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6 Best GPUs for Mining Cryptocurrency in 2019


6 Best GPUs for Mining Cryptocurrency in 2019
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When cryptographic money only appeared, mining was practiced by a minority of people in the know. At that time, it seemed like mining was available for tech-savvy people only. Luckily, things are different. Now, you only need to discover the best GPU for mining, install it, and enjoy the profits.

While mining ETH and BTC was popular and relevant in 2016-2018, the current difficulty of calculations makes the process very challenging. It’s almost impossible to mine BTC and ETH using a regular GPU. But who said you can’t mine other coins? Even the current decrease of interest in mining doesn’t prevent individuals from attempting to mine altcoins. Truth be told, if you want to make profits you should either use the best mining hardware or not use it at all. The mining industry keeps evolving, offering us innovative mining machines. Let’s check out which are the worthiest mining GPUs in 2019.


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Top Cryptocurrencies by Mining Revenue in 2019: Bitcoin (BTC), Ethereum (ETH), Zcash (ZEC), Litecoin (LTC), and Bitcoin Cash (BCH)

How to select the best GPUs for mining?

Before we observe the worthiest mining GPUs, let’s look over the essentials of GPU mining cards that matter for efficiency and speed. This will help us understand how the industry standards have changed, and how to make an informed decision.

Take a look at the features that matter for the choice of GPU.

1. VRAM

Previously, some 2-4 GB of VRAM were enough to mine Ethereum and cryptocurrencies alike. When Ethereum appeared only 4 years ago, it began at 1 GB, and the volume was increasing by 750 MB yearly. We're in 2019 now, which implies the best models for mining ought to have at least 8 GB of internal memory. With an old 2 GB card, you won’t earn any crypto at all.

2. Hashrate

Being a critical point, hashrate is the speed at which a device makes calculations to solve algorithms. This variable is estimated in hashes made per second, and the top-notch models have this speed measured in Mega-hashes (MH/s), which means at least 1 mln hashes are executed in one second. The most advanced GPUs can likewise have GH and TH values.

3. Bus width

To put it simply, it defines the amount of chips that can be located on one device. As you already know, the efficiency of a card is defined by its memory, so you should definitely opt for a higher bus width. A typical 256-bit card with 8 chips is not enough today: you should opt for a better memory level to use at least 16 chips.

4. Power consumption

Mining is a costly process even after you buy the equipment – you need to pay electricity bills afterward. Make sure that the GPU consumes less power than its counterparts. If you want to enjoy a steady income, your mining hardware should be functioning 24/7. So make sure your GPU provides a generous performance for the amount of consumed energy.

5. Cooling

Now that you’ve looked into power utilization, you should be careful that your mining farm does not get too hot. It’s important because overheating can harm the hardware. It'll not only make the atmosphere in the room agonizing, but may also prevent your graphic card from working properly. Go for open constructions – it allows for optimal cooking. Don’t forget to buy fans and install them.

Now that you know what matters for the choice of mining units, we can get down to reviewing the best 6 models in 2019.

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AMD Radeon RX 470

AMD Radeon RX 470
AMD Radeon RX 470 – excellent performance in any conditions

This device is incredible – it’s always up to the task. This unit will function superbly regardless of the conditions. It is very productive, delivers AAA graphics, and stays ergonomic. It goes without mentioning that the device is compatible with most PCs. It is pretty quiet, not mentioning a low heat generation level.

Advantages:

  • Outstanding efficiency

  • Energy output level is brilliant

  • Optimal memory level – great for its cost

Cons:

  • Too costly

AMD Radeon RX 480

Some time ago, this model was a top pick among miners, one of the most highly demanded ones. It has quickly transformed from a solution for gamers to mining equipment. AMD utilized this card to upgrade to the fourth graphic code. They added transistors while leaving the power requirements at the same level. It also features a fan that works from load. Though the noise is quite high, it is absolutely endurable.

Advantages:

  • Optimal performance

  • Excellent speed

Cons:

  • Emits a lot of noise

AMD Radeon RX 580

This graphic card is a golden middle. i.e., it enables trouble-free mining while providing average speed (1340 MHz). Consider this astonishing GPU for mining ETH and ERC-20 tokens. It additionally features double fans which adjust operating speed to the loading. There’s only one disadvantage: this card is not as ergonomic as the past 480 variant.

