Topic: [GUIDE] BitFury Miner Support/Tuning - page 3. (Read 148049 times)

got a link to image? OP links does not work...

EDIT: found it, prev page

I'd recommend a new image and SD card

I need some help.. I have M-board 2.3 and 16x H-card v1.2

today I had to shutdown (sudo halt) miner to move it. After blowing away some dust and starting it again, is started hashing fine.. approx 15min later it stopped.. webserver responds
and no ssh connectivity at all.. next time I stayed in with my ssh connection. now I cant do a thing in shell all commands are dissapeared.. Do I have faulty SD-card that has unmounted itself?

6 of my 16 bitfury v1.2 H-CARD died over the time. October 2013 batch. no overclocking and no overheating! did someone face the same experience??

EDIT: seems to me quality of the bitfury v1.2 H-CARD (October 2013 batch) is not good enough to work with it 24/7 for a half year. some component on the card died. cards did not work again if I changed the slot on the bitfury v2.3 M-CARD.

I've been altering these lines in driver-bab.c

#define BAB_MAXSPEED 57
#define BAB_DEFMAXSPEED 55
#define BAB_DEFSPEED 53
#define BAB_MINSPEED 52
#define BAB_ABSMINSPEED 32

#define BAB_TUNEUP 1.0
#define BAB_TUNEDOWN 10.0

https://github.com/ckolivas/cgminer/blob/master/driver-bab.c

These are also the values that can be passed to cgminer on startup. The format was posted by kano in the cgminer thread...somewhere around pg 700 I believe.

Actually 710:

https://bitcointalksearch.org/topic/m.4726840

From asic-readme:

--bab-options Set BaB options max:def:min:up:down:hz:delay:trf

https://github.com/ckolivas/cgminer/blob/master/ASIC-README

Hmm, seriously? I'll have to test the power draw. With chainminer it sucks about ~300W on the wall @380GH/s, i haven't tried it with cgminer.

Tuning... somehow that doesn't sound as fun it sounded few months ago . Oh well, it'll be propably worth it.

What options are you starting cgminer with?

Put a meter on that rig. You'll find that power consumption is dropping off a cliff. Cgminer is tuning out hw errors and chainminner is happily gobbling up power without regard to hw errors. The difference in efficiency is not small.

You can make cgminer behave the same way by just changing the tune up/down values. That's an optional value you can pass directly to cgminer without changing the code.

Yeah cgminer does work with these cards, ive been testing it now and then, but have always returned to chainminer. The reason is that even though the speed looks very good after a while it tunes itself to max speed (385GH/s vs. 420GH/s max speeds, chainminer vs cgminer), after a day or so it goes below chainminer speeds. I guess restarting cgminer daily would fix that, haven't really bothered as chainminer just rolls on on autotune. And cgminer does have some options to tune bitfury cards manually, but currently i just want my rigs to run without constant tuning .

I compiled cgminer with --enable-bab (black arrow bitfury). It autodetected all of my v2.2 cards properly. I can't speak to how this works with v1 cards, though I know it tries to detect those first.

I've gotten cgminer to match chainminer top end performance with similar settings, which is a huge win given cgminer's wealth of features. The real advantage to running cgminer on bitfury rigs wasn't immediately obvious however. I let a rig with 14 h cards run overnight with stock cgminer parameters and it tuned out so many hardware errors that efficiency improved by over 11%(.8622 vs .7747). Aside from potential uses to diagnose problems I've no further use for chainminer.    

How did you get Cgminer to work with bitfury h-cards?
I only managed with bfgminer, cgminer only wants usb stuff

The goal of this thread has been reached with success! A lot of info!

I tried bfgminer as the proxy and though the shares make it to bfgminer, they're all discarded as hw errors. Not sure where the problem lies as I've encoded credentials into jobconnect. Perhaps I'll throw the question at Luke-jr at some point.

Update:
Nevermind THAT ^^^ CGMiner works a treat now on bitfury rigs. Bye Bye chainminer and the lamo proxy. Thanks ckolivas for the awesome miner! Finally got some cgremote action on bitfury rigs. Huge thanks to Kano, who apparently did the bulk of the work to the bab driver.

https://bitcointalksearch.org/topic/m.4726840

I'd suggest using a pencil eraser instead of sand paper. Will get the job done really good but only remove the oxidation not the metal.

I would try one h-card at a time in chainminer to see what chips are working and which are not doing so well.
Check for oxidation on the pads, clean them with sand paper or put a thin film of solder on them(not the best solution but works for a while, then you have to sandpapaer again).

I have a home made m-board and found this to be a problem, i will solder the pads with wires once the setup is complete... so no more oxidation problem.

Also i have found that lowering the iovdd to 1.6...1.5v makes the "50% drop in freqency detected, reinitialising" error in BFGminer and the miso errors in chainminer go away. I dont know why... so dont ask.
as i been told by intron, the mAmps required by each chip decreases with voltage and the lm2596(3A) or the lm317t(1A) can take it... or i have o source of noise in the iovdd line(no osciloscope to check) ...who knows... lowering it just worked for me.

I know its not an option on the retail m-board, im just sharing my findings.

hi all,

i am running the v2.2 h-cards and one of them are only hashing at 9gh/s. i'm guessing its due to the voltage being low.

can someone help me with a step by step instructions on how to increase the voltage on my h-cards?
what tools do i need and what size?
what direction should i turn the voltage adjustment trim potentiometer?

if you have pictures. that would be the best. I'm more of a visual learner.

thanks all

Is there already some one with ... some rev2 test boards ?

I got the 32 dev. chips today ... :-)

sent them straight to wasp ee's

I'm game. Pm me the price and we can discuss details. Thx!

Well you are not going to like pricing ) ... one asked through pm and i said the following:
- As it is 1/4th of a full m-board it should be 1/4th of the price meaning 50 euros(as a full v2.3 m-board is 200 euros)
- and i could to a full one for 150 euros

... before judging the price please consider that i built them in my spare time and i have a job, the manual labor on these is not easy,
they are not massed produced even if the BOM on this is about half of the total cost.(takes 2 days to make one from 0, if the only thing youll be working on is the m-board)

also consider that they are not in stock, look what happened to DDR Ram pricing, as ddr3 came out, ddr2 became more expensive because it became more rare.
i am not trying to explain myself, i just want people to take in consideration some facts before saying ... ohh it too expensive... or things like that

I am building a second one, but i cant seem to find how the hell are those ISA 10 contact slots are named, so i dont have to cut actual ISA slots in pieces... desoldering them from motherboards is F...ing time consuming.

If you like to try my second one(aka test it) i could send it to you, if you like, you keep it at a price, if not, you send it back.
This offer is also for tarmi as he asked for one as well through pm.

I may like to try one.  I have some very finicky h boards.  What do you charge?