Due to the rising prices of many cryptocurrencies, mining is currently also worthwhile again with local electricity prices. Due to international ve..

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6-GPU GeForce GTX 1070 Dual-Mining System for Ethereum and Decred
07/02/2017 by Stefan

07/02/2017 by Stefan


Due to the rising prices of many cryptocurrencies, mining is currently also worthwhile again with local electricity prices. Due to the very high electricity costs in international comparison, mining in Germany was quite uninteresting for a long time. We have built a 6-GPU dual-mining system to mine Ethereum or its currency Ether (the second most common cryptocurrency behind Bitcoin) and Decred as a second currency.

A cryptocurrency is a virtual and decentralized system in which a virtually infinite number of participants verify all transactions and thus ensure the integrity of the system. In the Blockchain, all transactions are lined up chronologically, making the system transparent and forgery-proof. Since these calculations are very computationally intensive, this provides protection against manipulation. If you wanted to bring in a wrong transaction, you would need more processing power than the entire network, which seems almost impossible with larger currencies like Ethereum.

In order to generate (mine) a cryptocurrency, complex mathematical puzzles must be solved, which are very time-consuming and become more and more difficult over time. With GPU mining, the computing processes are not carried out by the processor, but passed on to the graphics cards installed in the system. Due to the graphics card architecture and the high memory bandwidth, this makes sense with Ethereum, for example, because Ethereum’s algorithm is designed in such a way that so-called application-specific integrated circuits (ASICs) cannot be used sensibly. An ASIC is a piece of hardware made for one purpose only (optimized for software). Since ASICs completely displace normal PCs/graphics cards and thus normal miners (as was/is observed with Bitcoin), the goal was to develop Ethereum in such a way that it is very difficult to use an ASIC system.

The computing power of a system is measured in MH/s (megahashes per second). Graphics cards with fast memory such as the AMD Radeon 470/480 or 570/580 or the latest Nvidia GeForce GXT 1060/1070 are suitable for Ethereum mining. The latter can be operated quite energy-efficiently with a reduced power target of 70-75% and an increased memory clock. Therefore, despite the higher price compared to the AMD Radeon, the Nvidia GeForce GTX 1060/1070 graphics cards can still be worthwhile.

Although the AMD Radeon 470, 480, 570 and 580 are currently among the most popular Ethereum mining graphics cards due to their low price, it looks like the Nvidia GeForce GTX 1060/1070 will soon take the lead. First of all, as already mentioned, the GeForce graphics cards are a bit more efficient (more megahashes per watt), but the observed hash rate drop of the AMD graphics cards is much more important. Because with each DAG epoch, which currently increases by one counter every 4 days and increases the Ethereum difficulty, the hash rate of the AMD graphics cards decreases slightly, which will lead to a performance reduction of just over 15% in the next 3 months. As early as late 2017/early 2018, AMD Radeons could drop to 50% of current performance.


has a detailed test on the effects of future DAG epochs

Graphic cardEthereumEthereum (Mod/OC)Power consumption (Mod/OC)Watt / MH (Mod /OC)
AMD Radeon 47021MH/s26MH/s135 W5.2
AMD Radeon 48025MH/s28MH/s150 W5.4
AMD Radeon 57022MH/s26MH/s135 W5.2
AMD Radeon 58024MH/s28MH/s150 W5.4
AMD Radeon RX Vega 5629MH/s33MH/s185 W5.6
AMD Radeon RX Vega 6432MH/s38MH/s250 W6.6
Nvidia GeForce GTX 106020MH/s23MH/s115 W5
Nvidia GeForce GTX 107026MH/s30MH/s150 W5

Since the performance also differs from model to model (here it depends, for example, on the built-in memory) and the mining software (version) used also plays a major role, the above values ​​are only to be seen as a guide. Deviations of up to 10% are quite possible.

