Bitcoins Mining - so geht's - CHIP

To arms Bitcoin community! Help us to complete this mining installation for the Zürich MoneyMuseum. We are not asking for funds. Only your expertise needed! 20$ tip if you give us the relevant clue to solve or mitigate our main problem. Nice pictures of the exhibition inside as well…

Edit:
A big thank you to all people who helped us we can now mine true pps with diff1! The people in this thread which have helped most have been awarded. I want to mention also the operator of btcmp.com denis2342 and Luke-Jr.
Actually looking at the miner screen in the Linux terminal helped a lot ;-). The pool constantly resigned to stratum with variable difficulty. We can now mine true pps with diff1. Getwork with long polling seems to be default after disabling stratum...
We will probably post again, when there is a video of the installation in action...
Again many thanks. Learned a lot.
Edit: Thank you for all the answeres so far! We will try different things now and report back. Tip bounty will be distrubuted as soon as we found out what finally does the trick. Ths could take a few days. The offerd tip will be distributed and very likeley a few others as well.
First of all, let me tell you that the Bitcoin Exhibition at the Zürich MoneyMuseum is most likely the biggest and most diverse of it’s kind. Please read more about the museum and the exhibition below.
Help us solve the following problem we experience with our “Muscle Powered Proof of Work” installation:
Me and a friend have invested a lot of time to build an installation for the Museum. It is basically a 10GHash/s miner and RapberryPi which is powered by a hand generator (Maxon DC motor with planetary gear). Here are some pictures of the installation, although not entirely put together yet. There are still some changes planned.
https://www.dropbox.com/sh/0qcvl3wu4romhnt/AAAYF08lnVAy6W6KEepE7e2Ua?dl=0
Now let’s get to the core of our problem:
We are mining at the getwork diff1 pool btcmp.com as it is a true pps pool with getwork diff1. The visitors in the museum can power the generator for 2-3min and see directly how many Satoshis the "network" (actually pool but we don't want to confuse the visitors to much at that point) has given the museum for their work. This all works well so far but one problem remains. Sometimes the pool does not get a share from us for more than 40 seconds or even more than 60 in some cases. I have calculated that with 8.4 GHash/s we should find a share about every 0.5 seconds in average (diff1). I think when the pool gets a share it gets all the hashes as it then accounts for several Satoshis. Statistically we get per minute what we should get in theory. We would very much like to lower the time between the accepted shares by the pool, however. This would help to make the overall experience much smoother for the visitors.
Please look at this screenshot from MinePeon and answer some questions:
https://www.dropbox.com/s/lb1jei4trc9kqe5/MinePeonScreenshot.png?dl=0
We see that we get a lot of diff1 hashes. However, only 11 shares/packages have been accepted. The Is there a possibility to set the miner SW so it submits to the pool as soon as a share is found? It seems to send them in packages which sometimes have 4-5 seconds in between but sometimes a much as 80 seconds. I would like to submit packages of hashes much more often. How can this be influenced?
What exactly are the Getworks (GW)?
What exactly are the Accepted ones (Acc)? This is where the TipBounty is. Help us to get a better Acc/diff1 ratio. Best would be 1:1.
What exactly are the rejected ones (Rej)?
What exactly are the discarded ones (Disc)?
What exactly are the difficulty one hashes (diff1)?
Now some of these questions seem very very basic but it is important for us to understand what these are and how we can influence these. We have a 1:1 correlation between the Acc and the pool side acknowledgement of shares/packages. So whenever the MinePeon shows one more for this value the pool value for last submitted share goes to “moments ago”.
Does the miner SW have a setting where we can set after how many diff1 hashes a package of hashes is sent to the pool? If no, do you have another idea why so few are sent? Ideally we would set it so the diff1 hashes are sent every 5 seconds or so, probably even more often.
Is stratum with fixed diff1 possible? If so, would it be better to use stratum?
Are there critical settings if we should know of? (we have tried --request-diff and --no-submit-stale)
We are using BFGMiner on MinePeon if that matters. We could switch to CGMiner if that would help. Any help is very much appreciated. The museum is doing a great job explaining Bitcoin basics. We had special focus on interactive learning and have several things to underline this.
I hope to hear back from you so we can improve our installation. Please don't hesitate to ask if you have further questions. We are both not mining experts.
Thanks for reading and AMA.
SimonBelmond
Current features of the Bitcoin exhibition at the Zürich MoneyMuseum:
Current Features:
  • Life screen with various stats/charts/parameters/transactions…
  • Printed infographics.
  • Muscle powered PoW: Hand generator with 5v and 3.5-5A output, Raspberry Pi, MinePeon, 5x Antminer U2+ plus a screen to show the hash-rate at the pool and/or in MinePeon web interface. This screen will not be hand powered. This installation will complement their coining die (go to 1:27 to see what I mean).
  • The Bitcoin mining evolution (CPU, GPU, FPGA, ASIC)
  • A few short (2-3 minutes) interviews.
  • Other wallets, Trezor, PiperWallet
  • ATM Prototype, functional
  • MoneyMuseum Bit-Cards
  • PiperWallet to use.
  • Casascius and other physical Bitcoins, Wallets (also some commemorative coins), Paper wallet like one out of the first Bitcoin (A)TM ever
  • Bitcoin Quiz
  • 12 Picture tours
    • Bitcoin for beginners
    • Bitcoin advanced
    • Debunking 13 Bitcoin myths
    • What you definitely have to know
    • The history of Bitcoin
    • Bitcoin und traditional forms of money
    • Alternatives to Bitcoin
    • Citations about Bitcoin
    • How do I open an account?
    • How do I get Bitcoin?
    • Bitcoin community and economy
    • Bitcoin as a platform
I see this as a good opportunity for Bitcoin, so let’s embrace it. I am especially excited to compare the traditional forms of money which used proof of work to the new money which also uses proof of work. I think in that context it will be much easier for the visitors to value this concept.
A lot of schools and other groups book guided tours at the museum. It is open on every Friday from December 05. On. Entry is free of charge.
Edit:Markdown, typos
submitted by SimonBelmond to Bitcoin [link] [comments]

