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Author Topic: Swedish ASIC miner company kncminer.com  (Read 3011676 times)
The Avenger
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October 11, 2013, 02:21:04 PM
 #14901

https://bitcointalk.org/index.php?topic=309391

"I am not The Avenger"
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October 11, 2013, 02:27:35 PM
 #14902


Have i just killed the Jupiter!?!

Just setup a new miner. Fired it up and recognized that one front-fan didnt work.

I didnt care cause without the case airflow should be OK. I started to change the setting via the webinterface and then the miner suddenly shut down.

I checked everything and found that the front-fan wasnt working cause a blade was STUCK!

So i "unstuck" it and fired the miner up again but NOTHING happens...........  Undecided

Whats going on???

UPDATE:

Fan is working normal again.

Situation is like this:

I start the miner and everything is OK, i can access the webinterface and edit things.

After pretty exactly 1 min the miner shuts down abruptly...  Undecided




this is PSU fault, i think!

i will try another PSU later

at the moment the miner runs with 3 cards

it doesnt matter which card i deactivate as soon as only 3 cards are applied the miner works

edit: i am using a seasonic 1050 gold


My guess is that (KnC) under specified on the power requirements by saying 860 watts was enough to power a Jupiter.
These Jupiters can easily use more than 1000 watts, probably more like 1200 watts.  Even if then can upgrade firmware to be more efficient, at moment each of the 4 cards on my Jupiter is drawing between 285 watts and 305 watts. In total that's 1150 watts to 1220 watts so in reality you would need minimum 1350 watt power supply, but I would go a 1500 - 1600 watt just to be safe.  Even if they state they could make it more efficient you still need the head room to be safe for testing out past, present and future firmwares.

At moment I can't run all cards at once as my 860 watt power supply over loads and shut down, but I will be more sure hopefully tomorrow after I get another 860 watt power supply to add with the existing one or I may buy a 1500 - 1600 watt to run Jupiter on its own if I can find one tomorrow. 

Again, this is my initial thoughts and I'll know more next couple days as I do more testing.  Also just guessing here but this may explain problems at the data center because if you can remember they bought hundreds of the 860 watt Corsair power supplies and they must be experiencing similar problems.

I don't think it's a huge problem, as all is required is more power and after power problems are worked out then they can focus on driver/software problems to fix hardware errors etc. It wouldn't make sense to do it the other way round.

I'm not sure if the amount of VRM's has anything to do with it, as my cards have 4 VRM's not 8.
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October 11, 2013, 02:29:41 PM
 #14903

Could the blown capacitors have been the result of users experimenting, trying to get higher hashrates by unplugging the power supply live from the miner then inserting the live plug?  They might not tell if they did.

Probably multiple workers in hosting.  If due to ease of access a worker(s) did the same and with the same result, could they have kept it secret so as not to look like an idiot(s) before the other workers?



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October 11, 2013, 02:29:57 PM
 #14904

Well, no wonder these things are overheating and bursting into flames!  Lol.  How could someone design this simple case and NOT include exhaust fans.  With all of those heatsink fans blowing air around and causing turbulence, I can't imagine the case is adequately exchanging air.
I understand it's an irony because the case and air at output is quite cold. You can turn off the intake fans and it still works well and stable.
But some people could misinterpret your words and take them literally.
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October 11, 2013, 02:30:22 PM
 #14905

In line with the general feeling in the topic towards KNC*




*No hard feelings guys, just trying to lighten up the mood a little bit  Wink

If this post helped you and you feel generous you know what to do: 1P9tXFy9bVgzrfPGeV7F8np26ZtFdCCWvz
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October 11, 2013, 02:31:34 PM
 #14906

A Jupiter can't use 1200W.  The DC regulators are only good for 320A max (and running them at max current 24/7/365 is a good way to destroy them).  So lets assume 80% duty cycle.  320A * 0.75V * 80% = ~200W per board or 800W total.   Throw in another <50W for fan & controller and you are looking at 850W peak.  Note I am not even sure the chip can use or handle that kind of power but even if it could the DC regulators on the board can't provide more than that.

