Mining Bitcoin With a 1985 Nintendo Entertainment System. Lastly, another neat project is another incredibly slow miner built in 2013 out of a 1985 Nintendo Entertainment System (NES). The creator of the NES mining system was joking around with his friend about mining bitcoins with an 8-bit game console. Well, he took that as a challenge and built a Nintendo that communicated with the network and performed SHA256 hashing. For other portions of the project, he did need a Raspberry Pi for computing that did not take place on the NES. "SHA256 hashing uses many 32-bit operations, and the 6502 in the NES is an 8-bit CPU," explains the retro miner creator. "Initially I thought this would be a significant challenge, but with some modifications, I got an open implementation of SHA256 to compile to a 6502 target using the cc65 compiler." The Raspberry Pi gets a chunk of data, compiles it into a ROM that includes the SHA256 algo and current target data, and sends it to the console via USB CopyNES. Each ROM computes and tests a single hash. In the end, the NES miner worked and started searching for blocks with Slush's pool, but the creator said there was plenty of room for build improvements. "What I'm doing now is very slow, and I admit, pretty lame," explains the retro miner's blog post. Additionally, bitcoiners have had great discussions concerning mining bitcoin with other gaming consoles like the Playstation 3. ASIC Producers Don't Need to Worry About Retro Miners. Obviously, these types of projects won't be mass adopted to mine excessive amounts of bitcoins like ASICs because it would take many lifetimes to find one block using a retro device. However even though watching an older computer or gaming console mine bitcoins is super slow it's very interesting to see that these devices are compatible with the Bitcoin network. What do you think about people testing old computers and retro gaming devices with the Bitcoin network? Let us know what you think in the comments below. Images via Pixabay, Wiki Commons, and Ken Shirriff's blog. Start Bitcoin mining Today! Hashrapid was established in 2019, endeavoring the vast range of possibilities with modern asset management via our mining bitcoin to serve investors for making the best investment holdings and maximize passive income. If you are looking for passive income or want to multiply your bitcoins, don't waste your time and start Bitcoin mining today with Hashrapid! Choose your plan. Check out our Mining Plans and choose the best option for you. Once your payment is confirmed, you'll start mining immediately. 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RAM(random access memory) is basically your computers short term memory storage so that it can readily access information needed to run applications faster. As a rule of thumb the more applications you plan on running on your device the more RAM is required to maintain fast response time from the computer. Does RAM matter for mining? This size of RAM you use on your mining machine does not have a direct impact on mining performance in most cases. However, there are some guidelines such as minimum OS requirements and motherboard form factor that must be followed to ensure your mining rig runs stable. So in this guide, I will discuss and answer(to the best of my knowledge) some of the more common questions that get asked from newcomers looking to start building their own mining rigs. Is 4gb Ram Enough For Mining. The size of RAM you will need will ultimately depend on the operating system you choose to run your mining machine on. Some miners claim that 4GB is big enough to run Windows 10 while some say get the 8GB and thank your self later. As for my honest opinion, I say get the 8GB over the 4GB when it comes to Windows 10 and for a few good reasons. The main reason being that if you choose to skimp on RAM you may be faced with lag issues that can make your operating system run slow. For example, let's say you installed 4GB of RAM on Win10 and you want to open MSI afterburner at the same time your rig is mining Ethereum. You may notice that the program takes forever to open or is sluggish and that's because of the mining software and many behind the scenes processes that Win10 runs are maxing out the RAM capabilities. Although this problem may sound small to some miners it can be real time consuming when managing multiple rigs, especially when trying to overclock and change out mining software. As for Linux based mining operating systems, it appears 2 to 4GB is optimal but I again I say get the 4GB. So as it stands for max performance 8GB on Win10 and 4GB on Linux and 4GB on Win 10 and 2GB on Linux for those who wish to risk it in hopes to save on costs is what it all boils down to. However, it's not that much more to get the upgraded version in my mind for the added benefits. On a final note, the one and only time I can think of that RAM can directly affect mining hashrates is in the instance of AMD Vega cards used in mining as they required 8GB to unlock mining optimization features. DDR3 or DDR4 for Mining. Again this does not affect the overall hashrate and performance of the mining rig as some might think but it still plays an important role in your mining rigs success. DDR3 and DDR4 refer to the form factor required by your mining rigs motherboard. Meaning the if your motherboard requires a DDR3 RAM form factor then you will need to buy DDR3 RAM to ensure that it will fit into your motherboards RAM slot. The one thing I want to add is most newer mining motherboards require a DDR4 form factor size as most were recently designed within the last year or so. However, DDR4 can become out of stock in a hurry from time to time so it's nice to have options like DDR3 as some of the older motherboards still used in mining can fit DDR3.
