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1  Alternate cryptocurrencies / Mining (Altcoins) / Re: Swedish ASIC miner company kncminer.com on: August 31, 2015, 07:33:20 PM
agreed, and I think you might be right. I found this. Its old but might have some helpful information. https://bitcointalk.org/index.php?topic=307055.0. So are you saying in the advanced page , the temps to the far right are the vrm temps? If thats true, and I think it might be, where are the temps of the 4 cores found, or do they average it on the status page? I think the next update might need clear labels on these numbers , as KNCminer gave us temps, but for what!!? Everything is not labeled in the miner, and its needs to be to clear up all of this confusion.

Vegas


Out of curiousity how much did your temps change by when u slid the HSF around?
I have 2 theories,
1. when sliding HSF around this could potentially change airflow caused by your hand etc... and therefore the DCDC's were being cooled more or not depending on that airflow aversion.
2. If slid the HSF caused temperatures to skyrocket for a short period the dies may have went into a limp mode to avoid being blown up.

Just to add my 2 satoshis here. From what I've seen tinkering with these things is that the dies pull more power when they get hot. I had a couple of cubes damaged with the screw fixing at the back coming loose. Dies 1 and 2 would come on then the amps and watts of the DC/DC / VRM's would shoot up to 50 then the dies would go down/offline when watching the advanced page.

I took the heatsink off replaced the thermal paste then secured it back in place and the dies came back on as normal but no longer shot up in power or temperature. managed to get all but 1 die back and working, now its running stable with decent temps.
2  Alternate cryptocurrencies / Mining (Altcoins) / Re: Swedish ASIC miner company kncminer.com on: August 14, 2015, 08:40:00 AM
If GenTarkin or anyone else could provide input, I would appreciate it.

I have a two titans that were working solid, one was 330 the other 320, 1 die dead on one 2 dies dead on the 2nd. After shipment, there are 4 dead die's, 1 half working die @ 200mhz, and 2-3 dies that work when reset, but slowly gain in amperage from standard area around 38-42 (300-325) all the way up to around 52(and over 100C) when they cutoff and everything goes 0.00. I am unsure how this occurred as everything was working fine prior to shipping. I thought at first it was the diff brand PSU's being used, but they are excellent brand/models and should not be causing any issues.

Is the die's slowly gaining amperage a possibility of heatsinks getting knocked loose in shipping, or do you suspect something else?

I will be able to test your fw on the units tomorrow and provide results. In the mean time I would like to brainstorm possibilities for resolutions.

After suffering a similar issue with a Titan I bought recently I decided to contact KnC and told them the symptoms and they asked me to check the heatsink. There is a rivet at the back of the cube which holds a screw in place, on mine that was pushed out leaving the heat sink loose at the back. I just used a slightly longer screw with a washer and nut on the outside of the case and the dies then worked as they should.

Might also be worth refreshing the CPU paste as well, mine had dried up from the heat build up with the heat sink separated from the chip.
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