Proof of work (PoW) vs. Proof of stake (PoS)

Ethereum currently has a Proof of work (PoW) system similar to Bitcoin, in which the miner (or pool) is rewarded for first calculating the next block, which must meet certain criteria depending on the current difficulty and is considered valid. The development team behind Ethereum would like to switch to a hybrid of Proof of work (PoW) and Proof of stake (PoS) with the next release (Metropolis) in 2017.

A small percentage (currently 1% is planned) of the blocks no longer has to be searched for by the miners, but is allocated to an account in the network according to certain criteria. To do this, members must issue ether (the currency of Ethereum) to virtual miners, which is lost in certain cases (choosing the wrong blockchain). Which the future blockchain is also depends on the amount of ether connected to that blockchain. It is hoped that this hybrid system will reduce Ethereum’s energy consumption, since the virtual selection of the right blockchain naturally requires significantly less computing power. However, since this system is very complicated and theoretical, it is quite possible that a publication will be a long time coming after 2017.

Required components / test system setup

We therefore chose 6 graphics cards of the type

The second most important hardware component in our system is the power supply. Since the system runs around the clock, an economical (80+ platinum certified) and at the same time powerful power supply is required. We chose the

We use PCIe risers to fit 6 dual-slot graphics cards on a normal mainboard. Specifically, here we use PCIe x1 to PCIe x16 USB 3.0 riser with SATA power. The bandwidth of PCIe x1 is completely sufficient for mining here, because the calculations are only made on the graphics cards.

Bios settings for mining with 6 graphics cards

In order for the bios to recognize all six graphics cards, the PCIe speed must be switched from Gen2 to Gen3. This does not have a negative impact on the mining speed. The Bios of our

Windows 10 vs Linux

We recommend
as the operating system

Windows 10 Updates & Settings

After you have installed Windows 10 (64bit version), you should check that Windows Update has downloaded and installed all updates. You should also download the latest Nvidia G-Force graphics card driver (

Checks in the device manager whether Windows has really recognized all graphics cards. It took us multiple reboots for Windows 10 to properly install all six graphics cards.

If you use more than one graphics card, you should also set the Windows virtual memory (page file) to at least 16,000 MB, we used 25,000 MB here.

Create an Ethereum account

Now that the operating system is installed, updated and set up, the first thing we need to do is look at Geth (

Starts a Windows console window (Windows key + R and then type “cmd”). Change with

cd C:\Programs\geth

into the installation directory of geth. With the
command

get account new

you can create a new account and password. Make a note of your password, without a password you will not be able to access your wallet later. Geth also creates a keystore file (UTC). This is stored in the path C:\Users\USERNAME\AppData\Roaming\Ethereum. Make a good backup of this file, ideally on another data medium.

You can now download the Ethereum blockchain (currently around 60GB) onto your PC. This is necessary if you want to have a local wallet. This is the safest, especially if you later want to hoard larger amounts of virtual currency there. If you are planning to exchange the generated ethers for hard currency (e.g. euros) very quickly anyway, a WebWallet such as
is sufficient

If you decide to use the local wallet, you have to download the Ethereum blockchain to your computer via geth. This process can be accelerated with the additional parameter –fast, then geth only downloads the headers.

geth –rpc –fast

All commands are

Access to the Ethereum wallet

As already mentioned, to access your Ethereum wallet, you can select e.g. Keystore File (UTC/JSON). geth created this file locally on your system. You will need your personal password to decrypt the file.

Here you will also find your Ethereum wallet address (see picture no. 2), which you have to enter in the BAT file of the mining software.

Decred Wallet

If you want to mine two currencies at the same time (in our case Ethereum and Decred), you need the Windows software Request Payment you can create an address that you can then add to your pooling Account entered. We’ll introduce you to the Suprnova pool later.

