being mined and we have been at somewhat of an equilibrium.  But that same demand for coins in 3 weeks can't be met.

[buysolar]

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 ?

Personally I love the EGO. It's perfect for small areas or if you have less than a half hour of mowing to do. No need for gas. The battery has lasted me 2 years now just starting my third year. The batteries for it cost about $100. I never needed to get an extra battery for longer run time, but I'm sure I'll need to replace it eventually. 

[citronick]

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

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.

thanks ysl - i am a bit more assured now that 600-625mhz will be safe for now - this unit will transit to a DC so I just want to ensure that this can live in my warehouse for a few weeks.

[philipma1957]

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

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.

thanks ysl - i am a bit more assured now that 600-625mhz will be safe for now - this unit will transit to a DC so I just want to ensure that this can live in my warehouse for a few weeks.

buysolar just sent  a pm that one unit needed to go to  freq 600  as the temps on it had crept up to

75c and 105c.

 now we got better numbers  65  95

these puppies need fans over 4000 rpm  we are at 70% manual 4100 rpm.

still need to tweak a bit.

the ambient temps are 88f  or say 32c  so this unit may be a 600 freq in the summer then 650 freq once the fall comes.

I am not going to provide AC   so ambient temps in the summer in NJ will be over 95f some of the time.

I can tell this location will be 4 units until the fall comes.

Still we will be pushing 50th at 5000 watts  for June, July, August, Sept.

It is not so bad as we will build up credits for the fall winter with the power company.

[citronick]

I have getting double digit hw errors, at stock 650mhz@13.4TH, with 100% fan to keep the chip temp just below 100c.

I tested lower clocks and 525 mhz seems to have hit the sweet spot, at 11.3TH, 59-64c PCB temps, 88-94c chip temp.

The jet engine sound is also further reduced to bearable level - I have yet to apply the filter hack idea from Philip but I temporary use a pantyhose to filter dust.

[E]

Batch 1 S9 / Stock Clock / 100% Fan / 20C Ambient / 20hr runtime:

[spazzdla]

This thread excites me way more than it should...

[philipma1957]

20c is cold are you in an ac'd it room/data center?

Batch 1 S9 / Stock Clock / 100% Fan / 20C Ambient / 20hr runtime:

[RadekG]

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.

Maybe I will do some clarification here.

1) All previous chips until now are not able to read chip temperature because of missing temperature probe on chip die.
2) temp reading was done through temp probe at PCB, far away enough from chips to get much lower readings.
3) temp of PCB is extremely inacurate because it can't discover poor heatsink contact and chip overheat. PCB temp vs Chip temp accuracy is extremely affected by frequency (total heat generated) and fan speed. Low freq and low fan speed keeps PCB temp closer to chip temps.
4) generally, all chips follow the same temperature characteristic, so if datasheet says it is safe to operate the chip at 125C, it is true, because it is common to all other similar chips.
5) a lot of previous miners (S5 is the winner) suffered from high power density and poor heatsink contact, so there was big number of failed S5 due to overheating
6) knowing chip die temperature is the key to operate chip safely. Keeping the chip within safe margin keeps the chip running virtually indefinitely.
7) since antminer S5, all chips are able to withstand temperatures about 200C under load (under load is very importatnt). It is from my own experience when chips were running and due to overheat they desoldered themselves while soldering temperature is about 200C. Resoldering chips back was enough to fix the board. BTW: My Radeon 5970 GPU was working at 150C without destruction.


TLDR:

So, reading die temperature is the key to operate chips within safe region. Answers to your questions:

1) why so important: let us know key safety information
2) poor design: Yes, until now. With chip temp reading miners wouldn't fail.
3) are S7 temps lower/higher than S9: With the same PCB readings your chip temps will vary about +-10 degrees on both S7 or S9 miners. This is because PCB temperature is far away from chips and it is also cooled by fan. Depends on fan and frequency speeds.
4) OC suggestion: Keep your chips temp below 125C under any circumstances. Lower is better. From my experience chips can work even higher, but PCB componnents are aging and efficiency drops.