Advantages:

  • It offers an astonishing HD performance

  • Highly customizable

  • Great quality/cost ratio

Cons:

  • High power consumption

  • Cards are far from being compact

AMD Radeon RX Vega 56

AMD Radeon RX Vega 56
AMD Radeon RX Vega 56 – optimal speed and extra cores

This gadget is positioned as one of the most suitable options for crypto mining. Moreover, it is the 2nd quickest designs card existing in the RX Vega series. The card is basically founded on the Vega design involving the same memory and type of processors.

This GPU is less speedy than the RX Vega 64. Notwithstanding, it requires less power. Its process execution is brilliant. The GPU is accessible in air-cooled editions with the highest power utilization of 210 W. To reap a higher mining power from the unit, you can leverage custom BIOS to open its additional features.

Pros:

  • Optimal speed and power

  • Extra cores with BIOS are available

Cons:

  • High power consumption level.

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AMD Radeon R9 Fury X

Each and every component of this GPU has been upgraded for speed, efficiency, and energy productivity. Instead of an air framework, they use water for reducing heat – this innovation functions pretty well. It’s a long-lasting device that allows earning coins for hours, days, and weeks.  

Advantages:

  • Water-based conditioning innovation guarantees great performance

  • Optimal memory limits

Cons:

  • Might be hard to cool

Nvidia GeForce GTX 1050 Ti

Nvidia GeForce GTX 1050 Ti
Nvidia GeForce GTX 1050 Ti – high clock speed and great price

A top-choice for mining ERC-20 tokens. It is proficient, comes at an extraordinary cost, and it functions perfectly with any framework where you want to increase your crypto profit. The design reminds of the Pascal GPU structure, and the device is great not only for crypto mining but also for VR interactivity. By the way, its 1760 MHz rate is exceptional!

Pros:

  • Stays very quiet

  • Energy efficiency

  • It can execute all mining tasks

  • Great price/quality ratio

Cons:

  • Not compatible with all PCs

Bottom line

Even though crypto asset mining is not as profitable as before, you can still be a happy owner of many interesting altcoins – there’s no need to restrict your crypto portfolio by BTC and ETH only. The crypto market offers a huge amount of coins, while the hardware market boasts a great variety of coins. If you’re ready to invest in mining hardware, consider some of the above-mentioned Top-6 GPUs: they deliver excellent mining quality while staying power-efficient.

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How to Learn Solidity and Start Blockchain Programming

  • Eric Croix
    📚 WikiCoin

    If making an Ethereum-based dApp or creating an ERC20 standard token sounds compelling to you, than you need to learn the language called Solidity. In our tutorial we provide you with the foundation of coding smart contracts


How to Learn Solidity and Start Blockchain Programming
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Blockchain programming has become one of the best paying and challenging software spheres during the recent decade. Although blockchains are language-agnostic and many of the existing languages, like C++ and JavaScript (JS), are used by blockchain engineers, there are some tasks that couldn’t be conveniently realized by existing languages, which opened up the demand for new, crypto-specific options. One such language is Solidity.

Solidity was born as a core part of the Ethereum ecosystem. It absorbed C++, JavaScript, and Python. It has many contemporary features like libraries and inheritance. Solidity is designed to write programs that interact with Ethereum accounts, which are called smart contracts. Smart contracts are executed on Ethereum Virtual Machine (EVM), enabling users utilizing them perform tasks like crowdfunding, blind auctions, voting, and many others in a decentralized manner. The most famous killer-app of smart contracts was decentralized funding in ICOs, which started the bull rally on the crypto markets in 2017.

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Whether you are an experienced developer or just starting out in crypto, it’s a good idea to start learning Solidity because smart contracts have become a crucial part of the blockchain ecosystem. Aside from being actively implemented by dApps, they are being actively integrated into infrastructure-layer blockchains and even in Bitcoin via providers like RSK. By knowing how to build smart contracts you will make your blockchain career more sustainable and be able to produce better quality solutions. Let’s not pull it off any longer and get our hands dirty with coding!

