How much of a reduction in life could I expect from my miner if I OC them up too a level like 40 GH per card or approximately 640 GH/s? I'm planning to use heat sinks on all chips and have fans on them too. Could I possibly hope to see something that lasts a year?
noone has been running bitfury chips more than a few months, so its unknown |
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is there any way to prevent the creeping change in resistance that occurs in the hours (or even days!) after a pencil mod? 24hrs ago i modded both my boards (august and oct versions) to run at roughly 35GH
within 2hrs they ran at 36.5
within 4hrs they ran at 37.5
within 12 hours, 38.5
now, at 24hrs, they are both pushing up into the 39.5-40.5GH range and starting to induce errors and intermittent shutoff of chips in 1 board until i swiped off a tiny bit of the graphite to drop it back to 38.5GH
I dont mind them creeping up a bit, but its hard to tell if/when/where it will plateau. IME, 41GHash is about the point where (even with lots of airflow) chips start to turn off, eventually the whole board is left with 0-4 running chips (at about 2.4-2.5GH each)
better way to do it change resistor. all i have is a terrible pencil iron, minimal soldering skills, and no resistor(s). Id rather not risk the downtime to destroy my board |
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is there any way to prevent the creeping change in resistance that occurs in the hours (or even days!) after a pencil mod? 24hrs ago i modded both my boards (august and oct versions) to run at roughly 35GH
within 2hrs they ran at 36.5
within 4hrs they ran at 37.5
within 12 hours, 38.5
now, at 24hrs, they are both pushing up into the 39.5-40.5GH range and starting to induce errors and intermittent shutoff of chips in 1 board until i swiped off a tiny bit of the graphite to drop it back to 38.5GH
I dont mind them creeping up a bit, but its hard to tell if/when/where it will plateau. IME, 41GHash is about the point where (even with lots of airflow) chips start to turn off, eventually the whole board is left with 0-4 running chips (at about 2.4-2.5GH each)
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Fixed price 45 BTC + SHIPPING + ESCROW each.
common sense - fixed price items dont belong in an auction subforum *facepalm* |
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I just got some old style H cards today so I shutdown and inserted the cards. And of course when I restarted, the SD card won't boot. This has happened every single time I've shutdown and restarted. Why?! Now I have to re-image the card and try again.  What am I doing wrong here? the one and ONLY time i used the shutdown command, my sd card needed to be re-imaged in order to start up the system. I ALWAYS turn off the psu if i want to turn off the miner, and turn on the miner via turning on the psu |
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Hello BFS friends, I recieved the BFS rig today. v2 m-board and 3 x h-boards . The problem is I cannot see anything running. I tried lot of things. Boot screen says something like "miner: no process found" the /run/shm/ is quite empty (no logs) can somebody help me, please  thx hmm. few ideas: 1) take a voltmeter to the board and check voltage across the pads that [used to] have capacitors. - you should be able to see ~0.79V, but IME not each pad set has voltage on my unit, so test a few to make sure 2) check your ip - is it actually on your home network with correct gateway setup so it can get online 3) check your pool info - if this was the issue, youd likely see your chips all at 0GH 4) check the orientation of everything. if a card or the rpi is backwards you could either cause damage or simply not see anything 5) make sure you are filling the banks as advised (slots 1, 5, 9 in your case) 6) try with only 1 card at a time and/or rearranging the order - maybe an spi/miso issue somewhere is causing the issue |
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i mine hoping that BTC will be worth $200 one day. oh wait, thats today!  ...how about $300? |
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 so i spent some time rearranging my rig setup and got it up and running at 77.5GH (2 cards) before realising that i am pulling air through the tunnel, rather than pushing/blowing it. *facepalm* Previously i was able to have semi-stable operation at 81GH (39.5-41GH per card) but the system kept dropping chips or a full card to zero. that fan setup was a lot more rickkity with 2-4 fans in use and creating slight vibration. I plan to watch the new setup overnight before either a) overclocking further or b) getting a second 230mm fan to increase airflow (and then overclock!) |
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so i spent some time rearranging my rig setup and got it up and running at 76.5GH (2 cards) before realising that i am pulling air through the tunnel, rather than pushing/blowing it. *facepalm* Is this going to limit my cooling my any significant amount? It seems to handle very well at the moment, but im a little annoyed with myself for making the wrong assumption on airflow direction. Im even considering grabbing a second fan (230mm!) to double the airflow - would this be beneficial or simply cause turbulence? |
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Try changing the following lines in miner.h and assuming you are using Auto-tuning. These work best for me #define MAXSPEED 55
#define DEFSPEED 54
#define MINSPEED 53 Thanks. Does this require running 'make' after editing that file? Yes, you need to make it. you can make it inside /opt/bitfury/chainminer directory how would i do this on a running unit edit: think i got it. cd /opt/bitfury/chainminer
pico miner.h
*make edits to file, then exit with saving*
make
sudo reboot |
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I got a reply from Steve. I asked about refunds of boards and gave an estimate of how much he will be able to refund. I won't go into specifics as it's not my place to. I'm fairly certain (short of travelling and seeing him) that Steve is working hard to salvage what he can from the situation. He also seems likely to plough on with future projects.
