Topic: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING*** - page 69. (Read 576785 times)

It seems like about a quarter turn or so is 0.050 V, but it's not consistent among cards I find

so how do you "anticipate" the amount of counterclockwise turning of the trimpot nut needed to decrease voltage?

So, a couple of my cards started turning off permanently until reboot again and I cranked their voltage down to about 0.8 V.

Rig is hashing at about 352 GH/s now instead of 360, but it seems stable.

it was confusing b/c it didn't fail outright.  the rig would start out hashing around 300ish, then drift down to sub 100's.  then it wouldn't boot up at all with just a red light.  originally i thought it was the sd card as above posts will indicate but fortunately i have new raspi's laying around.  the fact that the card booted up on the new raspi told me it wasn't the card.  plus, it told me that the ip address was overlapping with one of the other rigs thus explaining why both went to 0 when trying to boot this one up.

inexplicably it started working again but still below 100's.  b/c of this erratic behavior and the fact that just earlier had given me a red light, i decided to swap out the raspi.  sure enough, now i'm hashing mid 400's during the day.  it even hit 640 last night on ozcoin!    these BF's, in general, are definitely doing much better at nighttime when it gets cold here.

it's a bite, at least for me, b/c there are so many possibilities where things can go wrong with these fragile units.  is it the chips, h boards, m boards, regulator, chainminer, or raspi?  my avalons, in contrast, are much more stable and consistent.

on a side note, has anyone noticed ozcoin is showing higher hashrates than what is displaying locally in chainminer?  are other pools doing the same?

Hi
Anyone got bfg working with new v3 boards  as it cannot seem to see them with normal settings that work for v1-2 ?

Deleted my last post because I'm still needing to tune down two cards that go out to zero.  Did your Raspi give any symptoms? 

just to throw more crap variables into the mix; i had a bad Raspi.

bad enough only to take hashing sub 100's for several days making it all the more confusing.  thank goodness it fully failed allowing me to figure it wasn't so much the boards.  inserted a new one and am at least now up in the 400's now.

Chainminer doesn't match my pool readings either.  ugh.

I think you will be happy once you get all your rigs running at 570+, they have definitely been more finicky then I thought they would be.

I honestly think if I knew what I was doing I could get this thing over 600. I am kinda hoping more people experiment with the OCT Hardware and share it with the community. I know there are some fantastic hardware guys out there.

That has got to be the one BIG positive about this whole experience, I never touched any linux before this

I just cat the file like this, lots of ways you can do it in linux.  

cat .stat.log | tail -n 18

That gives you the last 18 lines of the log.

Also you may need to elongate your terminal window otherwise it truncates it in a weird way.

how did you get that output from the pi?

All I know is once I got the heat right, and fixed the overclocked voltage on the bad cards they have been running fantastic.


speed:13536 noncerate[GH/s]:574.280 (2.243/chip) hashrate[GH/s]:586.880 good:40113 errors:426 spi-err:10 miso-err:263 duplicates:3 jobs:262 cores:99% good:256 bad:0 off:0 (best[GH/s]:593.464) Mon Nov 11 01:10:03 2013
board-2 speed   nrate   hrate   good    errors  spi-err miso-er duplic  good    bad     off     per chip        good cores
0:      848     38.397  38.812  2682    14      3       0       1       16      0       0       (2.400/chip)    100%
1:      848     37.438  37.374  2615    8       0       0       0       16      0       0       (2.340/chip)    100%
2:      848     35.648  37.533  2490    55      1       0       0       16      0       0       (2.228/chip)    97%
3:      848     36.665  37.025  2561    7       0       0       0       16      0       0       (2.292/chip)    100%
4:      848     36.751  37.480  2567    12      3       0       1       16      0       0       (2.297/chip)    99%
5:      848     36.278  37.913  2534    62      0       0       1       16      0       0       (2.267/chip)    98%
6:      848     36.980  37.596  2583    63      0       0       0       16      0       0       (2.311/chip)    97%
7:      832     35.147  35.577  2455    14      0       0       0       16      0       0       (2.197/chip)    100%
8:      848     35.247  36.666  2462    17      2       0       0       16      0       0       (2.203/chip)    100%
9:      832     33.816  34.330  2362    11      0       0       0       16      0       0       (2.113/chip)    100%
A:      848     36.307  36.370  2536    10      0       0       0       16      0       0       (2.269/chip)    100%
B:      848     36.235  37.649  2531    67      0       0       0       16      0       0       (2.265/chip)    98%
C:      848     34.761  36.867  2428    50      0       0       0       16      0       0       (2.173/chip)    98%
D:      848     36.063  36.212  2519    8       0       1       0       16      0       0       (2.254/chip)    100%
E:      848     34.088  34.383  2381    5       0       262     0       16      0       0       (2.130/chip)    93%
F:      848     34.460  35.091  2407    23      1       0       0       16      0       0       (2.154/chip)    99%