Crypto Currency Cabal. University of Virginia cs4501 Fall 2015. Problem Set 2: The Blockchain. Purpose. The goal of this assignment is for everyone in the class to understand how Bitcoin mining and the blockchain work, and evaluate risks to the blockchain. Collaboration Policy. For this assignment, everyone should submit their own assignment and should writeup their own answers to the questions. You may, and are encouraged to, discuss all of the problems with anyone else you want (both on-line using the course web site or any other means you choose, and in person). Submission. Submit your answers as a single PDF file using this link. The name of your file should be -ps2.pdf . Your submission should include clearly marked answers for all the problems (highlighted in yellow). None of the questions require submitting a program, although you may find it helpful to write programs to develop your answers. If the code you write is less than a page, it is best to just include it in the PDF writeup. If it is longer, you may submit separate code files (and mention them in the PDF submission). Blockchain Consensus. These questions concern the original bitcoin paper: What are the assumptions necessary to support Satoshi's claim that it is more profitable for a greedy attacker with a majority of the mining power "to play by the rules"? (other than the assumption that the greedy attacker is a "he") (a) There is a problem with this scheme unless the bytes of data[ i ] indicate that it is in fact from i -th index. What is this problem? (b) Suppose we perform a write at position i , both data and signature. Later on, when we read it back, if the signature matches the data, can we be sure that it is indeed the data item we wrote? Explain. (a) What is the write/read/verify procedure for this system? (b) How does the cost of reading and writing to the database scale with n (the number of records)? These questions are related to this paper (and what was covered in Class 10 and Class 11): Orphaned Blocks are blocks that are submitted to the bitcoin network, and that are valid, but do not become part of the longest (consensus) blockchain. One way to detect selfish mining is to be on the lookout for "orphaned" blocks, or blocks that were mined but never became part of the final blockchain. Let's say you set up a node to monitor orphaned blocks, and you are in a favorable position in the network that allows you to observe all orphaned blocks. Assume that the hashing difficulty stays constant and the expected block rate is constant at 10 minutes per block. (b) Obtain a general formula for expected number of blocks a mining pool with α fraction of the total hashing power should find in t minutes. For the next questions, you may assume a very simplified network model where you can view the network having two "supernodes": one represents a particular mining pool, and the other represents all other nodes in the network. The latency between the two supernodes is L seconds. With this simple (but very unrealistic) model, we assume that when one supernode announces a block, all of the rest of the network learns of the new block L seconds later (but no one learns of it before that). Pool Hopping. Answer either question 10A or 10B (your choice). Bonus Opportunities. The following questions are suggestions for further work, but it is not expected that everyone will solve them. (Note that some of these could be starting ideas for larger projects, although a good answer to any of them would be most impressive.) Challenge 1. The network model in questions 8 and 9 is very unrealistic. Answer these questions for a more realistic model of the bitcoin network, and compare your results with the actual rates of orphaned blocks. To better detect misbehaving miners, you would want to also look into the contents of the dual blocks (note that the one that was orphaned is not necessarily the one from the selfish miner). There is an API for obtaining orphaned blocks provided by https://api.biteasy.com. Challenge 2. The analysis in the paper and in class assumed that if the selfish miner is ahead by 2 blocks, it will always win by releasing the blocks when it observes a new block on the blockchain. It could still lose if the rest of the network finds a second block before the selfish miner's blocks have propagated over the network. How does this possibility impact the analysis? Challenge 3. The site that was demonstrated in Class 11 uses a very simple model to estimate the profitability of