It sounds too good to be true: start Bitcoin mining and get rich doing nothing. There has a been a lot of fuzz in the media about Bitcoins lately and this may have sparked the desire in you to get crypto mining. This blog is meant as a quick guide to get you up to speed, giving you a realistic view on what crypto currency mining is about. You'll also learn about some common mistakes to avoid which you won't find in the sea of shallow media hyped articles out there. Should I buy hardware to start Bitcoin mining now? People are getting rich!No. Obviously a lot of people have become rich Bitcoin mining or trading, some will say it was luck some will say they knew Bitcoin was going to go up like it did. The recipe for success in Bitcoin mining has been simple (as always in Hindsight): start mining/buying early when nobody believes Bitcoin will have value in the future and wait until Bitcoin becomes popular and expensive. Right now I'd say forget about Bitcoin mining with your own hardware; this has to do with the algorithm (SHA-256) Bitcoin uses that makes it possible to develop Bitcoin mining hardware which doubles the hashing/mining speed every month on average. You may have heard of FPGA and ASIC terminology used to describe fast Bitcoin mining hardware. Because of the way Bitcoin is designed this cheaper/faster mining for everyone results in a steep monthly increase in Bitcoin mining difficulty (see chart to the right); this makes it hard to break-even on the hardware you purchased let alone make a profit.  It's a rat-race in which I don't think can be won anymore: the first person who has fast hardware makes a lot of money for a while until everybody has fast hardware and new faster hardware comes out. Basically the scenarios which allow you to become rich if you start mining Bitcoin with your own hardware now:
Does that mean there's no money to be made in Bitcoin anymore?No. You can still make money by trading Bitcoins or buying hashing power from could hashing platforms. However, I wouldn't recommend it personally. The only way to make (a bit) of money is to buy low and hope for an equal or preferably higher Bitcoin price in the future. People who bought hashing power (or outright Bitcoins or other Bitcoin securities) at the high of 1200 USD/BTC will not be making profit now that BTC is at around 600 USD at the time of writing. That being said, as always in trading with patience the BTC price could sky-rocket again. There are people out there saying Bitcoin will go to 40.000 USD/BTC. Unfortunately they do not specify whether that will happen because of hyperinflation of the USD or hyperdeflation of the BTC ;-) So, Mr. Megahard what do you recommend as an investment now?Scrypt mining! So the main problem in BTC mining is the exponential growth of the difficulty. Lets try to put that in normal English again: with the same hardware you'll be mining 2 times less "value" than whatever you mined in a previous month (assuming Bitcoin doesn't change in value). This is essentially due to a "hashing algorithm" called SHA-256 which Bitcoin uses. However a lot of other crypto currencies exist which use different algorithms. Most notably currently is an algorithm called "Scrypt" which is what is used in the popular Litecoin currency. Mining a currency using this algorithm is therefore often referred to as "Scrypt mining". This algorithm basically makes it very hard for hardware engineers (like me) to develop more efficient mining hardware which beats mass produced PC video cards in mining performance. There are currently no FPGA or ASIC implementations on the market for Scrypt mining which can beat videocards in terms of price, energy usage, hash rates or availability.  Because in Scrypt mining everybody uses standard mass produced PC hardware, everybody is mining along with similar investment costs per mining speed (expressed as "hash rate"). This results in a difficulty factor for Scrypt mining which has not increased exponentially since the existence of Scrypt currencies. The difficulty factor and value of some Scrypt currencies (like Anoncoin) have remained quite stable, while that of others like the popular Litecoin have increased linearly with popularity and buying power, yet not exponentially like Bitcoin did. This tells you that when Scrypt mining with certain hardware, the amount of buying power you generate remains quite stable over time compared to Bitcoin mining with Bitcoin mining hardware. This makes investing in Scrypt mining hardware a little less risky and less stressful. Less stressful because it doesn't really matter all that much whether you start mining today or in a month from now (which in Bitcoin mining can easily make the difference between profit or loss). For now that is. For now, because companies are reportedly working on FPGA & ASIC Scrypt mining rigs which consume less energy than off-the-shelve video cards. While there are without a doubt people out there who are trying to build and sell FPGA Scrypt mining machines, at the time of writing there are no FPGA scrypt mining machines on the market and the companies working on them have no track record and thus no proof of actually being able to sell FPGA Scrypt mining machines. On top of that scammers are popping up claiming to sell FPGA Scrypt mining machines or cloud hashing. This doesn't help the credibility of FPGA Scrypt mining rigs commercial feasibility and that brings me to warning #1: don't believe people who claim to sell working and efficient FPGA Scrypt mining machines right now! If you're interested in knowing more about the status of Scrypt specific mining hardware, check out the Litecoin forums for an example of some guys working on ASIC hardware, which they'll initially sell hashing power off of. While they seem credible; keep your guard up, it's a weird business known to attract a lot of scammers. The way things look right now (December 2013) personal mining rigs can actually be quite a good investment with a break-even time of around 4 to 8 months (depending on your investment and the energy prices where you live). I make this statement with a few important assumptions which are the following:
As with every investment: there's a risk of making a loss. You won't loose the computer you invested in, but you could still end up with a loss caused by the energy bill necessary for mining. If you want to know what you'll be earning and spending on electricity bills while mining, some nifty calculators exist on the web. They take the current real-world mining parameters such as difficulty, block reward, energy prices and your hash rate (hardware performance) as inputs and give you net income as output. Keep in mind that these parameters DO NOT remain stable over time and are not predictable: value of coins change, energy prices change and mining difficulty factors change over time. You'll have to make a prediction of how you think these parameters will change in the future and decide to start mining or not based on that. Interesting websites to check out when calculating your future riches:
Sounds good! I want to get my own Scrypt mining rig RIGHT NOW! How do I get started?The short answer: get yourself a mining rig, plug it in and GET MONEY... and... don't forget to read the long answer first. As always the devil is in the details and getting the right rig is the devilish detail in this case. Sorry. Picking a video card for Scrypt miningFor this bit of blogpost I'm assuming you're capable of building your own PC. If not, you may want to look into Webshops which specialize in selling Scrypt mining rigs. The most important part of a Scrypt coin mining rig is the video card. The rest of the PC doesn't really matter: you can buy cheap on all other parts, just make sure your power supply is large enough to power all the video cards you're planning on plugging in. You can get an idea of hash rate performance of video cards at litecoin.info (or Google your currency of preference + "mining hardware"). For some reason AMD Radeon cards perform way better than any Nvidia cards, so forget about mining with an Nvidia card unless of course you already own one anyway. A popular model used in mining right now is the: Radeon HD 7950. DO NOT just buy the cheapest most available AMD Radeon video card you come across: not all brands of a certain model are suitable for Scrypt mining. No video card currently on the market has been specifically designed towards Scrypt mining, this means that you'll have to select a video card which "accidentally" happens to have been designed right for the Scrypt mining job. Use forums like bitcointalk to check whether the video card you're thinking off has any problems. Another good way to find out whether a certain brand is any good is googling for something like: "Radeon HD xxxx *brandname* bad hash rates scrypt mining". The consequences of picking a bad video card brand are as follows: very high videocard temperatures causing your PC to freeze or restart itself when mining, very high energy usage per hash and horrible hashing rates. If you're a nerd like me additional disadvantage of a "bad card" would be that there is no way to "tweak" your card to get higher hashing rates, lower temperatures and/or lower energy usage. In other words: choosing a bad brand makes the difference between a potentially viable investment or a useless horrible investment for mining AKA a loss. Video card brands to absolutely avoid at all cost are: XFX, Powercolor and 3D club. In any case; always check thoroughly whether the card you want to buy is suitable for mining. You'll no doubt notice that the videocards suitable for Scrypt mining are also the ones that are often sold out. This is due to the high demand in those cards for Scrypt mining. Get miningOnce you built your PC you can start mining in your OS of choice. There are guides out there that explain how to mine under Linux if you're into that. Mining software can be found in the hardware overviews. Hint 1: be aware that the popular CGMiner software only supports Scrypt mining up to version 3.7.2 (the newer versions dropped support and will do "nothing" when you try to Scrypt mine). When you've got all your hardware and software ready to go, you'll want to register at a mining pool of your choice (just Google one and sign up). You'll create a "worker" on the mining pool website of choice. You'll need the worker name + password as parameters to the mining software, the pool website should have a little guide explaining you how to input these parameters into the mining software. Hint 2: either use mining software with a graphical user interface like GUIminer in combination with CGminer or create a *.bat file where you store all the parameters you input to the program. This will make starting and restarting the software with all your parameters of choice much easier than inputting everything by hand every time you start the miner software. Serious mining rigs (more than 2 video cards) As you get into Scrypt mining you'll notice people are going quite crazy building huge rigs to try and make a living off of mining alone (or trying strike it rich). 3-card rigs are pretty common, but how do you actually fit 3 cards in a standard PC-case? Well... you can't really; standard ATX cases don't have enough room to plug 3 or more of those large video cards into them. To do so, you'll need something called PCI-E risers.PCE-E risersThe risers basically come in 2 types: 1X PCI-E to 16X PCI-E (powered and unpowered) as well as 16X PCI-E to 16X PCI-E. Scrypt mining is not data intensive, which is why the 1X PCI-E will work just fine. Keep in mind that there can be video card detection issues when using the 1x PCI-E riser cables. Check out this website for more info on this. The easiest way is basically to go for 16x to 16x risers. Don't be surprised if these risers are hard to get right now. Like with the availability of video cards this is due to the popularity of Scrypt mining, I myself can actually not seem to get my hands on them where I'm currently based (The Netherlands). ConclusionSome call it a pyramid scheme, some say it's the currency of the future, I say: get informed and decide for yourself. Personally I feel Scrypt-based currencies are currently a nice way of at least (probably) breaking even on a high-end nice gaming-PC, with a good chance of making profit or even getting rich like the early Bitcoin buyers and miners did. At the very least it's an exciting gamble! And if you decide to make your living out of it, that would be an extremely exciting (scary?) gamble. I say, happy mining, happy Christmas and a happy new year! And contact me with any comments or questions you may have!  And here's another example of a crazy mining rig (source: ecoinomist.com) |
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