[modpost] Possible wiki page, something I call "All about miners," covering things from basic terminology to miner config files and overclocking.

What is a miner?
A miner is a computer set up to solve cryptographic hashes in the litecoin network. Once a clump of these hashes, or a block, is mined, litecoins pop out! It's like opening a box of chocolates, except you know what you're gonna get :) Miners also handle transaction confirmations, making sure no single coin is double-spent.
Setting up your computer to be a miner
What kind of computer do I need?
Optimally, you'd have a good power supply and a couple decent Radeon/ATI/AMD graphics cards. Because of litecoin's hash algorithm, the gap between mining with graphics cards and processors is less than with most other cryptocurrencies, meaning that mining with some desktop processors may be worth it after electricity costs. Note that mining with laptops is not recommended because of the heat generated by mining, and mining with NVIDIA graphics cards may not be worth the cost.
How do I know if litecoin mining will be profitable for me?
First, check how fast you'll be mining with your hardware, how many litecoins you'll mine in a day, and how much litecoins are worth. Now, multiply the number of litecoins per day by their worth. Then, find out the power draw of your hardware, and calculate energy cost. Then finish by subtract energy cost from your daily earnings. If your number is positive, you're making that much money per day. If negative, you're losing money.
Keep in mind that the worth of litecoins goes up/down, and you have to earn the cost of your hardware before you churn a profit. Mining difficulty also goes up/down, depending on how many people are mining how fast in relation to how many litecoins are supposed to be generated how fast. See the economics(coming soon) post for more info.
Okay, I did all that. How do I start?
All you have to do is download a program and change some settings (later in the guide), and you're ready to go. If you're comfortable with configurations and the command line, Reaper and cgminer are your best friends. Otherwise, GUIMiner-scrypt is right for you. If you want to mine on your processor, download the "batteries included" miner via this link and setup should be relatively self-explanatory.
Do I mine alone?
Due to the difficulty of mining, we recommend that you mine with a pool where multiple people mine together. Visit your pool's about or help page for proper miner settings, which we're about to get to in-depth!
Under the hood
Configuring your miner (aka the hard part)
Before we get started, you should become familiar with these terms:
None of those will have any affect on how fast you mine. The settings that we'll be focusing on are:
If you're using GUIMiner-scrypt, there are default settings for different cards (lower right dropdown). I'm mining on a 7870. Here is what it looks like for me. You can follow along with the rest of this guide to optimize your settings. GUIMiner-scrypt is just a GUI to cgminer and reaper anyways.
If you are using a command-line miner, like reaper and cgminer, I recommend you download and isntall Notepad++ or SublimeText if on Linux.
Reaper is currently considered to be the best tool for mining. After you unzip your downloaded file, in the folder you'll find reaper.conf. It should look something like this:
kernel reaper.cl save_binaries yes enable_graceful_shutdown no long_polling yes platform 0 device 0 #mine bitcoin mine litecoin #mine solidcoin 
This will make it mine litecoin on your first graphics card and reference litecoin.conf, which for me looks like
host us-pool.give-me-ltc.com port 8080 user poolusername.1 pass anything protocol litecoin worksize 256 vectors 1 aggression 18 threads_per_gpu 1 sharethreads 32 lookup_gap 2 gpu_thread_concurrency 15380 