My guess, everything is still up in the air concerning lots of things though.
To all those still waiting on refunds, all I can advise is to provide your information via the email on the website. I don't yet believe that anyone will be out of pocket in terms of chips at this point.
Ive gotten absolutely no reply or refund on my K16 order and have emailed via the site. |
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Hey my Raspberry PI just burnt out.
I upgraded to a new v2.3 M-board and it burnt my raspberry Pi. Component D17, a black diode near the micro-usb port had white smoke coming out of it.
I desoldered the component, and the PI powers up, but looks like the IO pins are shot as no Miners are detected anymore. Plugged the PI into a v1 board with same results.
the v2 m-board has the RPi flipped upwards rather than downwards like the v1. did you rotate it 180 when changing boards? |
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Has anyone noticed that the version 1.2 h-boards with and without capacitors don't mix well?
I have two of the original cards with caps that run very happily at 32 Gh/s (with a little pencil-modding) until I add a third card without caps - then they both drop to sub-20 and the third card runs at 28. Add another new card and all 4 drop in hashrate to sub-20. Remove the third and fourth card, and the first two return to hashing at 32 Gh/s with no problem.
I also seem to be able to run 8 non-cap boards by themselves with no trouble - they have a different resistor installed and they each come up and hash at 28-32 Gh/s. However, if I add one of the original boards in place of one of those eight, or in addition to those eight - they all seem to go to crap, regardless of the position the older card is installed in. Hashrate drops from 220 Gh/s to zero over the course of an hour or so. Lots of heat, no hashing.
Remove the board with bypass caps from the group without, and the newer ones hash fine on their own. Remove the new cards, and the old two cards return to hashing just fine on their own. Mix the two types, and strange, and invariably bad, things happen to hashrates on all of them....
There is some odd incompatibility here. Did anyone ever figure out WHY the bypass caps were getting too hot and blowing up?
*Very* good observation. I'm dealing with something similar here, and I was in such a hurry that I didn't notice the missing caps on these boards. My unit with mixed boards will hash fine for hours, and then out of nowhere, performance will tank and every chip kicks out miso errors. Most of the time when this happens, an entire board just "disappears" from the stats (even though the boards further down the line are still recognized). I have 1 of each style on a V2 m-board. both are overclocked into the 39-40GH range and in a new cooling arrangment so its hard to factor out some variables, but they seem to run well together, though every 4-6 hours one board will drop to 10-50% speeds until the miner start command is used. (crontab does it every 2hrs). The issue appears to be related to the overclock though. 40-41GH was stable for me with only a single card, but now im challenged to get it past 38.5GH due to the re-arranged cooling and extra card |
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wtf is with people buying Avalon shit after what Yifu has done?
well most likely they sold these at a loss/no profit so you could call it revenge I guess? definitely a better PSU to go past 375mhz.
They barely pull 600w at the wall so there should be plenty of headroom with the psu that is already inside in them. Actually yeah I guess they have an 850w PSU so the limiting factor will probably be the boards. Will wait to see what the experts figure out  part of the 850w is devoted to the 5v and 3.3v lines (likely 150 and 30w respectively) |
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Is there any danger i I get 2 separate psu and connect each to one of the PCIE connectors?
There is a little danger of blowing the PSU, if the PSU are not synced. I did that for a few days, but it's best if the PSU are from same manufacturer and are turned on simultaneously. agreed. there could also be backfeed between PSUs, where even if one was turned off, it would have a live 12v line to its components due to the other psu, and this could cause any manner of problems (ranging from nuisance like fans/leds staying on up to component failures/magic smoke) my understanding was that somewhere in the system is a 30A limit. i dont know if its per card/bank/or the entire m-board. if it is for the entire m-board though: 12v*30A = 360W + 20-50% overhead = ~500W max (if overclocking to ~35GH/card = ~45w/card, you might be limited to about 11-12 cards)
however, i am entirely guessing and spitballing numbers based on all forms of annecdotal info. intron would probbaly be the guy to ask/PM about this. |
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price: 0.75 btc each (18.75 btc total)
first comes first served.
not sure if 'fixed price' and 'auction' belong in the same phrase. |
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So h-boards are back in stock with 250 count... where's the shipments?
