In my experience (v2 board - v1 should be similar), the chainminer update improved stability such that error rates went from 3-10% per chip  (5-7% average, consisting mostly of HW, but a few miso or spi) to 0-3% per chip (1-2% average, virtually no spi/miso errors). this also allows a bit more room to overclock for better hashrate, on top of the 2-3GH reclaimed from removal of errors per card)

Thanks, giving it a shot on my 3 miners right now.

yes, browse its ip-address

Try changing the following lines in miner.h and assuming you are using Auto-tuning. These work best for me


all boards at 0.81+-0.05V

0:   874   39.041   39.287   2727   39   0   0
1:   869   39.829   40.133   2782   25   0   0
2:   756   34.073(This guy has 2 dead chips)   35.482   2380   37   1   0


0:   868   37.438   39.393   2615   15   0   0
1:   822   37.280(one dead chip)   37.438   2604   28   1   0
2:   874   40.358   40.165   2819   24   0   0

Yes, you need to make it. you can make it insideopt/bitfury/chainminer directory

   My order 64x Ready To Ship last Friday and maybe might ship out today or this week.

I believe there are 2 order queues: one for old H-boards and another for everything else. The old H-boards queue has started moving last week but has not yet reached mine (#8xx).

I had the same thing happen with my new v1 h-boards until I brought the voltage up slightly.  I noticed that on 4 of my 6 h-boards, different resistor values were used.

Same on my 2xx order

   I think I got bad pcbs on asic chips and some chips are bad soldering.  I luck me I got good PSU self shut off the power.  I dont know what to do now.

ps: warning anyone got hboards and check for bad solder on asic chips.