a particular bitcoin miner. Produce a better model, and use it to evaluated the expected profit (or loss) for mining hardware such as Antminer S7. A better model would need to capture expected increases in the difficulty, cost of capital, and other costs of mining besides electricity. Follow the submission instructions at the beginning of this page by 8:29pm on Friday, 9 October. Mining Bitcoin Using Old Computers and Retro Gaming Consoles. Bitcoin mining has grown into a vast economy over the past few years as large ASIC-powered mining farms process transactions for the $32 billion dollar market. In the early days, people could mine bitcoins using their central processing units (CPU) and they still can, but the undertaking is extremely inefficient. However, a few people still mess around mining bitcoins using older computers and retro devices merely for the fun of it and for experimentation purposes. Bitcoin mining With Classic Computers and Retro Gaming Consoles. The Bitcoin miningECOSystem is a competitive environment of pools processing transactions while simultaneously securing the network. Miners run special software and use application-specific integrated circuitry (ASIC) to mine bitcoins these days, using chips far more efficient than your standard CPU. Currently, older computers can mine bitcoins at a prolonged rate, but it's still pretty cool to see if a classic system can perform the task of Bitcoin mining. One bitcoin enthusiast has done just that a few times with older computers. Ken Shirriff is well-known in the bitcoin community for his work on getting the bitcoin symbol added to Unicode. Shirriff also has a popular blog where writes about his projects and how he has mined bitcoins using classic devices from the past. Just recently Shirriff has been working on a Xerox Alto restoration and managed to get the seventies built computer to mine bitcoins at 1.5 hashes/second. The Xerox Alto is a well-known computer classic that was the first device to support a graphical user interface (GUI) in 1973. "I've been restoring a Xerox Alto minicomputer from the 1970s and figured it would be interesting to see if it could mine bitcoins," explains Shirriff. I coded up the necessary hash algorithm in BCPL (the old programming language used by the Alto) and found that although the mining algorithm ran, the Alto was so slow that it would take many times the lifetime of the universe to successfully mine bitcoins. The computer's 1.5 blocks per second is significantly slower than the chips used today. Shirriff details the Xerox Alto's speed would take "5000 times the age of the universe" to mine one block. For demonstration purposes, Shirriff used the input of a successfully mined block to see if the algorithm succeeded. Shirriff's code is available on Github for those who would like to try out Xerox Alto mining. An Old IBM Mainframe From the Sixties Would Take Roughly 40,000 Times the Current Age of the Universe to Find a Block. Another project Shirriff worked on back in 2015 was mining with a 55-year-old IBM 1401 mainframe at 80 seconds per hash. This computer was the best-selling computer of the mid-1960s and mainly used for business purposes. "While modern hardware can compute billions of hashes per second, the 1401 takes 80 seconds to compute a single hash," details Shirriff. "This illustrates the improvement of computer performance in the past decades, most famously described by Moore's Law -- To summarize, to mine a block at current difficulty, the IBM 1401 would take about 5×10^14 years (about 40,000 times the current age of the universe)." The card deck Shirriff used to compute SHA-256 hashes on the IBM 1401 mainframe.
Bitcoin Bericht: BTC Kurs macht sich unabhängig von Mining-Aktivitäten. Zuletzt Aktualisiert: 19. November 2020. Ein neuer Bericht des On Chain Analytics Anbieters CoinMetrics legt nahe, dass der erhebliche Einfluss der Miner auf das Bitcoin-Netzwerk langsam abnimmt. Um festzustellen, wie sich ihre Auswirkungen auf das Netzwerk im Laufe der Zeit verändert haben, wurden die Adressen und Ausgaben von Schürfern und Pools untersucht. Nur noch 18 Prozent von Minern verwaltet. Die Messung der Nettoflüsse im Zusammenhang mit Blockbelohnungen ergab, dass die Auswirkung von Minern auf die Liquidität stetig abgenommen hat. Die Online-Plattform Finanzen.net berichtet: ,,So hätten Daten zu Konten, die mit Adressen von Minern in Verbindung stehen, ergeben, dass die Bestände der Schürfer zwischen 2010 und 2020 abgenommen haben. Außerdem befinden sich inzwischen nur noch rund 18 Prozent des gesamten Bitcoin-Angebots im Besitz von Minern - im Jahr 2015 kamen sie noch auf einen Anteil von etwa 25 Prozent." Da Miner neu ausgegebene Bitcoins erhalten, können sie als normale Nettoverkäufer des Vermögenswerts verstanden werden. Betriebskosten wie Strom und Miete müssen in der Regel in Fiatwährungen bezahlt werden, was den Druck erhöht, BTC für Fiat zu verkaufen. Obergrenze bei 21 Millionen BTCs. Im Zusammenhang zum Gesamtangebot wird die allmähliche Verringerung des Angebots von Minern und Pools noch deutlicher. Das auftretende Phänomen ist in die Blockchain von deren Erschaffer Satoshi Nakamoto hineinprogrammiert worden. Das sogenannte Bitcoin Halving sorgt in etwa alle vier Jahre, dass die Menge zukünftig ausgeschütteter Coins halbiert wird. Somit wächst die Gesamtmenge der verfügbaren Bitcoins immer langsamer, bis die im Bitcoin Code verankerte Obergrenze von 21 Millionen Bitcoins erreicht wird. Entsprechend müssen Miner damit rechnen, dass sie für ihre Arbeit immer weniger neue BTC-Tokens erhalten.
