Topic: Swedish ASIC miner company kncminer.com - page 362. (Read 3050076 times)

I had my team span out to all the UPS/FexeX ports and steal any boxes coming from KNC.

Anyone who? Only 1 Neptune is in the wild!

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 ?

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

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

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.

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.

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 ?

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

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

 lol
Comes with a side of relish.

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

fuck
this neptune is crap
high temp on vrms

To move the sensor closer to where the chip is at.  Lol

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 

 But for longevity and life span under 60 degrees is highly recommended.

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.

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

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

On the other hand, most silicon does fine at 124°C, so no worries about temps.

Was your temp over 95?