That's been running since Early Friday without needing to touch it, consistently over 570GH

Others stated NOT to do it that way as it overdeclares your voltage by anywhere between .06 and .02 V

I took out 10 cards, just trying the top six performing cards for the next 30 minutes to confirm for sure that these are working well they are avg about 30 Gh per card (which in my mind is okay if they at least stay on)

A couple things I found with cooling is you don't want to cool it too much, there is this weird middle ground. Also you need to check the Voltage on each Unit, I found some were at .87, some at .80, others at .88, it was all over the place. I have almost all of them now at 8.6 with one card that has some dead Chips. Its been stable for two days but it did take a lot testing. I now only have 3 fans on top of the unit, and 1 Box fan on low blowing across it from the opposite side of the regulators.

You check the voltage with the Unit on, using the Ground on the two Silver PCI power connectors at the end, and the other on the pulse regulator on the silver part. I also had to ask since I don't usually mess with electronics in this way.

The other fine tuning you need to do is with the best.cnf. I just copied the .stat.log to a new file called best.cnf after it ran for around 12 hours and then turned off the Auto on the dead chips, or near dead chips which gave me another 5-7G. I found that info here https://bitcointalksearch.org/topic/m.3079406 and from people in this post.

Don't know - I have all cards plugged in when I got this reading.


`speed:13312 noncerate[GH/s]:383.569 (1.498/chip) hashrate[GH/s]:409.743 good:26792 errors:2066 spi-err:36 miso-err:171 jobs:362 cores:13% good:256 bad:0 off:0 (best[GH/s]:0.000) Mon Nov 11 00:08:00 2013' 

My last reading just now

Is just one of the cards producing all those spi/miso errors?

following Dave's post:


`speed:13312 noncerate[GH/s]:177.511 (0.693/chip) hashrate[GH/s]:188.753 good:12399 errors:1067 spi-err:38 miso-err:318 jobs:295 cor              es:24% good:256 bad:0 off:0 (best[GH/s]:251.141) Sun Nov 10 23:08:14 2013'

About the voltage measurement, yes while running, but read this: https://bitcointalksearch.org/topic/m.3542758

If the voltage is too high, they might begin hashing for a bit until the regulator gets overloaded by a rise in temp.

For the record - My other miner from a competing camp has been working mostly flawlessly all around.  

This unit has just plainly - sucked.  I have run God-Knows how many tests and the only thing I get is inconsistent Data.  I've got a ton of Heatsinks and Fans and it will begin and tune high like within the mid to high 500s upwards to the mid 600s then it just tunes over half of my cards downward until they shut off.  

I'm now off to the store to buy yet more stuff or it (turns out my tiny screw drivers are too big STILL)  


I Too compiled BFG miner and it only ran with 100% hw errors as well (after 15 minutes of running the timings never adjusted upward as they are expected.)  

According to a post earlier - chainminer gives bad data for the 1st 5 minutes anyway so it seemed dumb to run the start mining as a cronjob every 5 minutes.

Here is my last result:

Bank 1
1: 29.721GH/s
2: 0GH/s
3: 31.854GH/s
4: 0GH/s

Bank 2
5: 32.799GH/s
6: 33.945GH/s
7: 0GH/s
8: 0GH/s

Bank 3
9: 26.586GH/s
10: 0GH/s
11: 0GH/s
12: 0GH/s

Bank 4
13: 11.024GH/s
14: 14.431GH/s
15: 5.412GH/s
16: 0GH/s


Off to the electronics store...I'll report better stuff once I can get things up and running.  (I have to run by the job to pickup a multimeter to also check the voltages on individuals cards and will do this soon.  Sorry to be a dumbass about this but do I meaure with the pulse chip and negative lead on the mboard while the unit is on and hashing?  And once I do so I should be tuning it down to .850 right?  I presumed that if the cards turned on period, that they are not necessarily overvoltaged, that overvolted cards will not turn on and begin hashing at all.)