Swedish ASIC miner company kncminer.com

[user27]

Scratch that, yea, the basic LM75 does have the band gap sensor on-board. I was looking at the A version as I said in my post.

How about a schematic?

And where on this "A" rev schematic does your proposed external sensor connect?

As above there is a "band gap sensor on-board" so no external sensor needed for LM75.

I still think the temps on the advanced page are from the die itself not from a sensor elsewhere on the board.

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[The Avenger]

I still think the temps on the advanced page are from the die itself not from a sensor elsewhere on the board.

As there is nothing "on the die" sensing temperature, the data from the LM75 is the only information available to give an indication of the asic core temperature. It's obviously not the actual real core temperature, as tolip's IR gun figures show, but the data on the status/advanced page is coming from the LM75 and not from any other source. Which is what I have been saying.

If you need any proof of this - carefully - put your finger on the LM75 and watch the temperature value on the web interface change.

[s1gs3gv]

One of them is an LM75, as I've told you a dozen times  

Don't mean to question your credibility Avenger as everyone knows that your posts are always fact based ~L)L~ but I would like independent confirmation of the device identity. For both of them.

If they are LM75 devices, then they are measuring the board temperature at their location and are not using a temperature diode on the ASIC. If they are some other chip, then they may be using a temperature diode on the ASIC chip.

Could someone please provide a nice close up showing these 2 devices ?

[tolip_wen]

One of them is an LM75, as I've told you a dozen times  

Don't mean to question your credibility Avenger as everyone knows that your posts are always fact based ~L)L~ but I would like independent confirmation of the device identity. For both of them.

If they are LM75 devices, then they are measuring the board temperature at their location and are not using a temperature diode on the ASIC. If they are some other chip, then they may be using a temperature diode on the ASIC chip.

Could someone please provide a nice close up showing these 2 devices ?

Just an FYI but It's _my_ credibility you have questioned.
I looked at the parts and reported here as asked.

I HAVE pics but will not provide to you.
Believe me or not, my day remains the same


YMMV

[dropt]

As above there is a "band gap sensor on-board" so no external sensor needed for LM75.

I still think the temps on the advanced page are from the die itself not from a sensor elsewhere on the board.

Yes, I misread your statement to imply that the basic LM75 had the onboard sensor, but the 'A' rev that you were looking at previously did have those provisions, and that the schematic you were posting was of this alleged 'A' rev.

[Phoenix1969]

There is no such analog sensor input on any of the lm75 revisions posted in the last couple of pages.

[jelin1984]

what we need these one?
lm75???

[dropt]

what we need these one?
lm75???

No.

[s1gs3gv]

Just an FYI but It's _my_ credibility you have questioned.

just a little touchy are we tulip ?

That now leaves me wondering why there are two LM75 devices adjacent to each other.

[smoothrunnings]

At the rate that Knc is going not shipping the batch 2 Neptune's yet it looks like they will owe me 3 or 4 Neptune's!

[RawDog]

At the rate that Knc is going not shipping the batch 2 Neptune's yet it looks like they will owe me 3 or 4 Neptune's!

This is shocking!  Do they think that because they shipped at least one Neptune by Q1/Q2 that they have met their timeline obligation?  That is totally absurd.  'Ontime and overspec' is their claim with this performance?  What if they take another 12 months to deliver the remaining Neptunes?  They still claim to meet their timeline?  I've got a feeling customers aren't going to stand by forever.  Probably time for serious action.

[dropt]

That now leaves me wondering why there are two LM75 devices adjacent to each other.

There aren't, and tolip_wen already told you what the other was.

Please forgive me for just answering the fucking question that was asked.

One is an 
LM75
(closer to PCIe)

other is
24C32WP
k348k

It's the i2c EEprom

YMMV

[s1gs3gv]

Well excuse me for not reading every post in this thread before I ask a question. Anybody with half a brain could figure out that if I had seen Tulip's comment I wouldn't have asked the question.

You Neptune owners are a touchy bad tempered lot. Can't imagine why. Better luck next time fellas ~L)L~

So, in conclusion, if it is a LM75 then yes it is measuring the board temperature in its locale, not the on die ASIC temperature via a temperature diode on the ASIC. Is anybody having trouble with cooling fans not operating correctly ? Is anybody having trouble ROI'ing their Neptune ?

[crashoveride54902]

Thanks tolip.

And maybe you could give your opinion on the statement "Core temperature sensing is performed by circuits on the die"

The LM75 measures it own case temperature.
There _IS_ a die in there though.

The original statement may have originated by someone who was wordlexic.
Die(s)/PCB/cube whatever.