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We offer BCH mining. You can also choose to automatically mine the most profitable coin. We deliver the high quality Cloud mining platform. Best VPS For Mining 2020. Crypto mining is one of different ways to profit from cryptocurrencies, especially for people who don't want to put their capital at risk by trading cryptocurrencies on broker platforms. Mining will never bring the returns of successful altcoin trades, but it delivers stable returns without the risk of losses. The times when you could mine Bitcoin at home are long ago. This cryptocurrency not only is the most popular and most expensive one - it can even be called the mother of all cryptocurrencies and the crypto reserve currency. For private households it is impossible to mine Bitcoin since you need special equipment that only mining companies can afford. 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Many new cryptocurrencies have appeared and it gets harder and harder to keep the overview. There are couple of altcoins that count as worth mining, still or especially in 2019. They are not that expensive and some can be mined without special difficulties, even with an ordinary computer like Monero (XMR) - the best anonymous coin there is. Which Cryptocurrency To Mine - The Right Choice. When choosing the right cryptocurrency, you should be careful. Don't look at the price, how much the cryptocurrency currently costs, but how easy it is to mine and how good the prospects are for the particular altcoin. For example, long-term growth in price should be very likely and it should be able to recover the investments you spent on its extraction. In addition, the choice of cryptocurrency and mining service depends on whether it is possible to withdraw funds. This article tries to accumulate the most promising cryptocurrencies. Altcoins that can be mined from virtually any device, including a computer, provided it has a powerful processor and a suitable graphics card. By the way, the topic of the graphics card is particularly acute, because with Bitcoin mining the use of a video card was abandoned - it became too expensive. Therefore, the income from mining is practically lost against the background of the costs. But this article describes the most promising alternatives that are beneficial for mining cryptocurrencies in 2019. Here are some of them: Monero (XMR) One of the coins that can be mined by individuals is Monero. So it's definitely worth looking for the best VPS for Monero mining since this coin is being created through CPU mining which can easily be executed by a external rented server. So you can easily mine Monero on your home desktop computer. Additionally you could even mine XMR on your mobile phone. Ethereum (ETH) Ethereum. This currency will prove itself as heir to Bitcoin, but it is growing incredibly fast. If it cost only $40 at the beginning of 2017, it will cost $893 at that time, i.e. one year later. But the currency is unstable and must be recognized. There are inherent jumps in price - if it costs more than $800 today, the price could fall to $600-700 a piece tomorrow. Therefore, you should think before investing in mining of this cryptocurrency. Litecoin (LTC) Litecoin. Also a very interesting option for mining. The cost of this coin does not make you sweat. Everything is more than modest &ndas; only 250 dollars per Litecoin at the time of writing this post. Competition in the mining of this cryptocurrency is minimal, which makes LTC mining much easier. In addition, experts say that Lightcoin is the most stable currency available and its exchange rate is subject to smaller jumps. Dash (DASH) A promising currency was added to the rating. She belongs to the "youngest", but has already made a lot of noise. Experts say DASH has a chance to grow to several thousand dollars. Start with the fact that a few months ago it still cost 11 dollars and is now worth 1165 dollars. Each of these cryptocurrencies can be described as the most profitable coins for mining, but whether this is really the case will be shown in practice. Here even more coins you should have a look at as they can be mined at home: Vertcoin (VTC) ZENCash (ZEN) Doge Coin (DOGE) Bytecoin (BCN) AEON (AEON) Electroneum (ETN) Feathercoin (FTC) Profitability Of Mining. Some will say that mining in 2019 is no longer profitable and many will agree with you. But in spite of everything, it depends on the cryptocurrency. To find out which altcoins can still be mined for reasonable profits, there is the service "WhattoMine.com". This service is specially developed for those who work in mining. It allows you to calculate the most profitable cryptocurrency you can mine with your graphics