Understanding the basics of a smart contract

A smart contract account consists of three sections: balance, storage, and code. The balance represents how much Ethereum a smart contract has. Storage holds data like strings and arrays that are specific to an application. The code section has the raw machine code that is compiled from what we write in Solidity.

Unlike user accounts, smart contract accounts are not external to the respective networks. In other words, you can use your wallet with various networks like Kovan and Ropsten, but you can’t do this with a smart contract. Smart contracts are internal.

Each smart contract has a source, which is stored on an author’s device and instances, which are stored on the blockchain. In order to create an instance (account) of a smart contract, we need to deploy it to the network. It very much resembles the relationship between classes and instances in traditional object-oriented programming (OOP) and languages representing it (JS, Ruby). To give you a more visual representation, let’s create a class ‘Bike’ and add an instance of it.

Bike class & instance

Bike class & instance

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What we will be writing is a contract definition, which will then run through a compiler that will produce two files: bytecode and application binary interface (ABI). Bytecode is what will be actually fed to the EVM and ABI is a layer between bytecode and regular JavaScript code that allows building a user interface (UI).

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Choosing an IDE & version of Solidity

Before we start, we need a proper integrated development environment (IDE). In other terms, we need a convenient terminal with the necessary tools to write our code in. For the purposes of this tutorial, we will pick Remix, an IDE created by the Ethereum foundation that allows writing, testing, debugging, launching smart contracts and many more. You can use it either straight in the browser or download it locally if you would like.

Once you launch Remix, you will be presented with the code editor in the center, the file manager on the left, and a compiler on the right.

Initial Remix window

Initial Remix window

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There will be some pre-written code – we won’t need that. To create out first-ever smart contract let’s press on the little plus icon in the top-left corner of the terminal and give it a name.

Creating a new project in Remix

Creating a new project in Remix

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As we have the blank .sol document now, we should specify the version of Solidity that the compiler will run. At the time of this tutorial, the latest version is 0.5.7. If you are not sure which version to use, you can specify a range of versions.

2 types of specifying the version of Solidity

2 types of specifying the version of Solidity

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Lastly, let’s give our smart contract a name, followed by a parenthesis.

Smart contract naming

Smart contract naming

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Writing your first smart contract

Once we have our canvas ready, it’s time to define the basic building blocks – variables. While experienced software engineers will have no issues understanding this concept, we will briefly introduce it to beginners. Variables are placeholders for chunks of information that are later referenced by a program that runs them.

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Let’s create a couple of variables: a string (a sequence of symbols) and an integer (a number). In Ethereum’s case, variables are stored in the blockchain along with the rest of parts of contracts and can, therefore, be accessed and updated from anywhere. Another key characteristic of Solidity variables is that you can make them private by writing ‘private’ next to the variables. Finally, for the integers, Solidity has two types: signed (can be positive & negative) and unsigned (can only be positive). To specify an unsigned variable, we should just put ‘u’ before it.

A private string and an integer

A private string and an integer

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Once we have the ‘name’ variable, we need to write out the methods of setting and getting it. This looks like a JS function. Remember that Solidity is statically typed, so we have to define variable types. Now any value we put in the ‘setName’ will define the ‘name’ string. For the getter, we will use ‘getName’ and specify what variable we expect to see. Now, it’s time to do the same for the ‘age’ variable. The method is constructed similarly to the ‘getName’.

Name/age setters and getters

Name/age setters and getters

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Let’s test our little chunk of code. Go to the ‘Run’ tab of the compiler and press ‘Deploy’ under your contract’s name. At the very bottom of the compiler, you will now see the ‘Deployed Contracts’ section that has our methods available. In order to pass a name to the ‘newName’ value, we need to make sure that our string is written in JSON, otherwise, the ‘getName’ will return nothing. For the ‘setAge’ just put your age without quotes. As you see, we can now set and receive the ‘name’ and the ‘age’ variables through our smart contract.

Compiler, with a name and an age

Compiler, with a name and an age

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Defining Wei and Gas

One of the most remarkable features of smart contrasts is that to deploy them to the Ethereum network you will need to initiate a transaction, which costs some amount of money that is paid in Ether. It’s crucial to understand how the fees are utilized in the system, as they will be deducted each time you interact with EVM.

What’s Wei?