I don't rely on that temp for much of anything.
I ALWAYS use the hottest temp I can find for cooling decisions.

As I type...
67C on bottom of PCB directly below ASIC
61C reported by LM75

I IR gunned the PCB temp.
I could probbably find hotter but bottom of PCB's is inside my pentagon with trapped V8 bottle.
It's tight in there and the bottle is not a cooperative captive.
https://i.imgur.com/9T8lRc2.jpg


YMMV

wow tolip you really think outta the box when it comes to designing wc'in don't ya? Do you often have nightmares of leaks? or what it would look like if your whole setup failed all at once? boy i'm pretty sure there would be fireworks everywhere not hoping that happens to ya and i'm sure your extra extra careful...wc'in to expensive for me to play with...but it sounds like your one busy busy man tinkering around with all those jups n neps...i bet i'd be in nerd heaven if i had your workshop area to play with...probably wouldn't know what to do with myself hehe

[tolip_wen]

wow tolip you really think outta the box when it comes to designing wc'in don't ya? Do you often have nightmares of leaks? or what it would look like if your whole setup failed all at once? boy i'm pretty sure there would be fireworks everywhere not hoping that happens to ya and i'm sure your extra extra careful...wc'in to expensive for me to play with...but it sounds like your one busy busy man tinkering around with all those jups n neps...i bet i'd be in nerd heaven if i had your workshop area to play with...probably wouldn't know what to do with myself hehe

My 'workshop' is just a wire rack in my kitchen.
I live in a small 2 room shoe.

My main design goal for first stage with the Nep cooling was remote heat exchange.
Another main factor was low downtime.
I built the loop and modded a cube at a time while the other 4 hashed away.

It is very much a temporary prototyping environment.
The Hoopiter had a similar long transition into a neat case.
If they runnin no hurry.

No nightmares. the Nep system is just over 3L of H2O.

YMMV

[crashoveride54902]

wow tolip you really think outta the box when it comes to designing wc'in don't ya? Do you often have nightmares of leaks? or what it would look like if your whole setup failed all at once? boy i'm pretty sure there would be fireworks everywhere not hoping that happens to ya and i'm sure your extra extra careful...wc'in to expensive for me to play with...but it sounds like your one busy busy man tinkering around with all those jups n neps...i bet i'd be in nerd heaven if i had your workshop area to play with...probably wouldn't know what to do with myself hehe

My 'workshop' is just a wire rack in my kitchen.
I live in a small 2 room shoe.

My main design goal for first stage with the Nep cooling was remote heat exchange.
Another main factor was low downtime.
I built the loop and modded a cube at a time while the other 4 hashed away.

It is very much a temporary prototyping environment.
The Hoopiter had a similar long transition into a neat case.
If they runnin no hurry.

No nightmares. the Nep system is just over 3L of H2O.

YMMV

oh for some reason i just pictured a big room with wc'in tubes all over the place...my bad

[jelin1984]

Does anyone
Under volt Neptune
And run at 500 mhz

[smoothrunnings]

At the rate that Knc is going not shipping the batch 2 Neptune's yet it looks like they will owe me 3 or 4 Neptune's!

This is shocking!  Do they think that because they shipped at least one Neptune by Q1/Q2 that they have met their timeline obligation?  That is totally absurd.  'Ontime and overspec' is their claim with this performance?  What if they take another 12 months to deliver the remaining Neptunes?  They still claim to meet their timeline?  I've got a feeling customers aren't going to stand by forever.  Probably time for serious action.

Nah, I suspect they will have to either provide 6 or 12 Neptune's to batch 2 and something similar to Batch 3 (1&2) owners.

[The Avenger]

It amazes me to see some of you guys still have faith in KfC.

It's over 3 weeks since they tried to sweep under the carpet they ran out of chips. Plenty Batch 1 customers are still waiting. Not a single update for customers to let them know anything about this situation in over three weeks.

They fed everyone lies claiming they would continue shipping and the fact they had no chips was not a problem  

Anyone waiting for Batch 2 who thinks they will get a bonus for the wait really needs to think again You don't know how kfc operate if you think that.

It also seems they are taking 2+ weeks to RMA anything. No doubt, taking their time and looking for ways to blame the customer and not their hardware.

If they were some crappy ebay seller selling hairbrushes with led lights in the handle or some other cheap mass produced crap, it's the kind of customer service you'd expect.

But it's an appalling way to treat customers who paid $10,000 each (or more) for knc's hardware.

[RobFordWotWot]

Can these neptunes run solitaire though?