Wow, I literally hit Save about 30 seconds ago...yes I have a few extra H-cards of the old type that arrived. Since I don't the M-boards for them, they are only useful for filling out your V1 or V2 M-boards. Buy them now, and they will ship immediately. Production is cranking for the next-gen boards, but I haven't received any shipping notifications yet. I expect to see something in the next day or two...when product is on the way I'll give an update. i have not yet gotten my store credit for august delay. push that through and i'll probably buy a board. however, a price drop to $400 would be appropriate i think. $500 is fairly steep at this point Agree. Once pre-orders are filled and have in-stock, why are the h-board prices of version 1 not being adjusted and still cost the same as initially announced??? It's only a week from November by the time those cards are delivered anyway. Doesn't make sense. At this point, they must carry around a 70% margin on those cards while the ROI on those cards for miners must be around 10%, if anything. In other words, at a price that neglects reality bitfury is sucking almost every single drop of value both in BTC terms and in relation to other competitive products delivered this month like KNC. I agree their price of those cards shouldn't exceed $400. The h-boards will now return approximately $300 in their useful lifetime given the recent increase in value of BTC. Shortly after the first of November, that will have dropped by almost 50%. +1 Has anyone even ROId on their Aug kit? If I use the Aug BTC prices of lets say $110 then I just passed 1/2 mark on my $1.3k kit.. that I am running at 45gh/s With today's prices I just ROIed though. Definitely not getting the h-card as $500 for let's say 32GH/s is a loosing proposition at this point. offered a proper price, i would like to fill my m-board. but at $500 it would make no sense. $400 and id buy a few. $300 and id buy a dozen. I got a starter kit and an october board when they were $450. i doubt ill make more mining vs if i had bought coins at the time, but at the new $170/BTC price, i will probably break even in 4-6 months. I like the hardware, and its power-efficient, but the pricing makes getting profit a tricky situation when were looking at 100%/month increases for the next 2-4 months |
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i mine with a bitfury system for a few reasons:
1) its fun and techie and a bit of a hobby to overclock them (same way people overclock a cpu with nitrogen if only for 5minutes of benchmarking)
2) bitfury is one of the best W/GH available now or in the coming 2-8 difficulty rises (0.8w/GH at 1.7GH up to about 1.6w/GH at 2.7GH) vs KNC as the closest competitor. Bitfury will long out-run BFL/avalon/asicminer (gen 1 and 2!) when difficulty starts to plateau
3) i actually expect to make back most or all of my money in bitcoins (granted, could probably have bought coins at the time and made more profit, but i paid via CC and at the time the difficulty rise seemed less intense)
At current bitcoin price, I will probably break even on my $1750 investment that has mined about 4-5BTC already and is now running at 78-80GH/s (anticipated income of another 6-8 BTC in the next 4-6 months). depending when we see a plateau it may even be more *cross fingers*. but for right now, i enjoy the tinkering and the overclocking as a hobby that becomes more stable every day!
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Since I filled each slot in my miner I'm having also ... problems to maintain ... hashrate of each board over 30 GH ... I'm unsure if it's because of the heat ... or the heatsinks ... that are blocking airflow, ... a PSU issue? .... some how I've some boards that work on one slot better then on an other one ... does anyone has a good approach how to get ... the best postitions ... ^^
also I'm seeking good heatsinks ... for the regulator part the arctic cooling stuff is to big ... something around 5 mm ...
In my experience it's a big problem when more than 3 slots per bank are used and to have >30GH/s per board. I think it's a software issue. Any hints from the developers would be awesome. I have even tried soldering power cables form each H-board directly to the 12V connector, but no fish. I found some sweet 35x35x6mm heatsinks. 4 of them work great per board and leave room for airflow between slots. as for 3 slots per bank, i beleive its related to the 30A limit of a texas instruments chip mentioned by intron a while back. Its got 10-14 pins and there is 1 per bank. Most likely it simply cannot handle more then 3 overclocked cards or 4 cards at 25GH |
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One of the chips on an H-card received last week has been giving hundreds of miso errors per 5-min, and is giving no good results, but all other chips and cards, before and after in the chain, seem unaffected. Is there something I can do about it, or should I just write off that chip as bad and ignore it?
probably a bad chip. theres a few things you can try: 1) put the board as the last in your rig and/or try a different slot(s) 2) raise the voltage slightly. probably wont make a difference, but sometimes the chips seem to get themselves settled in with a little bit of heat/runtime. i had a chip go from <0.7GH for the first 2 days to being a totally normal operation after voltage tweaking. 3) look for any issues in the components and traces around the chip. (you likely wont see anything, but worth a try) 4) send it to me and ill test it in my system |
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