Before buying a second PSU and a 1600W "bonus", have you spend $20 on a kill-a-watt to see what kind of power you are pulling from the wall? If you are pulling 500W from the wall then buying 850W + 1600W to supplement your existing 1600W to power the same sub 500W load is going to do absolutely nothing expect waste money.
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October 11, 2013, 02:32:05 PM
 #14907

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October 11, 2013, 02:33:54 PM
 #14908

I would imagine that if KNC is sure the problem is in the firmware, they are still running the assembly lines. IF that is the case, then they can probably ship the units quite quickly.

Any word on the production lines still going or ?

IAS

BTC = Black Swan.
BTC = Antifragile - "Some things benefit from shocks; they thrive and grow when exposed to volatility, randomness, disorder, and stressors and love adventure, risk, and uncertainty. Robust is not the opposite of fragile.
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October 11, 2013, 02:37:10 PM
 #14909

I would imagine that if KNC is sure the problem is in the firmware, they are still running the assembly lines. IF that is the case, then they can probably ship the units quite quickly.

Any word on the production lines still going or ?

IAS
All info we have is posted here:
https://bitcointalk.org/index.php?topic=170332.msg3319431#msg3319431

"I am not The Avenger"
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October 11, 2013, 02:38:16 PM
 #14910

it's really too bad you guys are having to go thru all this trial and error to make up for what KNC should've taken care of.

in HF's case, they hired the water cooling company itself to do heat simulations using all the Babyjet parts except for the actual chip itself.  they used a heating element to put out 250 W of nominal heat production to make sure the cooler could handle that first.  then they took the wattage up to 350 W of heat to make sure the cooler could handle that amount at what is meant to be an overclocked situation.  no problems according to the results from the water cooling company.  they may have even taken it higher but don't quote me on that.  i won't bother to tell you what hashing rate that took the chip up to b/c HF doesn't want to overpromise but it would knock your socks off.

Cypherdoc, just stop advertising here the HashFast devices. They have no advantage over KnC miners.
They can be late, can be faulty - you never know what can happen.
Do you wan't to make backpedalling then or delete all your posts like Bargraphics did?
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October 11, 2013, 02:41:47 PM
 #14911


Have i just killed the Jupiter!?!

Just setup a new miner. Fired it up and recognized that one front-fan didnt work.

I didnt care cause without the case airflow should be OK. I started to change the setting via the webinterface and then the miner suddenly shut down.

I checked everything and found that the front-fan wasnt working cause a blade was STUCK!

So i "unstuck" it and fired the miner up again but NOTHING happens...........  Undecided

Whats going on???

UPDATE:

Fan is working normal again.

Situation is like this:

I start the miner and everything is OK, i can access the webinterface and edit things.

After pretty exactly 1 min the miner shuts down abruptly...  Undecided




this is PSU fault, i think!

i will try another PSU later

at the moment the miner runs with 3 cards

it doesnt matter which card i deactivate as soon as only 3 cards are applied the miner works

edit: i am using a seasonic 1050 gold


My guess is that (KnC) under specified on the power requirements by saying 860 watts was enough to power a Jupiter.
These Jupiters can easily use more than 1000 watts, probably more like 1200 watts.  Even if then can upgrade firmware to be more efficient, at moment each of the 4 cards on my Jupiter is drawing between 285 watts and 305 watts. In total that's 1150 watts to 1220 watts so in reality you would need minimum 1350 watt power supply, but I would go a 1500 - 1600 watt just to be safe.  Even if they state they could make it more efficient you still need the head room to be safe for testing out past, present and future firmwares.

At moment I can't run all cards at once as my 860 watt power supply over loads and shut down, but I will be more sure hopefully tomorrow after I get another 860 watt power supply to add with the existing one or I may buy a 1500 - 1600 watt to run Jupiter on its own if I can find one tomorrow. 

Again, this is my initial thoughts and I'll know more next couple days as I do more testing.  Also just guessing here but this may explain problems at the data center because if you can remember they bought hundreds of the 860 watt Corsair power supplies and they must be experiencing similar problems.

I don't think it's a huge problem, as all is required is more power and after power problems are worked out then they can focus on driver/software problems to fix hardware errors etc. It wouldn't make sense to do it the other way round.

