That is a long ago posted problem i have 8 boards which in no way want to run at 950
At least not if they are connected to the miniplanes and double scroll
In fact it has been since i got them a enormous issue to get them working at all
Every day i MUST reset the whole miner setup 2 times to make sure it does not crash and is dead for many hours
If i put one board direct into my pc with a fat usb cable ( not the tiny ones delivered by the boards) but one which i got for my ereader i can get it running with 49 or 50:2:950 v
As soon as i add another board the asic error hell starts and ends in cgminer crashing, so if i would have 8 pc's i could run them at 50:2:950 and maybe higher. But to be honest i do not have high hopes for that experiment either.
Sometimes when i am lucky the board start instant at 50:2:850, the 50 is the magic number here.
But often that will not work then it takes lots of tries and restarts till they run again
Often takes about 4 to 7 times before they start hashing again, reflashing these bastards have helped a few times but often does not help much.
They start by hashing at say 1 to 5 Ghash and slowly start to go up and if they are in a good mood they start running slow and see the asic errors disappear.
I have no clue what the boards did before i send them to the repair guy, i never had ran them they was after i received them end december direct to the repair guy hoping i got lucky to see them shortly after christmas returned but even that turned out being end januari.
I tried running them under win in either x86 or x64 versions like xp, 7 , 8 , 8.1 and tried ubuntu , raspberry linux every time i can only get them running stable for a few hours and often they simple crash the whole miner thing
When i use cgwatcher under windows which restarts every 4 hours i had the most luck, but even that ended sometimes in a horrible system crash.
However i do have a wife and other family members and small children in my small house often, so you can guess what the ladies want with this miner things....
You probably guessed it right they must move out of the house. So they are now on a small cabinet in my garage. sharing the cramped space with some real miners.
Actually temp wise it was a good move, they are now between 20 and 30 C max. my little house is not nearly as cold as the garage where the temp at this moment is below 12 C and in the cold days even was -5 C which made the miners run at a nice 16 to 23 C funny enough the boards with the highest temp are the 2 just above the lowest ones.
So in all its every day a challenge to keep them working they are now on a psu which is 1600 watts feeding only 2 antminers and the 8 db boards connected to the r.pi
I tried the image given by TK1337 which runs bfgminer but that gave another weird result
7 boards run ok ( even a bit faster then i ever get them on the old) but one board pumps out at least 95% errors
Now comes the hard part.... every time i reboot the machine another board is suddenly the failing one.
So after endless tries on getting them to run with that image i gave up and moved back to the old v7 image with cgminer 3.8.5 and keep them running at the same old setting and each day do the routine by restarting the crap and check as many times i can to see the crap still runs.
Yes i say crap, did i mention they are crap.
The freaking ants i never ever have to watch if they run.
My knc box which is making up the enormous losses i made on these db boards less painfull
Had 2 repairs and took many weeks before knc took them to get repaired but now i never have to look at it.
Runs and mine as it should these are the real ones the super nice boxes.
Setup once and never have to look at them .... well hardly ever