You can find complete instructions for Paymetheus directly in the

Join an Ethereum mining pool

If you want to generate Ethereum successfully and efficiently, you have to join a pool. Thousands of computers are united in a pool, which then dig together for the currency. If a currency unit is successfully calculated, it is divided among all members of the pool who were involved in the creation. The distribution takes place according to the computing power provided and is usually made several times a day. The pool retains a small fee of usually 1% for each distribution. A current overview of all active pools and their total computing power can be found

One of the largest pools is currently

Each pool offers anonymous statistics. In addition to the current and average hash rate, you can also see how much credit (in Ether / Bitcoin or USD) you have already earned. By default, ethermine.org pays out the credit as soon as 1 ether (currently equivalent to around 200-300 euros) has been collected. However, an earlier payout from 0.05 Ether (currently around 10-15 euros) is also possible, but this incurs a small fee.

Under Shares you should regularly check that there are not too many Stale shares. This refers to transmitted blocks that you have correctly calculated, but which have now become invalid (and are therefore not remunerated). Although you have no direct influence on the number of stale shares, a percentage greater than 5% indicates problems with your mining hardware. Reasons for a high stale share rate can be, for example, a slow / unstable internet connection or hardware that is too slow.

Suprnova Mining Pool for Decred

For the second currency Decred we have chosen the

Mining Software: Claymore’s Dual Miner

Now, of course, we still need the actual mining software. We chose the Claymore Dual Miner (

For our system with 6 GeForce GTX 1070, this means a reduction in earnings of about 30 euros, but we also generated Decred with a value of about 60 euros. You have to decide for yourself whether the additional net profit of around 30 euros or 5% of the additional effort of dual mining is worth it, because in the end there are also transaction costs when converting ETH/Decred to Bitcoin or euros, what further reduces the lead of dual mining. Optionally, you can also use our instructions for single mining.

In addition to Ethereum (or Ether), you can also dig for Decred, Siacoin, Lbry or Pascal Coins. However, the second currency is not mined at full speed, because then the speed of the main currency would deteriorate rapidly. In practice, the rate at which the second currency is mined is around 15% of what is actually possible.

The software supports single mining mode (1% fee), in which only Ethereum is mined, as well as dual mining mode with 2% fee. The software collects the fee itself by automatically mining once an hour for 36 (1% fee) or 72 seconds for the developer.

According to the website,
is currently worthwhile
Um Ethereum und Decred gleichzeitig zu schürfen, starten wir den Claymore Dual-Miner per BAT-Datei mit folgendem Inhalt:

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eu1.ethermine.org:4444 -ewal 0x1F7cf431E3BDf966142d3256D4dc59B0cXXXXXXX.FREIERPCNAME -epsw x -dpool stratum+tcp://dcr.suprnova.cc:3252 -dwal SUPRNOVA-ACCOUNT.SUPRNOVA-WORKER -dpsw SUPRNOVA-WORKER-PASSWORT

Möchtet ihr nur Ethereum im Single-Mining-Modus schürfen, verwendet ihr folgenden Code:

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eu1.ethermine.org:4444 -ewal 0x1F7cf431E3BDf966142d3256D4dc59B0cXXXXXXX.FREIERPCNAME -epsw x

Denkt daran, dass ihr den Code an euren Ethereum Account (Wallet) sowie euren Spurnova Account anpassen müsst. Sind alle Einstellungen korrekt, sollte sich der Claymore Dual-Miner starten und euch detaillierte Informationen zum aktuellen Mining-Status eures Systemes zeigen. Bei Fehlern solltet ihr die Log-Dateien im Hauptverzeichnis des Claymore Dual-Miners mit einem Texteditor öffnen und analysieren.

Speicher übertakten mit dem MSI Afterburner

Wir haben unsere Grafikkarten mit dem MSI Afterburner (

Der MSI Afterburner lässt sich automatisch mit Windows starten und kann die gesetzten Einstellungen auf alle Grafikkarten des gleichen Typs im System automatisch anwenden.

