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Author Topic: Swedish ASIC miner company kncminer.com  (Read 3041659 times)
opentoe
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June 21, 2014, 03:16:38 PM
 #35521

Get an iR temperature dot on that VRM and see how hot it really is. I'll guarantee you the bottom PCB's of those boards are already starting to turn brown from burn.

My Dad's Jupiter had a DIE die on him and KNC replaced it with a used board. We really didn't expect a new one anyway, and the bottom of the "new" PCB board was all brown from burning in. Long story short the replacement board worked and I made sure to tell him to try and keep it cool as possible. The VRMs were running so damn hot they physically burnt the board. Crazy that KNC would actually send that one back to replace a broken one. Cost $65 to send one little PCB back to Sweden, that's why we didn't ask for another one.

And where the heck is an open box??? Someone must have recorded one by now?

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samsonn25
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June 21, 2014, 03:16:51 PM
 #35522

There should be.  But only KNC can see it through their programming. And it depends if they want you to know or not.
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June 21, 2014, 03:18:11 PM
 #35523

Get an iR temperature dot on that VRM and see how hot it really is. I'll guarantee you the bottom PCB's of those boards are already starting to turn brown from burn.

My Dad's Jupiter had a DIE die on him and KNC replaced it with a used board. We really didn't expect a new one anyway, and the bottom of the "new" PCB board was all brown from burning in. Long story short the replacement board worked and I made sure to tell him to try and keep it cool as possible. The VRMs were running so damn hot they physically burnt the board. Crazy that KNC would actually send that one back to replace a broken one. Cost $65 to send one little PCB back to Sweden, that's why we didn't ask for another one.

And where the heck is an open box??? Someone must have recorded one by now?


Was your temp over 95?
Collider
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June 21, 2014, 03:19:06 PM
 #35524

Just ssh into the control unit and reattach the cgminer screen, then look for temperatures Wink

On the other hand, most silicon does fine at 124°C, so no worries about temps.
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June 21, 2014, 03:22:25 PM
 #35525

You are right. That is why those chips shown circled in red in the original post are not used for core temperature measurements.

What do you propose they are measuring way out there on the edge of the board?
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June 21, 2014, 03:26:06 PM
 #35526

Todo for KNC:

absolutely new design of the asic and controller board.

It could not be, that others squeezze from an 28nm chip 750 Gh/s and knc only 660 Gh/s on 20nm Chip. I guess batch 4 will based also on 20nm chip but new bord-design.


each time you send a transaction don't forget to use a new address, each time you receive one also!
samsonn25
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June 21, 2014, 03:28:56 PM
 #35527

 But for longevity and life span under 60 degrees is highly recommended.
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June 21, 2014, 03:29:49 PM
 #35528

Can you please explain, whether or not is a temp sensor inside the core chipset?
There is no temperature sensor in the chips. The black components I've pointed out are used to give a rough indication of how hot the chips are. If you see my last post, it shows where this data is displayed in the interface.

This temperature component was closer to the chips on Jupiter, but much further away on Neptune boards. I've already explained why I think this was done by knc, but people can make up their own mind if they think differently.

I can't wait until someone with a thermal imaging camera gets one of these rigs and we get to see some REAL core temperatures  Tongue


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samsonn25
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June 21, 2014, 03:30:28 PM
 #35529

You are right. That is why those chips shown circled in red in the original post are not used for core temperature measurements.

What do you propose they are measuring way out there on the edge of the board?

To move the sensor closer to where the chip is at.  Lol
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June 21, 2014, 03:31:22 PM
 #35530

fuck
this neptune is crap
high temp on vrms

looking job
Tigggger
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June 21, 2014, 03:41:20 PM
 #35531

Just so it's clear - the black components you very clearly see here:

<snip>

EQUALS

The numbers you see next to the words "Temp":

<snip>

These components are about 2 to 3 inches away from the chip and the temperature reading is 58C  Shocked

Can you even imagine how hot that chip is in it's core?

That far away from the chip, the readings are almost useless.

But as I said, it was done by design. KNC hiding their shitty engineering.

I think you are only partly right.

In the jupiters the temperatures listed in that screenshot are the VRM temps, note that there are 8 seperate and different readings.

The temperatures listed in this screen are the ones from the sensor nowhere near the chip


xhomerx10
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June 21, 2014, 05:03:47 PM
 #35532

Look at those temperatures  Shocked

I said that the temp monitoring components were far away from the chip because KNC probably knew there would be overheating issues.

https://bitcointalk.org/index.php?topic=170332.msg7181832;topicseen#msg7181832

Anyone who shot me down when I said that, please feel free to eat your words!  Tongue

 lol
Comes with a side of relish.