card or Asics. On the page, select the type of hardware (graphics card or Asic), then enter the correct information in the specific areas: Performance of your devices (hashing speed) and energy consumption. Then press "Calculate" and you will receive information on how much you can earn when you mine this or that cryptocurrency. Which Hardware To Use. CPU (Mining on the processor). Given the current complexity, such mining is no longer profitable. Mining on the operational memory, for example, if the currency uses the Scrypt encryption algorithm. You could mine, but it's not very profitable now. GPU (Mining on the graphics card). The disadvantages of this method are quite large. The energy consumption and the price of a good graphics card is also not cheap and despite these disadvantages, this type of mining is by far one of the best. For example, compared to the same mining on ASICs, you can always sell the graphics card at a good price. There is always a demand and in case of damage it can be repaired within the warranty period. The best graphics card for mining is the GTX 1070 as far as I know. ASIC (Application Specific Integrated Circuits). These units were specially developed for the mining of cryptocurrencies (bitcoin). However, the high costs and the high risk are negative, as they are difficult to repair in the event of damage. How To Start Mining Bitcoin Using VPS FREE. Tutorial VPS For Bitcoin mining. ? HOW TO START YOUR OWN SUCCESSFUL ONLINE BUSINESS! (EVEN IF YOU'RE COMPLETELY NEW) - Make $150 - $400 a Day. Cryptocurrencies Growth. ? Link Sign Up Simplecoin: CLICK HERE ? http://bit.ly/2SjmjB0. ? Link Free VPS and Commands Mining: 1. Link Free VPS: 2. Commands Mining: ./xmrig -o pool.simpleco.in:8081 -u newvps001.19433 -p x. ? 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How to choose and connect to a Bitcoin mining pool. Mining solo, while sometimes more profitable, it's usually not the right choice for most miners. When mining solo, you are doing all the work alone which means that you'll receive the entire block reward, the problem is that mining is also based on a luck factor, which means that if your hashpower isn't high enough, you may never see a reward come your way. With pool mining, however, this variance is eliminated and you recieve payments that correspond to the portion of the work that you have done. If you are deciding to join a Bitcoin or altcoin mining pool there are quite a few considerations to take into account - mainly their method of distributing the block reward and the fees they charge for managing the pool. Pools also try to stop cheating by miners - i.e. for them to swap between pools. l. Today we want to teach you some aspects of pool mining in the hope that they will help you choose a mining pool that best fits your needs. You can check out our mining pool list here. Make sure to read the reviews and to check the features carefuly. You will also find a list of servers by locaiton and coin in the pool description. The main consideration is the fees, which vary according to which model of payment distribution the mining pool is operating and determines which party is assuming the risk - the miners or the mining pool operator. If the mining pool operator is assuming the risk, then the fees are higher, and if the miners assume the risk then fees are lower. The fees usually range from 0% to 4%. The standard fee for mining pools is usually 1%, so if you spot a pool with a higher fee check its payment method and other features. If there is a pool with similar features and payment method but smaller fee, you'll want to choose the second option. Sometimes a pool will have a 0% fee. This is very unusual and it most often means that you are dealing with a new pool that has no fee in an effort to attract customers. Some pools, however, actually rely on donations and other methods, so if you find a 0% fee, you'll want to keep an eye on any fee changes. You can check out our mining pool list here and organize it by fee. The model where the mining pool operator assumes all the risk is when they guarantee a payment per each proof of work - or potential hash solution - that their miners offer. For example if the total network is 100GH, the mining pool operating this Pay Per Share (PPS) method has a hash rate of 10GH, and the block reward is 25 Bitcoins, then the expected return is 2.5 Bitcoins per block. The pool will give money to their miners even if their pool hasn't successfully mined the block, meaning the risk of lumpy payments is assumed by the operator, and hence why the fees are at the higher end of the range at 10%. Miners will then only receive an expected return of 2.25 Bitcoins per block distributed proportionally by how much hashing power they have contributed towards the block. When the miners assume the risk the fees are generally lower as they take on the risk that they might not solve a block for an extended period of time and receive no payment of Bitcoins. There are varying methods of this with the aim of keeping the pool hashing power stable. - Proportional - the simplest method whereby for each block, the reward is split between the