Stromverbrauch und aktueller Gewinn

Unser Testsystem benötigt während des Schürfens ca. 850 Watt. Das sind ca. 135 Watt pro Grafikkarte plus 40 Watt Energie für das Grundsystem. Im 24/7 Einsatz haben wir folgende Werte ermittelt:

ZeitraumEther (180 MH/s)EtherwertStromkostenGewinn
Tag0.073617,30 Euro5,70 Euro11,60 Euro
Woche0,5152121,07 Euro40,00 Euro81,07 Euro
Monat2,2374525,80 Euro173,30 Euro352,50 Euro
Jahr26,86406313,04 Euro2080,50 Euro4232,54 Euro

Bitte bedenkt, dass sich die geschürften Ether mit höherer Schwierigkeit verringern können. Für die Berechnung der Stromkosten haben wir 0,28 Euro pro Kilowattstunde zugrunde gelegt, Ethereum wurde am 06.07.2017 mit 235 Euro pro 1 Ether gehandelt.

Fazit

Ein Mining-System aufzubauen erfordert eine intensive Vorbereitung und auch Kapital, denn unser Testsystem kostet immerhin 3600 Euro. Wir haben uns hier mit den GeForce GTX 1070 für die zwar teuren aber aktuell effizientesten Grafikkarten für Ethereum entschieden, die auch die besten Zukunftsaussichten in Bezug auf kommende DAG-Epochen von Ethereum bieten.

Ethereum schwankt (wie andere virtuelle Währungen auch) sehr stark und es ist unvorhersehbar wie sich die Schwierigkeit in den nächsten Monaten erhöht. Daher ist es schwer zu errechnen ob und wann sich ein Investment in Mining-Hardware lohnt. Zusätzlich ist die Hardware im 24/7 Betrieb natürlich stark gefordert und könnte nach einigen Monaten oder Jahren kaputt gehen. zum Glück gibt es auf aktuelle Grafikkarten meist 3 Jahre Garantie. Wir haben unser Testsystem komplett selbst erworben und werden euch über die nächsten Monate auf dem Laufenden halten.

Bei allen grünen Links, die mit einem * gekennzeichnet sind, handelt es sich um Amazon-Affiliate-Links. Bei einem Kauf über einen dieser Links erhalten wir von Amazon eine Provision.

