The BBB has a place for the 20pin flavor of JTAG BTW.
Well if I had a spare BBB I would give it a whirl. Would the 20 pin one be of any use to you in this en-devour? |
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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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You've posted this poor-quality photo already in this thread. Incidentally, you are showing 4/5 of a single Neptune, not "4 KNC neptunes". 4/5 just about; also check out the power cables... surely it can't actually be running on that? You just want hits on your instagram or something? |
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...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.
That is indeed what you keep saying and you are still wrongScratch 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? |
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So you are saying the "Temperature" column here is coming from a circuit on the die, not an LM75 component on the board?
It is not either an LM75 ic OR a circuit on the die because it is BOTH of those things. The LM75A (if that's what's installed) is "a temperature-to-digital converter using an on-chip band gap temperature sensor"; all it does is convert "temperature-to-digital" such that it can be presented as illustrated above. How exactly do you think the LM75 would sense the temperature of the chip if it were not connected to a circuit on the die? u27 |
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"performed by circuits on the die" and "performed by a component on the board" are a bit different, no?
Yes, they are very different, and in this instance temperature sensing is "performed by circuits on the die". |
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Or do you still believe this? Core temperature sensing is performed by circuits on the die.
Core temperature sensing is performed by circuits on the die; can't say it any clearer than that. Likewise with the VRM temps; there is a circuit built in. If it is an LM75A then it is "a temperature-to-digital converter using an on-chip band gap temperature sensor" i.e. "Core temperature sensing is performed by circuits on the die". u27 |
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EDIT: temporarily unthwarted, got a gizmo that kinda works on the Altera JTAG. (but not with the Altera Quartus IDE yet) Must forge some 'USB identification papers' for the thing I think. Using openocd at the moment. (built in pun in the name!) Also discovered that KnC made it trivial to do JTAG interfaces WITH the BBB. ('might only' require a cable from one end of PCB to other) Thx KnCMiner! The bar is kinda high for my skillset but I blunder on!  Prolly another instance of, 'tolip opens mouth, changes feet' That went a clear 8 feet over my head; how can I help? |
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user27, if you want to make the image smaller you can add a width or height attribute in the opening image tag. For example, i've added a width=256 statement inside the opening image tag.  Thanks, but I know really, was just messin'. Could you please have a look and let me know what the part numbers printed on top of those two black 8 pin IC packages near the edge of the board and between the two cables in your photo are ?
Sorry, not my rig; it's all closed up now anyway as the cooling sucks without the box to direct the air flow/ What is the result in Gh/s gain?
It's more about cooling the VRM's properly so they don't burn out quite so quickly. However, with cooler ASIC temps he says his rig runs at about 3.5TH rather than 3.4TH (with one modified and four stock cubes). This could be down to reduced errors, I don't know/ If the same gain could be seen across the five cubes it could be upwards of 10% improvement. I should point out that this is based on a very subjective throw away comment and no proper testing. u27 |
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You install the heatsink up to the plate or you removed the plate
As I said I can't claim that this is my handy work; but I think he removed the "E" shape plate yea. |
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Yes any photos please
So demanding...  (sorry, I couldn't figure out how to make the image take up any more space, please quote in full) |
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This is what you get if you put ram heat sinks on the VRM's and swap the fan out for a 3.3A 120mm one (fits inside the cube where the stock 140mm one was):  Connected to PSU via separate cable this also reduces load on that overworked PCI-e socket. I can't claim that this is my handy work; but thought people might be interested to see. u27 |
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Cool, Thanks. I'll "Roll with that" and re-calc.... (if Titan were here today)
Much better, but Titan will be what compared to Neptune when it arrives? Like 15-20 PH. Equivalent to 6000 Neptunes or 17000 s2.
Yea, that's quite a spike coming in right now. China? |
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Wow. For Titan, That's better than 2 Neptunes bring in per dayATM! 2 Neppies barely make .2BTC/day,
if you are getting 0007BTC/Mhz/day x 400Mhz(Titan) = .28BTC/day/Titan. That's 280% more BTC a Titan makes than a Neppie ATM
Is your grasp on the facts really that poor? Where is this Titan you speak of which is mining 0.28 BTC per day "ATM" i.e. at the moment? I gotta put you back on block dude; it's just painful to read. How you ever got the money together to buy any of this gear I cannot fathom. u27 |
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Mega waste of time and money.
Gratz
This guy has clearly done his reading thoroughly; I can't see any reason to question his conclusion/ |
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If you are just sitting waiting for others to do it, assume it will not happen. YMMV All sounds good, but I haven't even got cooling sorted on my Neptune yet... Can't really open my boxes up because it's still running with a dead die and I don't want to give KnC any excuses not to fix it. No help from KnC as yet other than a link to the trouble shooting guide Kurt posted on their forum. Even when I have it up and running properly and with halfway decent cooling I'm not sure what help I could offer? u27 |
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The 3M guy told us that we can mix them together since they use the same chimical elements. But you can't mix a 649 with any 7000 series liquid, it's not the same chemical It's designed that way so you can select the perfect boiling point for what you want to cool. But the guy wasn't an engineer, just a representant. Wait and see, i sendt a mail to the 3M staff, my Novec will be delivered within one week, so i have the time to verify if it's true or not I'll give you the truth from them  If it's false, idk, i'll have some liters for something else, maybe my Zeus miners. I have them for free because a friend of mine who owns a datacenter told them that he must do some tests of this kind of application and if it works like expected and not a pain to install and set up all the entire system, he will order a lot more of Novec for cooling his entire datacenter... so, yeah, they're interested as fuck for the deal  He could well be right but I would be wary of this advice; if it were so simple why do 3M sell 34 61 76 98 128 boiling points and not say a 50 which would save a lot of people mixing? u27 |
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What is the viscosity of that stuff?
Very low, thinner than water I would say. The stuff I posted earlier was a bit too optimistic. (tolip opens mouth changes feet) A part of the puzzle is complete but,,, The FPGA quietly filters requests other than ones matching the stock Advanced page speeds. It rounds down to next available freq. That is a cool feature, errors, (like the ones I introduced) are fixed on the fly at next lowest speed. It keeps kids like me hashin. YMMV So long story short; no overclocking? ok |
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Yes, please explain free; I have only ever been able to get hold of very small samples.
Mixing them is very unlikely to work; I imagine you would just boil off the 7000 first even if they do mix. Same as distilling alcohol from mash; even when mixed you can cause the alcohol to evaporate leaving the water behind.
u27
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