Topic: DRILLBIT SYSTEM Miners - Avalon range available - Now $104.99! - page 7. (Read 273811 times)

I have 12.  They run at about 220 gh/s.  I have 9 on a rpi and 3 running on pc with cgminer.
I restart them 3-4 times a day.  Sometimes they die completely, but mostly one or two boards goes zombie.  But you have to restart to get them going again.  But this now represents less than 10% of my mining power.  So it is what it is.

I paid 28+ btc for 8 boards + 2 miniplane + 1 double scroll + express postage.

Received the boards just for christmas send them to england for repair , they came back 3th week januari

In all the extra costs for sending dead board, repairs ,customs and last but not least taxes i had another 210 euro in costs

I will not count all the extra bought cables the rpi the several usb hubs 5 x 120 + 140mm fans and the usb cables if i had to count those this would end up in an extreme costly miner.

So they ran 145 Gh on avg in which they often died after a few hours and the endless times to reboot and get them to run stable i think i got in those 30 days running at say max 10 hours a day real mining given the diff i started you can calculate that i did not got much back.

My energy price is 0.32 dollar per Kwh so what did i make back .... you guessed it indeed nothing i got barely my energy back from these.
Because even though they are not mining and hang in a endless loop they still burn energy and produce heat ... thats not fiction but truth.

The one who made up many of these losses and costs is still my knc box. I am still struggling to get these db's to run stable.
Changed os many times, bought an rpi just for this boards since that was looking promising at first.
Have been testing countless hours turning them on and off.
I am glad that i do not know how they ran before repair, and actually had no time to test those days just before christmas so sending them instant for repair was the best option for me. So i have no idea if they could have run faster then before. But the board i got which replaced the dead board was repaired different but is in my case the slowest of all. So is it because of the repairs i do not know.
The only thing i know is that i can not get them to run stable above a certain speed, the speed on itself is important but i would not care if they would not crash so often. I can not have them in the house ( because playing children and the wifes who own those kids kill you if they get hurt by your toys)
Yes i had one connected on my pc and that ran for short time at 50:2:950 but again added another board and poof again messed up.
Ofcourse that was not long time testing but i can not let these things in the house for hours, without the woman and kids getting near this.
In the garage they are high and safe from kids hands and do not come near the ladies who hate these stupid toys which men call their miners.
Even if you say it CAN pay money they still hate them , why because if i am home i spend alot of time getting them to run....
And then we are back to beginning its a endless loop.
The knc and ants run ... i hardly have to check them they simply run and make coins at this moment about 0.08 btc a day and the db boards make lets see 0.004 btc of that if the pools i am at do not hit another 20 Billion shares block which seems to be normal these days.
    
I hear some of you think sell them ... well i am tempted but i am scared the people buy them make my life miserable when they do not get what they see some others are getting and was promised when they was for sale.
And i can not give them the guarantee the boards run like some do for weeks without crashing, again mine do crash about 2 to 4 times a day.
I tested any solution i saw and not one of them works to satisfaction, the other problem is if i try sell them people at first say i pay you $$$ and when it comes to paying they suddenly lower the amount and say yes but now its blah blah.
I am tired of that BS and all the scamming and bad things in the coin world.
Yes there are a few good guys out there which i do trust alot, but their are not many.
Almost everyone nowadays only thinks about himself, that is the cold truth.
So enough ranting back to the wife who got pissed again at the miner because one of the fans cut a piece of my finger

I'm jealous.  I'd have to go back and look, but I think I paid right around 12 BTC for my four boards and I have yet to mine 2 BTC.  : (

Chad

How long have you been mining it for?  That's alot more BTC then I've gotten and it's certainly long enough that statistical fluctuations should have evened out.

Yeah that would be a bummer. I might be lucky that my boards tend to only spit out LIBUSB errors after about 2 days and 6 hours, so I can almost always count on a daily (or once every two days) automatic PC reboot to do the job. Only problem then, is the trouble getting the boards to actually start at 950mV on the first go. Usually doesn't happen... so to avoid stuffing around every 1-2 days, I just leave the boards at 850mV.

On a related note, some power consumption figures if anyone is interested (4x 8-boards):

88.50GH/s @ 130W = 0.681GH/W (all boards at 950mV -- takes many attempts to get started, fails after 2 days 6 hours...)
81.25GH/s @ 105W = 0.774GH/W (one board at 950mV, others at 850mV -- takes many attempts to get started, fails after 2 days 6 hours...)
76.70GH/s @ 95W = 0.807GH/W (all boards at 850mV -- starts reliably, at least a week of uptime, probably more if I just let it run)

The base PC takes up an extra ~30W including fans, so with that included:

88.50GH/s @ 160W = 0.553GH/W
81.25GH/s @ 135W = 0.602GH/W
76.70GH/s @ 125W = 0.614GH/W

I have just one board, which was modified to use the linear regulator by Drillbit in Sydney.  It has been running now for 'ages', like many weeks without any hiccups at an average hash rate of 22.5 GH/sec.  It runs at int:53:2:950 using cgminer 3.10.
The estimated BTC that it has generated is 0.65, and cost about 0.625 BTC, so ROI has been achieved in BTC, disregarding the recent upheavals in BTC value, but it still has some time to go.

