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So put a fan next to them.
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No it can only be used for mining bitcoin and SHA-256 altcoins.
It cannot be used for hacking, cracking, backtracing, etc.
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Nothing rare, but my two little USB erupters arrived today. Set them up on a shelf above my desk with a D-Link DUB-H7 7 port hub I got for $23. I quickly realised that they were reaching 70+ deg C temps when I was setting them up and the 2x 15 watt server fans really help (but they are running at 3.3 volts so they are essentially silent). Miners now get better temps of about 45 deg C (25 deg C ambient) after running for a while. Getting <1% hardware errors in bfgminer I might have to look at that later.
Is there any components on the other side of the PCB? Or is the aluminium heatsink removing heat through the PCB itself? Some micro-sized heatsinks might be in order for the ASIC chip on the top side in any case...
You realize your fans are easily using 6 times (or more) as much power as the USB miners themselves? Those fans are also noisy as FUCK. You can be fine with just a gentle breeze. The USB miners actually don't need any cooling at all. The manufacturer has tested them with zero airflow and even removed the heatsinks (the chunk of metal with the BTC symbol on it) and they still ran just fine with no increase in HW errors. If you really feel you need to run fans, get something slow and quiet. Something that uses very low power. A 240mm fan that only draws 0.8 amps @ 12v will cool 50 usb miners without a problem. As I said they are 12 volt fans running at 3.3 volts. At 3.3 volts they use 0.145 amps each (measured with DMM) = 0.48 watts each. So actually the two miners use about 5x more power than both fans. And as I said they are silent at 3.3 volts. Also the average longevity of the ASIC at ~45 deg C is going to be much better than some at 70+ deg C. Sure the manufacturer tested them but they didn't test them for months continuously nor would they have conducted a long term study of their failure rates vs temp. Given that these miners will probably never pay for themselves (even if they last for years) it makes sense to operate them at lower temps to try and maximize their working life. Also if the ASIC and other components are heating up the entire circuit board (especially with the assistance of the heat spreading 'heatsink' on the bottom of the PCB) while there is no airflow then the other components will also reach unfavorable temps... https://i.imgur.com/QnaIvC7.jpgAOZ1020 - Maximum ambient temperature 85 deg CCP2102 Maximum operating temperature 85 deg CATtiny2313 - Absolute maximum operating temperature 125 deg C74HC574 - Maximum operating temperature 125 deg CIt's not surprising that some of those components could reach the temps above if they are sitting on a PCB thats over 70 deg C, especially the voltage reg which would have to dissipate quite a bit of heat. Also as the spec sheets make clear, many of those devices become unstable at higher temps, often well before their rated limits. |
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It looks like having hardware errors on these erupters is pretty normal. Has anyone managed to get theirs to run 24/7 without any hardware errors? I am not sure its a heat related issue because I've attached some small heatsinks to the ASIC chip and have server fans blowing onto them, but still the occasional error.
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I have asked for KNC Miner reviews?? in my last post...
They haven't shipped products yet so how can there be any reviews? And borrowing money from friends for your investment sounds like a terrible idea. |
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No body likes my system? ;-(
It looks sleek. Can you fit more cards in it? |
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Nothing rare, but my two little USB erupters arrived today. Set them up on a shelf above my desk with a D-Link DUB-H7 7 port hub I got for $23. I quickly realised that they were reaching 70+ deg C temps when I was setting them up and the 2x 15 watt server fans really help (but they are running at 3.3 volts so they are essentially silent). Miners now get better temps of about 45 deg C (25 deg C ambient) after running for a while. Getting <1% hardware errors in bfgminer I might have to look at that later.
Is there any components on the other side of the PCB? Or is the aluminium heatsink removing heat through the PCB itself? Some micro-sized heatsinks might be in order for the ASIC chip on the top side in any case...
There were a couple of guys playing around with some clip-on heatsinks that reached the chips pretty nicely.. might be worth looking into. Just did a quick search but couldnt find the post . will look again a little later. Yeah, these https://109.201.133.65/index.php?topic=241652.msg2611270#msg2611270 |
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So I got my first erupters today and spent about 2 hours trying to take the advice in a bunch of threads about settings them up with cgminer. Silly me tried to set them up with the latest version of cgminer 3.3.1. Since the -S command was removed a few versions ago it seems like you are now supposed to get a perfect install of the drivers and then it magically detects the USB devices on start up. But this didn't work for me, and others in some threads had problems with this too. So I followed this guide http://rdmsnippets.com/tag/install-block-erupter-on-windows-7/ to the letter and used the older 3.1.1 and it worked more or less perfectly. Not sure how support for the USB miners will progress with new versions of cgminer. I suppose its best to just leave it alone since it works. Also I used the D-Link DUB-H7 hub and it works flawlessly. Running of my netbook (~13 watts) which runs 24/7 anyway, seems like a good host. Unless you have USB 3.0 hubs, you should have just followed the simple paragraph in the ASIC readme file and installed the WinUSB driver with Zadig and associate your USB Erupter with the WinUSB driver. I did that and had my Erupters running in minutes and has been running flawlessly since with no command line arguments besides --usb ICA:3 since I'm running three instances of CGMiner with 3 Erupters per pool. Much simpler than mapping all of those serial ports and putting each port/miner in the command line. Sam ASIC-README.txt in version 3.1.1 only refers to BFL and Avalon devices. I had a look in it but figured it was not relevant at the time. |
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So I got my first erupters today and spent about 2 hours trying to take the advice in a bunch of threads about settings them up with cgminer. Silly me tried to set them up with the latest version of cgminer 3.3.1. Since the -S command was removed a few versions ago it seems like you are now supposed to get a perfect install of the drivers and then it magically detects the USB devices on start up. But this didn't work for me, and others in some threads had problems with this too. So I followed this guide http://rdmsnippets.com/tag/install-block-erupter-on-windows-7/ to the letter and used the older 3.1.1 and it worked more or less perfectly. Not sure how support for the USB miners will progress with new versions of cgminer. I suppose its best to just leave it alone since it works. Also I used the D-Link DUB-H7 hub and it works flawlessly. Running of my netbook (~13 watts) which runs 24/7 anyway, seems like a good host. |
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https://i.imgur.com/xxZfMUV.jpg https://i.imgur.com/0m8XehV.jpg Nothing rare, but my two little USB erupters arrived today. Set them up on a shelf above my desk with a D-Link DUB-H7 7 port hub I got for $23. I quickly realised that they were reaching 70+ deg C temps when I was setting them up and the 2x 15 watt server fans really help (but they are running at 3.3 volts so they are essentially silent). Miners now get better temps of about 45 deg C (25 deg C ambient) after running for a while. Getting <1% hardware errors in bfgminer I might have to look at that later. Is there any components on the other side of the PCB? Or is the aluminium heatsink removing heat through the PCB itself? Some micro-sized heatsinks might be in order for the ASIC chip on the top side in any case...