hashing power contributed proportionally by the miners of the block. - Pay Per Last N Shares - PPLNS - looks at the last N shares instead of just the last block. This smooth's the returns for mining rig operators if they haven't been connected for one reason or another. If they contributed to the majority of Bitcoin blocks 1-6, when a reward was found by their pool in block 7, for which they had become disconnected through no fault of their own, then they are still eligible for payouts depending on the time of N. There are other inventions and variations that have been implemented. For example the DGM method (Double Geometric Method), where the operator receives some payments over short rounds and distributes them over longer rounds. There are also some other ways where the more recent proofs of work are allocated a higher weighting in terms of the proportion they are eligible for. Some pools have extra fees on top of PPS (Pay Per Share) schemes - but in generally fees range from 0% for Proportional and PPLNS pool management schemes to 10% for PPS schemes. There also pools that offer the ability to merge mine other SHA-256 coins as well as Scrypt pools that allow you to merge mine other popular crypto currencies such as Dogecoin and litecoin. Over the time, many different payment systems have been developed. Most altcoin pools use the Prop or PPLNS payment system. However, there are several, including: CPPSRB - Capped Pay Per Share with Recent Backpay. DGM - Double Geometric Method. A hybrid between PPLNS and Geometric reward types that enables to operator to absorb some of the variance risk. Operator receives portion of payout on short rounds and returns it on longer rounds to normalize payments. ESMPPS - Equalized Shared Maximum Pay Per Share. Like SMPPS, but equalizes payments fairly among all those who are owed. POT - Pay On Target. A high variance PPS variant that pays on the difficulty of work returned to pool rather than the difficulty of work served by pool. PPLNS - Pay Per Last N Shares. Similar to proportional, but instead of looking at the number of shares in the round, instead looks at the last N shares, regardless of round boundaries. PPLNSG - Pay Per Last N Groups (or shifts). Similar to PPLNS, but shares are grouped into "shifts" which are paid as a whole. PPS - Pay Per Share. Each submitted share is worth certain amoutripnt of BC. Since finding a block requires shares on average, a PPS method with 0% fee would be 12.5 BTC divided by . It is risky for pool operators, hence the fee is highest. Prop. - Proportional. When block is found, the reward is distributed among all workers proportionally to how much shares each of them has found. RSMPPS - Recent Shared Maximum Pay Per Share. Like SMPPS, but system aims to prioritize the most recent miners first. Score - Score based system: a proportional reward, but weighed by time submitted. Each submitted share is worth more in the function of time t since start of current round. For each share score is updated by: score += exp(t/C). This makes later shares worth much more than earlier shares, thus the miner's score quickly diminishes when they stop mining on the pool. Rewards are calculated proportionally to scores (and not to shares). (at slush's pool C=300 seconds, and every hour scores are normalized) SMPPS - Shared Maximum Pay Per Share. Like Pay Per Share, but never pays more than the pool earns. You will also want to take into account the minimum payout. This defines the minimum amount of coins you are allowed to withdraw (or to receive automatically). Some pools allow you to set a limit above the minimum, which allows you to save money on transaction fees. When choosing a mining pool, you will want to check the minimum payout, the payout period, and weather the pool or the user pays for the transactions fees on withdrawals. You can check out our mining pool list here and filter it by payment system. The first thing you'll have to consider is, of course, the cryptocurrency that you would like to mine. The most popular at the moment are Zcash, Ethereum, and Ethereum Classic, among others. These are currently the most profitable ones. You can always compare your profits with each currency through the calculator tool that we have available. Of course, these numbers are subject to change has the price, mining difficulty, and network hashrate change, so it's advisable that you take these into account and that you check on them regularly. Some mining pools allow Merge Mining, which means that your can mine two cryptocurrencies at once without losing efficiency in neither. This, however, is only available with some algorithms. Another type of pool to consider is a multi-pool. These allow you to choose from several cryptocurrencies to mine and converts your profits into Bitcoin automatically. If you are planning to mine an altcoin but want to exchange it for BTC, these may be useful to you. Check out multi.pools here. You can check out our mining pool list here and filter them by currency. If you're located in Europe and mining on a Chinese server, you may not get the best results. Check if your pool has a servers in your country/continent and if so, check the URL for those servers. This will allow you to mine more efficiently. Vardiff stands for Variable Difficulty. It is used to regulate the difficulty of the shares you recieve to work on. This benefits both low hashrate and high hashrate miners as the difficulty will regulate itself to best fit your hashrate. While some mining pools have Vardiff, others will have multiple ports for different difficulties. If your pool has no Vardiff, you may want to test different ports for different difficulty. Mine Bitcoin easily on the cloud without having to buy hardware, or plug your own hardware into the world's highest paying mining pool. The Bitcoin cloud mining you can trust.