I'm not sure if the amount of VRM's has anything to do with it, as my cards have 4 VRM's not 8.


mine 2 jups drain 4.3 Ampere @ 220 V. that means 946 W in total ---> 473 W each.

i'm using 0.9.4

bertmode mod fw confirm that, since it says that my 4 asic slots' VMRs use in total 443 W. add to this other few Ws for beaglebone and such and you got it.




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October 11, 2013, 02:44:16 PM
 #14912

I have still have a day 2 low 400 order for hosting still not hashing. 11 days past the deadline. Very disappointed. 😞

Even if you get it hashing, doesn't mean you will get any BTC.  My hosted jupiter is running at 18 GH/s
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October 11, 2013, 02:44:52 PM
 #14913

What???

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October 11, 2013, 02:45:39 PM
 #14914

Could the blown capacitors have been the result of users experimenting, trying to get higher hashrates by unplugging the power supply live from the miner then inserting the live plug?  They might not tell if they did.

Probably multiple workers in hosting.  If due to ease of access a worker(s) did the same and with the same result, could they have kept it secret so as not to look like an idiot(s) before the other workers?

Like, those power supplies are designed to go into a computer, closed.  One doesn't have access to the plugs and even then the motherboard stays plugged in.

Or here's another consideration.  You can win a bet by showing how a capacitor has voltage memory, charge a cap, short it's contacts and bet that there is still voltage, take the short away, wait a few seconds, measure voltage.  

User shuts off the power supply, UNPLUGS the miner, say to take the top off - leaving the supply unplugged.  Remember, in its proper application, the motherboard stays plugged in.  So, the supply is unplugged and no current flow.  The voltage memory of the caps brings back a potential but no current flow there is no effective voltage control.  The voltage might get very high.  Plug the connector in and BAM.  We use to induce magnetic fields into slugs by building up charge in capacitors then discharging the caps thru coils around the slugs that then became permanent magnets.  That use to be one hell of a ZAP.



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October 11, 2013, 02:45:49 PM
 #14915

What what?

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October 11, 2013, 02:46:21 PM
 #14916

What what what?Huh??     Huh Roll Eyes Kiss Cry Kiss Undecided Lips sealed Grin

The Avenger
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October 11, 2013, 02:46:36 PM
 #14917

In line with the general feeling in the topic towards KNC*




*No hard feelings guys, just trying to lighten up the mood a little bit  Wink

500MH/s

lolololol!!

aka  the KNC bork bork bork eruptor!

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October 11, 2013, 02:49:16 PM
 #14918

In line with the general feeling in the topic towards KNC*




*No hard feelings guys, just trying to lighten up the mood a little bit  Wink

500MH/s

lolololol!!

aka  the KNC bork bork bork eruptor!

LOL! Who created that deserves a reward.

PS:
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October 11, 2013, 02:53:21 PM
 #14919


In my books, they have until the end of October to deliver all the October units. October 15th is again an implicit perversion of the "November 15th minus 1 month" assumption.


Who is the one perverting the facts?

"Delivery before Oct 15th."

https://www.kncminer.com/news/news-37

That is a direct quote of KnC on Sept 26th. not some perversion.

Even the 'shipped' by the 15th folks have accepted a new goalpost location.

KnCMiner in their OWN words,
"Delivery before Oct 15th."

Who is the one perverting the facts?


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October 11, 2013, 02:55:49 PM
 #14920

I would imagine that if KNC is sure the problem is in the firmware, they are still running the assembly lines. IF that is the case, then they can probably ship the units quite quickly.

Any word on the production lines still going or ?

IAS
All info we have is posted here:
https://bitcointalk.org/index.php?topic=170332.msg3319431#msg3319431

Thanks Avenger, had been following the thread closely but skipped the last page.

Upon further examination though, it is blank (the quote)Huh

BTC = Black Swan.
BTC = Antifragile - "Some things benefit from shocks; they thrive and grow when exposed to volatility, randomness, disorder, and stressors and love adventure, risk, and uncertainty. Robust is not the opposite of fragile.
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