As you see, my thread concurrency is slightly different from the default of GUIMiner-scrypt. I found that this concurrency gives me the best hashrate!
NOTE: I do not use cgminer to mine litecoin. If you plan on using cgminer, which offers more hardware-controlling settings, in the cgminer folder you will want to create a text file. Then, open that text file w/ Notepad++ or SublimeText, then Save As > cgminer.con > file type > all. This will save the file with the proper name and as the proper type. Note that cgminer does not support high concurrencies. For me, cgminer.conf would look something like:
{ "pools" : [ { "url" : "XXX", "user" : "XXX", "pass" : "XXX" } ], "auto-fan" : true, "gpu-engine" : "920", "gpu-fan" : "0-100", "gpu-memclock" : "1375", "gpu-powertune" : "20", "gpu-vddc" : "1.219", "temp-cutoff" : "85", "temp-overheat" : "80", "temp-target" : "75", "temp-hysteresis" : "3", "kernel" : "scrypt", "gputhreads" : "1", "thread_concurrency": "8192", "worksize": "256", "intensity" : "dynamic", "vectors" : "1" } 
You saw some settings similar to what we saw in Reaper's litecoin.conf. The other settings have to do with my card's clocks, voltage, and fan. This is covered in the overclocking section right below!
Overclocking (aka the risky part)
Okay, first off I'm not responsible if you cause damage to your parts. Please research safe overclock settings for your card. Second, don't be afraid. Modern hardware has many safety features in place that help prevent mayhem like me...lol jk this isn't a car insurance add. For your better understanding, become familiar with these terms:
No one setting controls how effectively you mine; what matters most when it comes to clocks is the ratio between your core/memory clocks. Generally, a ratio of 0.7 or below is best. You will need to experiment. If you're using cgminer, you can control card settings from the conf file. However, if you aren't, I recommend using MSI Afterburner as your overclocking tool. You will need to unlock some settings. Using my cgminer settings, MSI Afterburner looks like this. I have found these settings to be the most stable while bringing me a high hashrate.
Other people's optimum settings
You can check the sidebar for the hardware comparison chart, but it is rarely updated and has huge sways in results. It is a good starting place. The mods of this subreddit will be putting together an updated, more accurate list in the near future.
END
I hope all things go smoothly for you and that you've learned a lot! Please consider donating LTC to
My wallet: LiD41gjLjT5JL2hfVz8X4SRm27T3wQqzjk
The writer of the [Consolidated Litecoin Mining Guide] which helped get me started
The writer of the [Absolute Beginner's Litecoin Mining Guide] which also helped me get started
submitted by mycomputerisbacon to litecoinmining [link] [comments]

Getting only around 130Kh/s with my HD7870.

Hey there helpful shibes,
I have a problem with my mining setup.
Looking at this chart for litecoin mining: https://litecoin.info/Mining_hardware_comparison My 7870 should at least be getting me 300Kh/s depending on the version, I have the XFX Radeon HD 7870 Double Dissipation Black Edition.
I have already done my fair share of googeling for solutions, and I have tried so far
Also bitcoin mining using GUIminer worked perfectly getting me around 400Mh/s.
Thanks in advance.
Edit: Now using two threads and getting around 250Kh/s, still not perfect but a huge improvement.
submitted by Spaghettisuprise to dogemining [link] [comments]

CGminer Automatic Start on Windows BITCOIN Mining LiteCoin with GPU use cgminer-LTC - YouTube Cgminer Scrypt Mining Tuning (Overclocking) GPU Raise Hashrate Tutorial (Litecoin, Feathercoin, etc) tutorial: Bitcoin mining with CGMiner - YouTube Litecoin Mining Tutorial BFGMINER

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CGminer Automatic Start on Windows BITCOIN

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