Antminer APW3++ 1600w, Antminer APW7 1800w, Antminer APW5 2600w. 7 reviews for Power Supply Antminer APW Series Bitcoin mining PSU. Shipping is very fast. Excellent service. Great Customer service and fast shipping, thx Eastshore. The APW3++ power supply is a great product. Shopping at Eastshore is very easy and the shipping was very fast via Fedex. Why you must buy this item with this seller : - Good packaging from them - Shipping time delivery less than 1 week - china to malaysia! - 100% recommended with A+++ service and support! BUY NOW WHILE STOCK LAST.... 😛 Excellent seller. Excellent packaging. Very good price. 100% recommended. WIN - Both machine have arrived today and are working a treat. They have both earned BTC already. Very Happy. 110% Happy with this Supplier . I have to say that I have got the items quickly and was 100%. Strongly recommend it. -- Sync from EastShore Aliexpress online store. Thank you all, everything works well and the travel time was super. +++++. -- Sync from EastShore Aliexpress online store. fast and trusted! Excellent, as always. Very good comunication, very very very fast shipping (China-Italy in 4 days). Excellent seller A+++ i buy for s7 miner, good! The psu work well. Shipping. Shipments are sent via express couriers. Payment. Various payment methods supported. A 180-day warranty is provided starting from the shipped date. Before shipping. Within warranty period. After warranty period. After-sale support. You are protected from purchase from Click to Delivery. And you enjoy escrow for your purchase at our store on Aliexpress. Return & Refund Policy. Once sold not refundable, unless. On-time Delivery. HOW TO ORDER THROUGH THE SITE. Register an account on the site, add products to cart, fill your desired quantity, choose destination country, shipping cost and total price will show. Follow the system, payment options and related info will show. After placing an order and payment made, you will receive a confirmation email and your order status will be changed to "awaiting shipment". Your order status will be changed to "shipped" when tracking number is assigned for your order. You can review the status of your order at any time in your user account. PRICES AND AVAILABILITY OF PRODUCTS. Prices of products on the site are in a USD value. The price of Bitcoin mining machines has to be adjusted frequently in accordance with variables such as BTC value and market circumstance. Refund requests based on price changes cannot be honored. The payments for orders are accepted through the Bitcoin ("BTC") payment network and other options such as wire transfer. In the event you choose to pay in BTC, the site will calculate and convert the USD value to BTC amount according to our chosen exchange rate (which is a weighted average from major Exchange sites around the world). Later changes to the exchange rate of USDBTC have no effect on the amount to be paid for your placed order. On occasions, the submodel of products could be changed before shipping. In that case, the buyer will be informed. And if there is any price difference, we will refund the difference if the submodel is switched to a lower version; we will ask the buyer to make up the difference if the submodel is switched to a higher version. The switch of submodels will not be honored as a reason for refund. REFUNDS. All purchases are final. Request for refund will not be honored by us. We advise you to make any payment only after careful consideration. In the case that we fail to ship out your order, we will contact you for refund. Generally, refund will be in USD with the USD amount of your order amount instead of the BTC amount, considering USD is a fixed amount, not a variable like BTC. NOTICE TO SITE USERS ON TAX AND CUSTOMS DUTIES. All prices for products sold by us and invoiced by us to territories others than People's Republic of China are entered without value added tax and customs duties. You are solely responsible to consult your state and local tax laws to determine compliance with tax laws and regulations in your area and pay the taxes and duties if applicable according to your tax residential law. We are willing to provide assistance within our ability for your customs clearance though. We reserve the right to change the declared value requested according to customs circumstances. If the buyer fails in customs clearance, or shipment is returned or abandoned, the order is not refundable. If shipment