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Hi, I got my block erupters and am mining at Bitminter because that was the only software I could get to work. I have read a lot about getting cgminer or bfgminer to run block erupters but I can't figure it out.
I have read this post and don't know how to add -G -S all to command line...what command line? How or where do I find or open the command line?
cgminer says create a shortcut,right click and properties, change target to C\cgminer.....SCOM3..so on, but it always says invalid path....
I want to try bfgminer if I can learn how to do the command line. Any help?
There are lots of ways you can do that. You can run the .exe from a batch (.bat) file that you've written which can execute many lines of commands for you. or You can type 'cmd' into Start->Search in windows and press enter, or if you have a very old windows (eg. XP) you can use Run and type cmd. This will open a new command prompt with the default directory. or You can go to the folder containing the .exe file and hold shift and right click the folder, you should see a usually hidden option "Open Command Window here". or Or, you can make a shortcut to the .exe by right clicking on it / create shortcut / send to -> desktop and then going rightclick->properties on the shortcut. In the Target: field you can put arguments eg: C:\terracoin-qt\terracoin-qt.exe -server -datadir=S:\Terracoin is just an example of how one of my clients is setup. You can use the arguments for your mining software in exactly this way too by placing them after the .exe's path. The "Start in:" field on the shortcut properties should be unchanged, in this case it is: Alternatively cgminer can be set up to load its settings from a config file that can be created by running the .exe directly and then following the GUI prompts, then saving the config file by pressing "S" -> "W" -> "ENTER". Next time you load the .exe it will look for the config file you saved. It also appears bfgminer can be setup to run with a config file such as was shown above by ssateneth. |
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Slight problem though: the ATO doesn't care what you or I think bitcoin (and the other cryptocoins) are or are not. If they audit you then only their interpretation matters.
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There are lots of these kind of co-processor boards made by different (usually small) companies that deliver ~1TFLOPS / OPS but I am yet to see anyone write software to run them for mining. You should flog it in eBay and buy a 7950 or ASIC miner  |
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You are already getting the 'max' out of that thing.
Overclocking these miners has been discussed in depth before in many other threads, tl;dr you would need to completely redesign the entire device because 1. it uses a fixed clock to control the ASIC's frequency and 2. the power circuitry is only sufficient to power it at it's 'stock' speed.
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OK but I'm solo mining and pool 0 is localhost, why would it be different from the pools 1&2 in any case? The other pools are to provide new block detection only. I believe that the pool minimum share difficulty is another thing entirely, and you can see in the images they are reporting values of 4 and 32. I occasionally (5% of the time?) see different numbers in the top of the miner (but each diff value is always in the tens thousands) however most of the time they are identical. 68 is essentially nothing compared to 19,600  And why 68? Why not 42? "Network diff set to 68" sounds as if that instruction was sent by terracoin-qt not from the pools. Why would it think 68 was the network diff? |
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I have been watching my client do this for a few hours now: https://i.imgur.com/G1X540j.png Looking near the top of the window, it appears to me that the 'network' thinks the diff should be 19.6K but the client believes it is 68. It always oscillates between a realistic difficulty and 68, always 68. When it changes to 68 it often claims to have found a block. The found blocks are not accepted by the client or any pool and neither do they appear in my client when I use listtransactions, as they usually would if they were orphans. https://i.imgur.com/lt9fcSZ.png Here you see it found a block... but it does not display the usual 'accepted' message on the next line. It is as if some kind of disconnect is occurring between terracoin-qt and cgminer. I am using the following settings, if they stick out as potentially related... please let me know. "expiry" : "2",
"queue" : "0",
"scan-time" : "2", Restarting client / miner / computer makes no difference. Does anyone else get this behavior in their miner or is just me? |
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Mining with Nvidia cards uses more electricity than you'll earn from mining, it is strongly discouraged in general.
You're far better off buying some BTC and playing the market.
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Where are you able to get those eruptors?
The group buy subforum? |
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