Hope it helped also others

[Swimmer63]

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.

Maybe I will do some clarification here.

1) All previous chips until now are not able to read chip temperature because of missing temperature probe on chip die.
2) temp reading was done through temp probe at PCB, far away enough from chips to get much lower readings.
3) temp of PCB is extremely inacurate because it can't discover poor heatsink contact and chip overheat. PCB temp vs Chip temp accuracy is extremely affected by frequency (total heat generated) and fan speed. Low freq and low fan speed keeps PCB temp closer to chip temps.
4) generally, all chips follow the same temperature characteristic, so if datasheet says it is safe to operate the chip at 125C, it is true, because it is common to all other similar chips.
5) a lot of previous miners (S5 is the winner) suffered from high power density and poor heatsink contact, so there was big number of failed S5 due to overheating
6) knowing chip die temperature is the key to operate chip safely. Keeping the chip within safe margin keeps the chip running virtually indefinitely.
7) since antminer S5, all chips are able to withstand temperatures about 200C under load (under load is very importatnt). It is from my own experience when chips were running and due to overheat they desoldered themselves while soldering temperature is about 200C. Resoldering chips back was enough to fix the board. BTW: My Radeon 5970 GPU was working at 150C without destruction.


TLDR:

So, reading die temperature is the key to operate chips within safe region. Answers to your questions:

1) why so important: let us know key safety information
2) poor design: Yes, until now. With chip temp reading miners wouldn't fail.
3) are S7 temps lower/higher than S9: With the same PCB readings your chip temps will vary about +-10 degrees on both S7 or S9 miners. This is because PCB temperature is far away from chips and it is also cooled by fan. Depends on fan and frequency speeds.
4) OC suggestion: Keep your chips temp below 125C under any circumstances. Lower is better. From my experience chips can work even higher, but PCB componnents are aging and efficiency drops.

Hope it helped also others

Now there's an honest to god reply. Thank you sir. You at the very least sound like you know of what you speak. And I like your numbers. Appreciated!

[philipma1957]

guys -- there is critical notice on DAO being hacked big time.

https://forum.daohub.org/t/the-dao-is-under-attack/5171

will stopping miners help reduce the impact of hack?

deleted this post does not belong here.


I sold all my dao last week as I had a bad feeling about them.  Sad thing is this is going to hurt  ETH coin.

[E]

20c is cold are you in an ac'd it room/data center?

Just cooler weather here. The last 24hours were 25-27C and the results look the same, other than temps a few degrees higher. Blade 4 accounts for most of the HW errors; it would be nice to be able to clock the blades differently. Dunno if that works with their work generation/collection architecture.



(Batch 1 S9 / DPS-2000BB PSU / 8 Jun Firmware / 650MHz / 100% Fan / 25-27C Ambient / 24hr runtime)

[philipma1957]

20c is cold are you in an ac'd it room/data center?

Just cooler weather here. The last 24hours were 25-27C and the results look the same, other than temps a few degrees higher. Blade 4 accounts for most of the HW errors; it would be nice to be able to clock the blades differently. Dunno if that works with their work generation/collection architecture.



(Batch 1 S9 / DPS-2000BB PSU / 8 Jun Firmware / 650MHz / 100% Fan / 25-27C Ambient / 24hr runtime)

so 13950/14000 =  0.9964   or 0.0036  and your errors are 0.0004  at freq 650

please humor me as you have a really well preforming machine  could you set it at  freq 643.75 vs 650?

I have seen s-7 and s-5 run at 0.0000 error rates with tiny underclock.  If you gear were to do this you may get 13950 hash with 0.0000 and save a tiny bit of power.  other then that your machine seems to be a top notch batch 1 machine.

[citronick]

guys -- there is critical notice on DAO being hacked big time.

https://forum.daohub.org/t/the-dao-is-under-attack/5171

will stopping miners help reduce the impact of hack?

deleted this post does not belong here.


I sold all my dao last week as I had a bad feeling about them.  Sad thing is this is going to hurt  ETH coin.

my bad phil, i posted on wrong group - its should been in our other thread.