Due to the rising prices of many cryptocurrencies, mining is currently also worthwhile again with local electricity prices. Due to the very high electricity costs in international comparison, mining in Germany was quite uninteresting for a long time. We have built a 6-GPU dual-mining system to mine Ethereum or its currency (the second most common cryptocurrency behind Bitcoin) and Decred as a second currency. A cryptocurrency is a virtual and decentralized system in which an almost infinite number of participants verify all transactions and thus ensure the integrity of the system. All transactions are listed chronologically, making the system transparent and forgery-proof. Since these calculations are very computationally intensive, this provides protection against manipulation. If you wanted to bring in a wrong transaction, you would have to have more computing power than the entire network, which seems almost impossible with larger currencies like Ethereum.To generate (mine) a cryptocurrency, complex mathematical puzzles have to be solved, which are very time-consuming and with become increasingly difficult over time. With GPU mining, the computing processes are not carried out by the processor, but passed on to the graphics cards installed in the system. Due to the graphics card architecture and the high memory bandwidth, this makes sense with Ethereum, for example, because Ethereum’s algorithm is designed in such a way that so-called application-specific integrated circuits (ASICs) cannot be used sensibly. An ASIC is a piece of hardware made for one purpose only (optimized for software). Since ASICs completely displace normal PCs/graphics cards and thus normal miners (as was/is observed with Bitcoin), the goal was to develop Ethereum in such a way that it is very difficult to use an ASIC system. The computing power of a system is MH/s (megahashes per second) measured. Graphics cards with fast memory such as the AMD Radeon 470/480 or 570/580 or the latest Nvidia GeForce GXT 1060/1070 are suitable for Ethereum mining. The latter can be operated quite energy-efficiently with a reduced power target of 70-75% and an increased memory clock. Therefore, despite the higher price compared to the AMD Radeon, the Nvidia GeForce GTX 1060/1070 graphics cards can still be worthwhile. Although the AMD Radeon 470, 480, 570 and 580 are currently among the most popular Ethereum mining graphics cards due to their low price, it looks like the Nvidia GeForce GTX 1060/1070 will soon take the lead. First of all, as already mentioned, the GeForce graphics cards are a bit more efficient (more megahashes per watt), but the observed hash rate drop of the AMD graphics cards is much more important. Because with each DAG epoch, which currently increases by one counter every 4 days and increases the Ethereum difficulty, the hash rate of the AMD graphics cards decreases slightly, which will lead to a performance reduction of just over 15% in the next 3 months. As early as the end of 2017/beginning of 2018, the AMD Radeons could drop to 50% of their current performance. Legitreviews has a detailed test on the effects of future DAG epochs published. There they come to the conclusion that AMD Radeon cards will be severely affected, while the Nvidia GeForce GTX 1060/1070 deliver practically unchanged hash rates. However, it is still unclear how the new AMD Radeon RX graphics cards will scale with new DAG epochs. Since the performance also differs from model to model (e.g. the built-in memory is important here) and the mining software (version) used also differs plays a major role, the above values ​​should only be seen as a guide. Deviations of up to 10% are quite possible. Ethereum currently has a Proof of work (PoW) system similar to Bitcoin, in which the miner (or pool) is rewarded for first calculating the next block, which depends on the current difficulty must meet criteria and is considered valid. The development team behind Ethereum would like to switch to a hybrid of Proof of work (PoW) and Proof of stake (PoS) with the next release (Metropolis) in 2017. A small percentage (currently 1%) of the blocks does not have to are no longer searched for by the miners, but is allocated to an account in the network according to certain criteria. To do this, members must issue ether (the currency of Ethereum) to virtual miners, which is lost in certain cases (choosing the wrong blockchain). Which the future blockchain is also depends on the amount of ether connected to that blockchain. It is hoped that this hybrid system will reduce Ethereum’s energy consumption, since the virtual selection of the right blockchain naturally requires significantly less computing power. However, since this system is very complicated and theoretical, it is quite possible that a release will be a long time coming after 2017. We have therefore opted for 6 graphics cards of the type MSI GeForce GTX 1070 Armor OC 8GB*, where we overclocked the memory clock by about 10% (more on that later). Since the processor is not required, the small and frugal Intel Pentium G4560* from the current Intel Kaby Lake generation is sufficient. The second most important Hardware component in our system is the power supply. Since the system runs around the clock, an economical (80+ platinum certified) and at the same time powerful power supply is required. We chose the be quiet! Dark Power Pro 11 1200W*, which