Cheers

yeah that part i use to use, but what if the miner stops for whatever reason during the day/night you can start with a profile but you cant after x minutes switch to another profile.

It can be done. Reboot CGWatcher every day at the same time, and setup multiple profiles for each clock/voltage setting.

Eg. In the scheduler section:

* Set default profile to 45:1:750
* Restart CGWatcher everyday at 6pm (to start with 45:1:750 as it's the default)
* Change profile to 48:1:850 at 6:10pm
* Change profile to 53:2:950 at 6:20pm

If you get LIBUSB errors after a couple of days that require the PC to be rebooted, then set CGWatcher to automatically reboot the PC each day, and tick the box to run CGWatcher on startup with the default (45:1:750) profile.

This worked great for me for a few weeks, until my boards absolutely needed manual stuffing around to get them running at 950mV... I'm now just running them at 54:2:850 for 76.7GH/s total (three of them at 20.4GH/s each, the last one lagging behind at 15.4GH/s...). It's stable for at least a week at a time, if not more. Just need to stop playing with the settings and let it run for a few weeks.

ok so start slow and go faster slowly. thats one thing cgwatcher lack is that type of thing

mmm you might have a point there start it slow and slowly go faster... going to try it.


ed YES! that did the trick started with 45:1:750 ran for 10min, move to 48:1:850 another 10min now running 53:2:950

I've only got one board, but it has run fairly stable since it was repaired, albeit with 15% HW error.  It still puts out a consistent ~20 GH/s at int:52:2:950.   My downtime is more caused by ISP outages causing CGMiner to freak-out than by anything else.   Mine was repaired in the UK by Milkbottlec.  I never ran it before sending it off for repair.   It's made 0.24 BTC since I started mining in early Jan.  Far away from break-even at today's BTC prices. :-)

I'll count myself lucky that I only got the one so aren't having the mutiple boards problems.  

It seems obvious to me that maybe the problems you all are having is the quality of the repair itself?   Have you considered having them resoldered or re-repaired again?   Is anyone at Drillbit responding and could maybe speak up about the design and/or parts that should be needed to fix the initial problem?  I'll admit I haven't read every message on the Drillbit Forums but I don't remember anyone but the 'repairers' being told what the parts were / what the issue was.

I feel the with you i can not get these boards to run faster
So i might be lucky i never saw them hash before the repair, i might have broken some walls out of frustration if i did.
But nevertheless i see people posting speeds these boards never will make, when i connected 1 board direct on my pc it ran at 950 but guess what it did the same speed as it did at 48:2:850 so exact same speed only higher voltage
But again when i took another board and put it onto the same usb mainboard connector they began to asic unresponssive blah blah again

Running them individually never helped my boards.  I tried them on three different computers and three different power supplies.  I also tried several different USB cables.  If I enter any settings above 40:1:850 then I get nothing but asic time out errors.  It was very frustrating for me because before the repairs my slowest board was running 21+ gigahashes with 14 hw errors after running for an hour.  I have a screen shot of one board running for almost an hour at 21.9 gigahashes with no hardware errors at all.

Chad

Got them back alive on the old v7 image and slowly increasing speed again....
btw any settings on 1:750 or 2:750 failed it gave an error and crashed
I got them back alive with 48:2:850 but it might have helped that i shut them down for 4 minutes without juice as well

try 45:1:750

Ok lets see if feeding them one by one is helping

Experiment number 12,234,123

I hope i get to see the serials as well

Update got the serials inserted however still one board constant blowing 100% HW errors with bfgminer
lowered settings now back to 50:2 on all boards to see if that helps things
Sadly even with 48:2 still one board at random constant giving 100% fail
reboot makes another board take its spot and endless stream of 100% fail continues
Its if the boards not respond on the serial as well, it simply runs at about 100 Gh  

now the endless pain to get the boards to run again .... SIGH

@bronan yes, try them one by one powered directly. also in my case didnt like 850 nor 950 for like two hours but came alive after that.maybe the voltage regulator doesn't somehow reset after a power dip?

Bronan:

Hmmm you may want to try BFGMiner again.

Here are my 5 boards running on a miniplane (and yes they don't like 950v) fully stable with BFGMiner and Debian on a Beaglebone Black running for over 13 days without touching it:



And here's my scan and device settings in my BFGMiner.conf if it helps any:


Oh and the reason for the blank status display is because I'm running in quiet mode (-q). If I'm not touching them, no need for them to spam the terminal.

I've got 8 boards running at 170gh/s+.  If you're using a miniplane or backplane try running them powered up individually.

Same speeds here Chad average around 18 Gh
8 Boards should be 160 Gh plus but its more like 140 to 150 on average if you lucky they run at all