is returned, we will resend the returned shipment under the circumstances that the buyer pays fees incurred within a week the returned shipment is received by us. EastShore does not take any responsibility for or compensate for any loss as result of downtime caused by delays in transportation as a result of custom formalities or other reasons. DELIVERY SERVICE. Delivery will be arranged after the order is fully paid. Delivery service is provided by third parties such as the national post services or international express shipping couriers such as DHL, UPS, FedEx. The international express shipping couriers are usually door-to-door services. Please note that we may choose a different service (an optimal option on the occassion) rather than the option as displayed when you placed order. DELAYED SHIPPING. Delays due to shipping service provider, weather conditions and public holidays are not qualified for refunds. Delays due to manufacturers' production capacity are not qualified for order cancellation or refund. Delays due to customs reasons, wars or any other contingencies beyond the EastShore's control are not qualified for refunds. WARRANTY PERIOD AND WARRANTY LIMITATIONS. A 180-day warranty is provided starting from the shipped date. Overclocking the miner will void the warranty immediately. All sales are final. No refunds will be granted unless we fail to ship your order. Defective miners can be repaired for free if they fall under our warranty policy. After the warranty period, machines can be repaired at the cost of parts and labor. The following events will void the warranty: Damage caused by poor power supply, lightning or voltage surges; Burnt parts on hash boards or chips; Miner/boards/components damage due to water immersion or corrosion due to wet environment. For all repairs, within warranty or not, customers must return the defective parts at his/her own expense after troubleshooting with our instructions. We will cover shipping cost when shipping a replacement unit to the customer within the warranty period. EastShore does not take any responsibility for or compensate for any loss as result of downtime caused by delays in transportation as a result of custom formalities or other reasons. We warrant the product, its components and labor to be free from defects in material and workmanship under regular uses defined in user manuals and this Warranty during the warranty period. The warranty period of certain product is specified on the page of that product and commences on the date of delivery. This warranty does not apply to: normal wear and tear; damage resulting from accident, abuse, misuse, neglect, improper handling, overclocking or improper installation; damage or loss of the product caused by undue physical or electrical stress, including but not limited to moisture, corrosive environments, high voltage surges, extreme temperatures, shipping, or abnormal working conditions; damage or loss of the product caused by acts of nature including, but not limited to, floods, storms, fires, and earthquakes; damage caused by operator error, or non-compliance with instructions as set out in accompanying documentation; alterations by persons other than us, associated partners or authorized service facilities; counterfeit products; damage or loss of data due to interoperability with current and/or future versions of operating system, software and/or hardware; damage or loss of data caused by improper usage and behavior which is not recommended and/or permitted in the product documentation; failure of the product caused by usage of the products not supplied by us; hash boards or chips are burnt. WARRANTY SERVICE. During the warranty period, we will undertake to repair, or based on our sole discretion, to replace a defective product by an identical or similar (e.g. newer) version of the product, unless the defect was the result of Warranty limitations. The repair of the product is free of charge for the parts, components and labor necessary in order to perform the repair and restore the product's proper operating condition, provided the unit is returned otherwise undamaged and shipping prepaid. The costs incurred in connection with the returning of the product, part, or component to us shall be carried by the product owner. If the product, part, or component is returned uninsured, you assume all risks of loss or damage during shipment. DEFECTIVE PRODUCT AND REPAIRES DUE TO PRODUCT ERROR. If your item is defective due to product error (excluding defects under Warranty Limitations) within the warranty period, you may return it for a repair at your own expense under the terms of the warranty, but without undue delay upon discovery of the product's defect. YOUR ACCEPTANCE OF THESE TERMS. By accessing this web site, you are agreeing to be bound by these web site Terms and Conditions and agree that you are responsible for compliance with any applicable local laws. If you do not agree with any of these terms, do not purchase from this site. Your buying from the site will be deemed your acceptance of the Terms and Conditions. We reserve the right to make changes to the Terms and Conditions.