Let us assume that reading this far into our tutorial you have used Bitcoin at least once. You probably made a small transaction that was way less than 1 BTC. In that case, you used Satoshis, which are something like pennies for a dollar. Wei is like a Satoshi – it’s the smallest part of 1 Ether. If we think of it in programming terms, it’s the lowest unsigned integer in the network. While interacting with the network, you will mostly encounter Gwei, which refers to Gigawei and equals 1 billion Wei.

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What’s Gas?

Gas is an essential part of the mechanism of smart contract execution. It has two values for each transaction: Gas consumed and its price. It’s worth mentioning that a user initiating a transaction defines these values. However, if the set value of Gas won’t be enough to process a specific operation, then the Gas will be consumed, but the transaction will fail. Moreover, if the price for Gas will be set too low for the network at a given time, the transaction will not be processed by the nodes, eventually making it unsuccessful. There are several services to check optimal values for your transactions, one of them being ethgasstation.info. To get a better understanding of Gas and why it costs any money, let’s code some of it by ourselves.

Get back to your Remix window and initiate a new file. In our example, we will call it ‘Gas’ and create a contract with the same name. Bear in mind that the more data we will require to store on the blockchain, the more Gas we will need. That being said, for the purpose of this tutorial we will create a cheap contract; the more you will add to it, the higher the fee will be.

There will be a function that returns an integer that is a sum of two inputs. To make it as lightweight as possible, we will specify that our contract will store nothing on the blockchain, and for that we will put ‘pure’ next to the function.

Cheap contract

Cheap contract

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Now you can deploy it in the compiler and input any two numbers to get the integer ‘c’. To check the price of our transaction we should take a look at the terminal located beneath the code section. There is a transaction cost and an execution cost. The first one refers to how much data a transaction has. The second one refers to how much of EVM’s power was required by the transaction.

Cheap contract’s cost

Cheap contract’s cost

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This is an extremely basic transaction that costs almost nothing for the network. In writing meaningful smart contracts you will add more details, which will increase their weight and therefore transaction fees.  

Creating & deploying your own ERC20 token

Let’s face it, the majority of the blockchain developers that are just starting out are eager to play big and create their own blockchains and tokens. While this is an extremely difficult topic that attracted some of the best software engineers from other spheres, building a basic ERC20 token isn’t rocket science.

First, we need to create another file in Remix and uploading the ERC20 interface, which is the following:

ERC20 standard

ERC20 standard

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The ‘totalSupply’ function lets us see how many tokens we have in total. The ‘balanceOf’ function is used to get amounts of tokens on specific addresses. The ‘transfer’ function allows users performing transactions between each other. The ‘transferFrom’, ‘allowance’ and ‘approve’ functions are there to allow people to let some other users initiate transactions on their behalf. Events are the logging tools for the ledger.

In addition to the interface itself, we will need a separate .sol file for our new token. Here we will import the ERC20 interface and specify our token’s symbol, name, and decimals.

uToday token

uToday token

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Before we compile it, we need to specify constraints.

  • Let’s start with the total supply – it’s a constant integer variable that we will make private. The total supply of our tokens will be 1 million, we also write a function to return this value.

  • Second, we need to store our token somewhere. For this, we will need to outline the mapping that will return a balance for any address specified.

  • Third, there should be a function for token transfers, which will essentially have an address of a receiver and an amount of token transferred. This function should also be able to check whether or not a sender has enough tokens on their balance, which can be realized through a simple if/then statement. In addition, we will set conditionals for ‘_value’ in a way that blocks users from sending transactions with 0 tokens as this would only flood the network with junk.

  • Fourth, we should create the mapping for the remainder functions, which is a mapping of mapping to an integer.

  • Then we will specify a few checkers in the ‘approve’ and ‘allowance’ functions and put conditions for the ‘transferFrom’.

  • Finally, not all the tokens will be available on the market. Some of the tokens are usually left out for teams, foundations, advisors and other purposes. Hence, it’s essential that we make it clear how many tokens will be circulating. As we created the tokens, the circulating supply equals our balance.

uToday token constraints

uToday token constraints

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The code is ready, so let’s test it. Proceed to the ‘Run’ tab of the compiler and deploy our token contract. You will see that we have our token data along with the total supply, balances, and allowances. Congratulations, you deserve a pat on the back!

