Intron - Is this design based on the same idea that Tytus had:
2. 8-chip cards that were supposed to give more hashrate per chip using the same 30Amp power regulator, this design failed !!! the new PCB was designed as 2 layers and it generates too much noise to connect 2 h-cards in one bank ... so we can use such cards only in the last position of the bank.
3. provisional 5V string designs [no power regulator], this is a very promising design, chips run very clean and fast, but require cooling. If this is not provided or if it fails, chips heat up, leakage increases, chips consume more power and heat up more and melt and burn finally
http://150.254.111.246/img/S7300314.JPG,
http://150.254.111.246/img/S7300316.JPG ... the chips don't have any thermal sensors so I am still thinking how to detect such problems using the hardware we have.
(in case the images above don't work here are the two images again:
http://imgur.com/D7yH26n and
http://imgur.com/gqVOtA5 )
and where you later commented that it was an experiment that went out of control -
It's an experiment that went a bit out of control.
The latest scientific explanation I heard is that
"the boards don't like women." Not really sure
about that though:)
intron
So basically - is it the same design? If so - what has been done (and was there anything done) to avoid the same outcome as tytus' ?
And just out of curiosity - are you guys going to be publishing the design schematics?
this was my concern too, but intron's design has its own controller, so perhaps (hopefully) it is capable of detecting a lost chip and acting (restart the mining process or turn off) so that we dont see a bunch of home fires and molten PCBs
The microcontroller is pretty much irrelevant for that issue.
The issue that Tytus had is the same one that you get with any Christmas lights string - if one light shorts the rest get some extra voltage. If two short, the remaining lights get even more overpowered. And it gets worse and worse even faster until they all melt and/or the fuse blows.
Or if one light burns - they all die.
In tytus' case he was getting the first option - when chips overheat they tend to use more power and then they start overheating even further even faster until they hit the limit and the melting point. At which point you get either a short in one of the chips (and then everything dies very quickly), or the chip cuts the string and again everything dies. Actually my preference would be for the second option - at least the rest of the chips may survive
Unfortunately (or fortunately?) bitfury's chip has a very solid design, and it's much easier to melt the silicon inside than to burn all of those power wires.
Bitfury said at some point that he gave up on that design (quoting various reasons) but as time goes people may have found a workaround - and if that's the case - lots of respect for intron and co!
And I guess that's the root of my question - is it some novel approach?