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Just some math for those buying these miners. I was thinking of buying 100 USB Eruptors for .32 BTC each (so 32 BTC in all). That would require 10 hubs so assume another 2 BTC expensed there so 34 BTC on all which is now about 3400 USD. The latest difficulty increase is in and we went from 26,160,000 to 50,810,000 in 30 days (from 7/14 to 8/13). This is a monthly increase of 94% - completely insane. This will probably continue for a few months and then drop precipitously once all these new 28nm ASICs come online in the first few months of 2014. Assuming a continued 95% increase per month difficulty increases (a likely scenario for the next several months with all the new hardware coming online). With a USB hub, 10 usb miners plus hub consume 330W/hr. I took my power costs in the US at 0.11 USD per kwh and plugged it in. Not only will you lose money but at a 95% month over month difficulty increase, these miners will only produce 18.65 BTC (out of 34 BTC invested) in 24 weeks before becoming unprofitable to continue running. A pretty big loss. In fact, in order to EVER break even on this investment, you have to assume the month over month difficulty increase will drop down from 194% to 30% to ever break even. A very unlikely scenario. If you do not pay for your power (live in a dorm) then the situtation only a little less bleak. You can break even if month over month difficulty increases drops to 35%. Also very unlikely. Here is where I get my #s: Historical Difficulty increases: http://mining.thegenesisblock.com/95% month/month diff increase calculator: http://btcinvest.net/bitcoin-mining-profit-calculator.php?diff=50810339.048276&dcosts=3400&diff_mincrease=95&blpbtc=25&dhsmhs=33400&btcusd_mincrease=0&btcusd=100.00&dpowcon=330&dleadtime=0&pcost=0.11&calcweeks=25&action=calc30% month/month diff increase calculator: http://btcinvest.net/bitcoin-mining-profit-calculator.php?diff=50810339.048276&dcosts=3400&diff_mincrease=30&blpbtc=25&dhsmhs=33400&btcusd_mincrease=0&btcusd=100.00&dpowcon=330&dleadtime=0&pcost=0.11&calcweeks=56&action=calcConclusion: Do not buy USB eruptors or the Old Blades if you wish to make a profit. Your only hope of making money mining is to pre-order some vaporware from hashfast, cointerra, or one of the other 28nm newcomers and pray they are not a scam and can deliver on time. It is much safer to simply buy ASICMiner stock than the hardware! The numbers for a blade are no better. Only will break even if difficulty goes up to only 35% month over month at stock speed. Overclocking brings that down only a little (still over 30% difficulty to break even), since significant more power is used for cooling and overclocking (and you need to pay for a cooling unit upfront) http://btcinvest.net/bitcoin-mining-profit-calculator.php?diff=50810339.048276&dcosts=1025&diff_mincrease=35&blpbtc=25&dhsmhs=10752&btcusd_mincrease=0&btcusd=100.00&dpowcon=75&dleadtime=0&pcost=0.11&calcweeks=100&action=calcI agree!!! How do you buy ASICMiner stock than the hardware! Thankyou. |
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Are you using bitminter program Thankyou. |
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I'm giddy as a schoolboy. Just got all my USB Block Erupters set up and hashing. Just had to share this here.   I'm likely using the same hardware that you have. Can you (or have you in another thread?) let us know what software you are running these with? Are you on a windows machine? Thanks in advance! judging by the picture its cgminer 3.1.1 (bitminter) and .bat would indicate windows I have (12) asic erupters. I have Windows 8. Could you give me instructions on how to set up cgminer 3.1.1 with the asic eupters. Thankyou. |
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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. How do you create a desktop shortcut. I know how to copy and paste and get my com numbers like below. I just do not know how to make a command line on my computer from the example below Thankyou. STEP 5: Create a Desktop Shortcut. To launch cgminer, create a shortcut with a target command line that looks like this: C:\cgminer\cgminer-nogpu.exe -o [pool]:[port] -u [username].[worker] -p [password] --icarus-options 115200:1:1 --icarus-timing 3.0=100 -S //./COM3 -S //./COM4 -S //./COM5 -S //./COM6 |
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I have windows 8
I am only using usb asic erupters.
The only Bitcoin mining pool I have gotten to work is bitminter.
Will the Anker hubs that I am using with the usb asic erupters only do bitminter.
Thankyou.
They should work for any pool that you can mine SHA-256 algorithm coins on. You can even solo mine with them, but that would a bad idea for BTC unless you have hundreds of gigahash/s of erupters. The hubs will either work with your OS and mining software or they will not. The pool doesn't really have much to do with it as far as I can see. I need a Windows 8 instructions on how to get the usb asic erupts to mine using cgminer Thankyou. |
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I have windows 8
I am only using usb asic erupters.