has enough power to supply our 6 graphics cards with energy. Alternatively, it is also possible to use two smaller-sized power supplies in parallel, which can be somewhat cheaper depending on the manufacturer. We use PCIe risers so that 6 dual-slot graphics cards fit on a normal mainboard. Specifically, here we use PCIe x1 to PCIe x16 USB 3.0 riser with SATA power. The bandwidth of PCIe x1 is completely sufficient for mining here, because the calculations are only made on the graphics cards. In order for the BIOS to recognize all six graphics cards, the PCIe speed must be switched from Gen2 to Gen3. This does not have a negative impact on the mining speed. The bios of our MSI Z270-A Pro* mainboard also has a mining function that provides extended system resources for the graphics cards will. One must not forget that the system has a gigantic 48GB of graphics memory. A 64-bit operating system is therefore also required, since 32-bit systems cannot manage sufficient resources. We recommend Windows 10 Pro* 64-bit or e.g. Ubuntu Desktop 16.04 ( Download ). We will not go into detail about the installation of the operating system here. If you use AMD graphics cards, you can alternatively buy the preconfigured ethOS (approx. 40 euros), which is based on Linux. As of June 2017, the hash rates achieved under Linux and Windows 10 (Build 1703) are roughly the same. Since we think Windows is more suitable for beginners, we use Microsoft’s operating system in our test system. After you have installed Windows 10 (64bit version), you should check that Windows Update has downloaded and installed all updates. In addition, the latest Nvidia G-Force graphics card driver should be downloaded ( Download ). Checks in the device manager whether Windows has really recognized all graphics cards. It took us several restarts for Windows 10 to correctly install all six graphics cards. If you use more than one graphics card, you should also set the Windows virtual memory (swap file) to at least 16,000 MB, we used 25,000 MB here Now that the operating system is installed, updated and set up, we first need to download Geth ( Download ). Geth is available for Linux, Windows and MacOS. Geth is required to download the Ethereum blockchain to the PC and to create an Ethereum account. By creating an account, a wallet is created, i.e. a digital wallet into which our generated ethers migrate. Starts a Windows console window (Windows key + R and then enter “cmd”). Changes to the installation directory of geth. With the command you can create a new account and password. Make a note of your password, without a password you will not be able to access your wallet later. Geth also creates a keystore file (UTC). This is stored in the path. Make a good backup of this file, preferably on another data medium. You can now download the Ethereum blockchain (currently around 60GB) onto your PC. This is necessary if you want to have a local wallet. This is the safest, especially if you later want to hoard larger amounts of virtual currency there. If you are planning to exchange the generated ethers for hard currency (e.g. euros) very quickly anyway, a web wallet such as MyEtherWallet is sufficient local wallet, you have to download the Ethereum blockchain to your computer via geth. This process can be accelerated with the additional parameter, then geth only downloads the headers. All commands are described here To access your Ethereum wallet, you can, as already mentioned e.g. use MyEtherWallet. Select here as access method. geth created this file locally on your system. You will need your personal password to decrypt the file. Here you will also find your Ethereum wallet address (see image no. 2), which you must enter in the BAT file of the mining software. If you want to mine two currencies at the same time (in our In the case of Ethereum and Decred), you need the Windows software Paymetheus to create a Decred account (wallet), similar to Ethereum before. Under the point you can create an address that you then enter in your pooling account. We will introduce you to the Suprnova pool later. You can find complete instructions for Paymetheus directly in the Decred HowTo If you want to generate Ethereum successfully and efficiently, you have to use a pool to join. Thousands of computers are united in a pool, which then dig together for the currency. If a currency unit is successfully calculated, it is divided among all members of the pool who were involved in the creation. The distribution takes place according to the computing power provided and is usually made several times a day. The pool retains a small fee of usually 1% for each distribution. A current overview of all active pools and their total computing power can be found here One of the largest pools is currently ethermine. org , which has a total computing power of 12 TH/s. That’s almost 70,000 systems with a computing power of 180 MH/s (that’s what we achieve with this test system). The fee is a fair 1%, the uncle rate is under 7%. An uncle is a fork of the original chain that only gets paid very little (1/32). In addition to an Android app, the pool also has a Telegram bot and DDOS protection for the servers to avoid unnecessary downtime. Each pool offers anonymous statistics. In addition to the current and average hash rate, you can also see how much credit (in Ether / Bitcoin or USD) you have already earned. By default, ethermine.org