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June 21, 2014, 05:04:43 PM
 #35533

fuck
this neptune is crap
high temp on vrms

 Is there any way to use ram coolers on them or are they covered?

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June 21, 2014, 05:11:48 PM
 #35534

Day of Reckining 2: Neptune edition Cheesy


 That's the best depiction of KNC and the ineptune ever!

s1gs3gv
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June 21, 2014, 05:18:01 PM
 #35535

Maximum operating temperature of the BMR46x series is 125 C.

http://archive.ericsson.net/service/internet/picov/get?DocNo=28701-EN/LZT146435&Lang=EN&HighestFree=Y

Elenelen, when you get a chance could you please read the numbers on the two black 8 pin packages near the side of the board and post them here ?
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June 21, 2014, 05:20:38 PM
 #35536

You are right. That is why those chips shown circled in red in the original post are not used for core temperature measurements.

What do you propose they are measuring way out there on the edge of the board?

What makes you think they are temperature sensors ? And why would there be 2 ? Let me guess … they are measuring each others temperature ? LOL

Lets get a read on the part number on the chip before we speculate further.
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June 21, 2014, 05:23:05 PM
 #35537

I had checked it in the past, they are temp sensors.

VRMs of Ericsson, say 125C as max but they shut down way before, at 100C.

I had blown at least 3-4 of them because of overheat.

Nowhere close to 125C as mentioned by the manufacturer.

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crashoveride54902
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June 21, 2014, 05:29:40 PM
Last edit: June 21, 2014, 06:18:20 PM by crashoveride54902
 #35538

i urge all neptune miners to not use the grey thermal pad n metal thing on top...i'm willing to guess that this will fry out your vrms way quicker...i left that grey pad on my nov. mods and oc'd it and the smd caps are now almost black...so imagine what this will do to your unit with even higher power vrms and heat...just a warning to ya'll

Take my warning as just that...upto you to figure out what is best for your unit Smiley

Dreams of cyprto solving everything is slowly slipping away...Replaced by scams/hacks Sad
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June 21, 2014, 05:34:51 PM
Last edit: June 21, 2014, 05:49:55 PM by Phoenix1969
 #35539

i urge all neptune miners to not use the grey thermal pad n metal thing on top...i'm willing to guess that this will fry out your vrms way quicker...i left that grey pad on my nov. mods and oc'd it and the smd caps are now almost black...so imagine what this will do to your unit with even higher power vrms and heat...just a warning to ya'll
I concur.... and remember same. those things act like blankets
It may be best to remove every one of them, and re-attach the plate so it DOES contact ALL VRM's with paste
Die-electric compound on all the pci connections may save you trouble as well. http://www.amazon.com/Permatex-22058-Dielectric-Tune-Up-Grease/dp/B000AL8VD2/ref=sr_1_1?ie=UTF8&qid=1403372942&sr=8-1&keywords=dielectric+compound


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s1gs3gv
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June 21, 2014, 05:46:12 PM
Last edit: June 21, 2014, 05:59:37 PM by s1gs3gv
 #35540

Here is a datasheet for a typical remote diode temperature management/fan control IC.

http://www.ti.com/lit/ds/symlink/lm96063.pdf

Note: "The LM96063 is remote diode temperature sensors with integrated fan control that includes remote diode sensing. The LM96063 accurately measures: (1) its own temperature and (2) the temperature of a diode- connected transistor, such as a 2N3904, or a thermal diode commonly found on Computer Processors, Graphics Processor Units (GPU) and other ASIC's."

These type of devices typically integrate with an on die thermal diode.

On the issue of BRM46x thermal design constraints, the spec says 125 C. Not 100 C, not 105 C. Looking at the data sheet, it looks like the device temperature is reported via the PMBus and may also be subject to configuration via a configuration file:

"This product is designed with a digital control circuit. The control circuit uses a configuration file which determines the functionality and performance of the product. The Electrical Specification table shows parameter values of functionality and performance with the default configuration file, unless otherwise specified. The default configuration file is designed to fit most application needs with focus on high efficiency. If different characteristics are required it is possible to change the configuration file to optimize certain performance characteristics. Note that current sharing operation requires changed configuration file. See application notes AN307 for further information."

Is anyone having problems with Neptune's shutting down due to thermal issues or is this yet more FUD being spread by haters and envious ne'er do wells towards KNC ?



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