The only Bitcoin mining pool I have gotten to work is bitminter.
Will the Anker hubs that I am using with the usb asic erupters only do bitminter.
Thankyou.
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os2sam
It is a Anker Uspeed usb 3.0 10-Port Hub with 12V 4A Power Adapter.
what do you mean by daisy chain them
Thankyou.
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Thanks for such a good thread and informative posts!
I'm getting the gear together while waiting for 10 Erupters to arrive, and have a very noob question. I've looked around but can't find an answer.
I'm not sure how the miners work so don't know whether there is any advantage of using USB3.0 vs UCB2.0 hubs. (for running 10 Erupters of a USB hub or two). I'm guessing no, but to be sure...
No there is no advantage to USB 3.0 vs 2.0. These are USB 1.1 devices. If you plan on using CGMiner DO NOT get USB 3.0 hubs as that support is still in development. What you need to pay attention to is the Power Supply of the USB Hub. People have been using the Anker 10 Port USB 3.0 hubs because they have a 4 Amp power supply so they can put 8 Block Erupters per Hub. I am using 7/5 Port Rosewill USB 2.0 Hubs which have a 2 Amp Power Supply so I can put 4 Block Erupters per Hub. Each Block Erupter draws .5 Amp. So unless you modify a Hub you cannot put 10 devices on a 10 Port Hub, not safely/reliably anyway. I have (2) Anker 10 port 3.0 usb hubs. I am going to put 8 usb erupters on each hub. I have a Lenovo H520S that I bought from Newegg. Can I only put (2) 10 port 3.0 usb hubs on one computer. Thankyou. |
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I need help on how to sign a message on bitcoin wallet 0.8.2.
Thankyou.
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I think I'm going to hold steady with the 27 I bought lol. Can't wait for my shipment to get here Thursday  Everything is already wall mounted. I had to use electrical tape paint over the LED's on those anker hubs because they are INTENSE.  Where did you buy your anker hubs from. What is the part number. Also what is the name and part number of your usb fan. Thankyou. |
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I couldn't agree more. I've been a member on this forum for a few weeks and I STILL can't post outside this stupid sub-section!
+1 I read hundreds of pages on this forum, I learned hundreds of things, and I do not have many interesting things to post, since I am a newbie ... So I can not request information on a buying group that would interest me ( https://bitcointalk.org/index.php?topic=177994.0). This seems strange to me. I am not a big poster either. I am trying to get in on a buying group also |
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It negatively affects crowdsourcing. You have people all over the internet linking to a specific forum. Any of a thousand thousand people might stumble on a particular thread in this forum. A person with crucial insight or knowledge on the issue at hand might look for the reply button, in eager anticipation of his stunning ability to dazzle people in this particular area of expertise.
Bewildered by the lack of reply-button he might think that signing up will grant posting privileges. Once this does not pan out he will eventually either leave or end up finding the newbie section and all these procedures for getting in. Upon seeing all of this hokey stuff, the person will then make a second decision, to put up with it and either keep posting (four hours five posts and all that) or stand at the mercy of an admin being willing to post his comment (which, in contemplating spending 30 minutes writing a post, might be too much of a risk).
No, more likely - and especially if this is a busy person with other, more important things to do (unlike me, etc.), the person will simply leave the site and never bother with it - until the cycle repeats the next time his knowledge and insight is occasioned by a link to this forum.
We might miss some good people this way, but I believe it cuts out more useless people than deters good posters. I agree |
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Still, spammers will post in the newbie-section and say something like "Cool Story" or anything useless (I saw that yesterday). They might even use the background color for the font color and put in some hidden text (seen on the forum I moderate on so many times) linking to some of their darn websites.
Anyway, 1 hour and 23 minutes to go for me till I can post something useful and/or buy something from one of the members. When buying, I like to use a moderator/admin from this forum to do the transaction but what would the cost (%) be?
I cannot wait to post to bitcointalk forum. A lot of interesting facts in here. |
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Anyway, 1 hour and 23 minutes to go for me till I can post something useful and/or buy something from one of the members. When buying, I like to use a moderator/admin from this forum to do the transaction but what would the cost (%) be?
Cost % for doing escrow? I know John K does it for whatever people tip, usually 1-2% (i think?). I would do the 1-2% escrow |
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I spent a lot of time here in last few moths and I have never feel a need to register here or post something. I'm not good in writing anyway. But today I have found an auction on this forum I would like to participate. But I cant as I have to write another 4 useless posts before I can put my bid...
Well if you read what I wrote right above your post, you could have PMed me and asked to be whitelisted to post in an auction. Or you could just PM the person running it and ask them to put in a bid for you (probably the better option). I did not know I had to post in newbies section in order to post elsewhere. |
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