pays out the credit as soon as 1 ether (currently equivalent to around 200-300 euros) has been collected. However, an earlier payout from 0.05 Ether (currently around 10-15 euros) is possible, but there is a small fee. Under this point you should regularly check that not too many come together. This refers to transmitted blocks that you have correctly calculated, but which have now become invalid (and are therefore not remunerated). Although you have no direct influence on the number of stale shares, a percentage greater than 5% indicates problems with your mining hardware. Reasons for a high stale share rate can be, for example, a slow / unstable internet connection or slow hardware. For the Decred secondary currency, we joined the Suprnova.cc mining pool affiliated that charges a 1% fee. This pool requires an account, which you can create on the Suprnova website. In this account you then have to create a worker (a separate ID for each mining PC) and enter your Decred address for payouts. Now, of course, we still need the actual mining software. We chose the Claymore dual miner ( Download ). The Claymore Dual Miner supports (as the name suggests) so-called dual mining. This means that the software can mine two currencies at the same time, however, the yield of the main currency suffers somewhat (in our case, the hash rate of ETH decreased by about 5%).In our system with 6 GeForce GTX 1070, this means a decrease in earnings by around 30 euros, but we also earned Decred with a value of around 60 euros. You have to decide for yourself whether the additional net profit of around 30 euros or 5% of the additional effort of dual mining is worth it, because in the end there are also transaction costs when converting ETH/Decred to Bitcoin or euros, what further reduces the lead of dual mining. Optionally, you can also use our instructions for single mining. In addition to Ethereum (or Ether), you can also dig for Decred, Siacoin, Lbry or Pascal coins, for example. However, the second currency is not mined at full speed, because then the speed of the main currency would deteriorate rapidly. In practice, the mining speed of the second currency is around 15% of what is actually possible. The software supports the single mining mode (1% fee), in which only Ethereum is mined, and the dual mining mode with a 2% fee. The software collects the fee itself by automatically digging once an hour for 36 (1% fee) or 72 seconds for the developer. According to the website, WhattoMine is currently worthwhile .com for our system next to Ethereum most likely LBRY, followed by Decred, Pascal and Siacoin. We decided on Decred, the exchange rates for the currencies fluctuate a lot and in the long run we think Decred is the (currently) best second currency next to Ethereum. WhattoMine offers its own dual mining calculator In order to mine Ethereum and Decred at the same time, we start the Claymore dual miner using a BAT file with the following content: Would like If you only mine Ethereum in single mining mode, you use the following code: Remember that you have to adapt the code to your Ethereum account (wallet) and your Spurnova account. If all settings are correct, the Claymore Dual Miner should start and show you detailed information about the current mining status of your system. In the event of errors, you should open and analyze the log files in the main directory of the Claymore Dual-Miner with a text editor. We downloaded our graphics cards with the MSI Afterburner ( ) overclocked. The MSI Afterburner not only ensures a higher mining speed, but also saves energy by lowering the power limit to 75%. Lowering the power limit does not reduce the Ethereum mining speed, but it does reduce the power consumption and temperature of the graphics cards. In the end, we only overclocked the memory of the graphics card by about 500 MHz, because this has a strong effect on the mining speed (about +10%). The MSI Afterburner can be started automatically with Windows and can apply the settings to all graphics cards of the of the same type in the system automatically. Our test system requires approx. 850 watts during prospecting. That’s about 135 watts per graphics card plus 40 watts of energy for the basic system. In 24/7 use, we determined the following values: Please consider that the mined Ether can decrease with higher difficulty. We used 0.28 euros per kilowatt hour to calculate the electricity costs, Ethereum was traded at 235 euros per 1 ether on July 6th, 2017. Setting up a mining system requires intensive preparation and also capital, because our test system costs 3600 euros . With the GeForce GTX 1070, we have decided on the expensive but currently most efficient graphics cards for Ethereum, which also offer the best future prospects in relation to Ethereum’s upcoming DAG epochs. Ethereum (like other virtual currencies) fluctuates very strongly and it is unpredictable as the difficulty increases over the next few months. It is therefore difficult to calculate whether and when an investment in mining hardware is worthwhile. In addition, the hardware is of course heavily used in 24/7 operation and could break after a few months or years. Fortunately, current graphics cards usually come with a 3-year guarantee. We purchased our test system ourselves and will keep you up to date over the next few months.


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