To make our token actually function on the network, we need to deploy the smart contract (note that this is different from deploying it for testing in Remix). For the sake of this tutorial, we will use Remix and Metamask, but there other ways of doing so. Metamask is a simple but efficient Ethereum wallet program with a nice UI that integrates as an extension to some of the most popular browsers. In our case, we will use Opera. Firstly, go to metamask.io and download the extension. Once it’s done, you will see a fox icon in the top right of your browser.

Downloading Metamask & location of the icon

Downloading Metamask & location of the icon

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Press on the icon and proceed through the offered instructions to create a wallet. Do not forget to store the secret phrase! When you have your wallet, press on the Metamask icon and change the network to ‘Ropsten’ because we don’t want to mess with Ethereum’s mainnet.

Changing Metamask to Ropsten

Changing Metamask to Ropsten

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The last step is to generate some Ether (unfortunately, you won’t be able to use these for any real purchases, but they are necessary for testing). Head over to faucet.metamask.io and request 1 Ether.

Now you are all set. Return to your Remix window and change the environment to ‘Injected Web3’ in the compiler. Take a look at the account tab too – your address should be the same as that of what you generated with Metamask. Select the smart contract you want to deploy, which is your token contract and not the ERC20 interface and press on the respective button. A Metamask window will pop up with a transaction, its details, and options to interact with it. Submit the transaction, and our token will come into life.

Metamask popup

Metamask popup

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You can now play around with all the functions we specified earlier. Let’s look at our contract from another side to verify that it works properly. Like any other blockchain, Ethereum has multiple block explorers which serve the essential purpose of monitoring what’s happening on the network. In our case, we will stick to etherscan, though there is a handful of other great alternatives. Note that if you just go to etherscan, you will see the Main network. As we need to see the Ropsten network, you will need to put ‘ropsten.’ before the website’s address. Search for your address and you will see two transactions – one is for free Ether you received, and another is for deploying the contract.

User’s address in Etherscan

User’s address in Etherscan

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To find the address of your contract, press on the TxHash and navigate to the ‘To’ field. Here you can check your smart contract’s transactions, code, and events. At this point, we need to verify and publish our contract. Go to the ‘Code’ section and click on the ‘Verify and Publish’ link. Here you will need to again specify the name of your token, the version of the compiler (in our case the latest version of Solidity we used was 0.5.7, so we will stick to the related compiler version). Now you should copy the token’s smart contract code along with the ERC20 interface code from your Remix window to etherscan and press ‘Verify and Publish’ at the bottom of the screen.

Verifying the smart contract

Verifying the smart contract

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It’s time to go back to your contract’s address. The code in the ‘Code’ tab will now be verified. In addition, you will now have two more tabs: ‘Read contract’ & ‘Write contract’. In the reading section, we can check the functionality of our token. Input your (not the contract’s) address into ‘balanceOf’ field to see how many tokens you have; it should show 1 million that we hard coded as the total supply and gave it circulating to our wallet. That means that our token is now correctly working on the testnet.

Receiving the balance

Receiving the balance

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Summary

If you are looking to start a career in the crypto industry, you need to understand that despite its relative simplicity in basics, blockchain has incredible deepness to it. Since 2017 blockchains have evolved significantly and their use cases went beyond just financial transactions. With the advent of Ethereum, a whole new layer of networks appeared that hosts various dApps and blockchain-based solutions. The tool behind this evolution was a smart contract, and if you want to make your experience more valuable and future-proof, you should know how one works.

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While you can code smart contracts using other languages, Solidity is a better fit for such a purpose. Moreover, if you want to become an Ethereum developer, or create an ICO/ERC20 token for your project, this is your go-to choice. If you had some experience with C++ or JavaScript, coding on Solidity should be relatively easy. You will have to understand some differences between the client-server and decentralized models of launching software, though. Thanks to Ethereum Foundation and some third-party organizations, developers are presented with a set of convenient tools like Remix and Etherscan to code and deploy smart contracts.

We hope that our tutorial helped you with getting around the majority of Solidity’s concepts to be able to start your blockchain journey. Remember that you can always check with the latest documentation on Solidity. We wish you good luck and will be happy to use some of your dApps someday!

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