Swedish ASIC miner company kncminer.com

[Kuroth]

What what what???     

[The Avenger]

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  

500MH/s

lolololol!!

aka  the KNC bork bork bork eruptor!

[jeroenn13]

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  

500MH/s

lolololol!!

aka  the KNC bork bork bork eruptor!

LOL! Who created that deserves a reward.

PS:

[tolip_wen]

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?

[Its About Sharing]

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)

[soy]

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  

500MH/s

lolololol!!

aka  the KNC bork bork bork eruptor!

LOL! Who created that deserves a reward.

PS:

I like this company.  Please don't put "Mission Accomplished!" under the photo.

[Xialla]

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  

rooofl

[The Avenger]

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)

(pssst - it's a joke/irony/sarcasm that they haven't given us any updates about anything)

[Its About Sharing]

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)

(pssst - it's a joke/irony/sarcasm that they haven't given us any updates about anything)

ehheheh, the thought had crossed my mind. Anyway, hope they still got production running but if not then the problems are not isolated imo.

[soy]

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.

Users are adding fans.  Why not go with 12vdc fans that accept the 4 pin connector.  Put in a splitter before the 4 pin molex in.  Drive 12vdc fans from that external splitter.  When unplugging the miner leave the fans plugged in draining any potential on the 12v line in the power supply.

[merv77]

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 * 0.875V * 80% = 224W per board or 896W total.  Not even sure the chip can handle that kind of power but even if it could the DC regulators can't provide more than that.  

Before buying a second PSU and a 1600W "bonus" one 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 2400W+ of power supplies for each rig is going to do absolutely nothing expect waste money.

Sorry I should have been more specific..
it's electrical supply is 240 volt and they are measurements at the wall taken with a kill-a-watt meter. I haven't subtracted the watts used by the controller board or beaglebone which is only 22 watts at the wall.

I will do more long term tests in next couple days and post results.

[soy]

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.

Users are adding fans.  Why not go with 12vdc fans that accept the 4 pin connector.  Put in a splitter before the 4 pin molex in.  Drive 12vdc fans from that external splitter.  When unplugging the miner leave the fans plugged in draining any potential on the 12v line in the power supply.

Okay, any users who have had the blown caps: The miner had been running hours or days then shut down.  Was the power supply disconnected from the miner?  Did the miner capacitors explode when the plug was reinserted even tho the supply was switched off?

Having run previously for hours or days, the capacity for voltage memory of filter capacitors in the power supply would have been well established.

[DeathAndTaxes]

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 * 0.875V * 80% = 224W per board or 896W total.  Not even sure the chip can handle that kind of power but even if it could the DC regulators can't provide more than that. 

Before buying a second PSU and a 1600W "bonus" one 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 2400W+ of power supplies for each rig is going to do absolutely nothing expect waste money.

Sorry I should have been more specific..
it's electrical supply is 240 volt and they are measurements at the wall taken with a kill-a-watt meter.

What measurement?  You posted a bunch of nonsense not a measurement.

[aspeer]

It's amusing to see how many people in eligius have gotten jupiters( or other near 500GH/s) and struggled getting them to run well.... more funny is they seem to eventually get it leveled off through their own accord.

http://eligius.st/~wizkid057/newstats/topcontributors.php

[soy]

Or if one adds 12vdc fans to the exhaust of the box, powering with 12v out of the 4 pin molex, even unplugging everything then reassembling, plugging in the external 12vdc fans FIRST would kill any high voltage on that 12 volt rail.  This might not be much help if the power supply has multiple 12 volt rails in which case you'd have to make sure each rail had a fan on before getting attached to the miner.

[aspeer]

Or if one adds 12vdc fans to the exhaust of the box, powering with 12v out of the 4 pin molex, even unplugging everything then reassembling, plugging in the external 12vdc fans FIRST would kill any high voltage on that 12 volt rail.  This might not be much help if the power supply has multiple 12 volt rails in which case you'd have to make sure each rail had a fan on before getting attached to the miner.

or just pick up a $3 PSU tester with a screen instead of jumping the pins and let it drain the rails

[warhawk187]

Does anyone know why my Saturn stops hashing after 15 minutes???! This is ridiculous, it will hash @275-280 and then cgminer will start throwing FPGA errors and then either die completely or turn off a core and run @170ish Gh/s, but its never consistent. I've used 3 different PSU's and used all of the available firmware versions (mine came with 0.91).

What the F??! Anyone have any insight, or at least know how I can script cgminer via Putty to restart every 10 minutes? The case is off and when it hashes it hashes fine, but then, it just....dies. What gives?!?!

[aspeer]

Does anyone know why my Saturn stops hashing after 15 minutes???! This is ridiculous, it will hash @275-280 and then cgminer will start throwing FPGA errors and then either die completely or turn off a core and run @170ish Gh/s, but its never consistent. I've used 3 different PSU's and used all of the available firmware versions (mine came with 0.91).

What the F??! Anyone have any insight, or at least know how I can script cgminer via Putty to restart every 10 minutes? The case is off and when it hashes it hashes fine, but then, it just....dies. What gives?!?!

try putting .93 on it with the reboot fix

[DPoS]

Simple question: KNC are you speed testing each chip/board before placing it in a box?

that might be what the '2's and '1's stickers are on the boards.  No one figured that out yet


I will say again, that the boards should of kept the 8 VRMs.   Just because they weren't outputting current, somehow those extra chips were lowering the amps, heat and overall wattage of the miners

Only one board in my two jupiters have 8 VRMs

[soy]

Or if one adds 12vdc fans to the exhaust of the box, powering with 12v out of the 4 pin molex, even unplugging everything then reassembling, plugging in the external 12vdc fans FIRST would kill any high voltage on that 12 volt rail.  This might not be much help if the power supply has multiple 12 volt rails in which case you'd have to make sure each rail had a fan on before getting attached to the miner.

or just pick up a $3 PSU tester with a screen instead of jumping the pins and let it drain the rails

Yes, but lets get this exploding capacitor problem ended so they can start shipping again.  Does the board have MOVs on the 12v rail?  Not sure how effective at protecting tantalum given the tantalum sensitivity to high voltage and there's the power loss in the MOVs given that you'd want them conducting before the tantalum(s) fry and the closer the MOVs knee to the rail voltage the higher the leakage.  Would that be significant overall?  Probably not.  They'd need add the MOV to the board.  If it's multi-layver they can't just drill a pair of  holes willy-nilly but careful placement of holes drilled, copper surface of rails exposed with scraping, MOV soldered to 12v and ground is a lot of work.  Perhaps a connector, internal, with the MOV installed; unplug power ribbon, insert connector, plug power ribbon(s) into added connector might satisfy insurance people and protect the board.  An exploded capacitor isn't a fire tho it may give off gas that smells like smoke.