An important point: when overclocking and testing, always monitor the temperature of the video card. When mining Ethereum safely, the core temperature should not rise above 65 degrees. Higher temperatures are at your own risk.
The basic setup of video cards for Ether is quite simple.
A finer tweak will give us 2-6% extra speed or 2-4% energy efficiency. We will not dwell on it in detail in this article.
Cryptocurrency miner
The above instruction works well for AMD graphics cards. For Nvidia video cards, setting up highly efficient mining is a little more complicated, so let's dwell on each series separately.
An important point when working with Nvidia cards running Windows is that initially the memory of video cards at standard frequencies allows a small number of errors that are not critical when rendering images in games, but can be critical for accurate calculations. Therefore, for the operation of CUDA systems, Nvidia engineers have provided a special mode with a reduced memory frequency (P2).
The transition of cards to this mode is carried out automatically, however, miners often want to get the maximum hash rate and seriously increase the memory frequency to values of +700, +1000 and even higher.
As a result, two factors are added – a decrease in the frequency by the P2 mode and an increase by the miner. At the same time, the miner works successfully, but when the miner is turned off, the P2 mode switches back, and the plus frequency set manually remains. This leads to frequencies that the cards cannot hold and, as a result, the driver crashes when the mining program is turned off or restarted.
Miner Nvidia
Important: changing P2 to P0 does not increase the maximum speed, but only increases stability when turning on / off / restarting the miner.
It is best to disable P2 mode for CUDA – this is done through the nvInspector utility, or rather its nvProfileInspector subroutine. We find the CUDA parameter – Force P2 state, turn it off, then start the miner.
nvProfile
Another important point: the Force P2 state parameter is restored when any new Nvidia card is installed into the system, do not forget to double-check it.
Unfortunately, the 10xx series cards were not designed specifically for mining, so at the end of 2020, the 10xx series miners faced a slight drop in speed when mining Ether.
To maintain speed, power consumption had to be raised, which significantly changed energy efficiency.
Important: on the Nvidia GTX 10xx series, with each subsequent era of Ethereum – and they change every four days – the power consumption of video cards will increase slightly up to the maximum power limit of the video card. In approximately 1.5 years, the cards will start to run into the power limit.
Miner cryptocurrency
Please note that Nvidia decided not to update the Nvidia driver for 10xx cards for Windows 7, so this system cannot efficiently mine Ether on 10xx video cards (16xx, 20xx and 30xx video cards no longer have this problem). To mine Ether on the 10xx series, use Windows 10 or Rave OS.
These cards work on the GDDR5 memory type, the overclocking algorithm is the same for them.
The speed lost at point # 2 should return completely. If you have not returned completely, you can slightly increase the Power Limit, but this will also increase the power consumption of the card.
1080 and 1080ti cards have high-timing fast GDDR5X memory, which initially significantly outperformed GDDR5 memory during Ether mining. However, the ETHlargementPill-r2 pill was released quite quickly, reducing timings for this type of memory, after which they became very effective for Ether.
The tablet makes the memory work less stable and reduces the possible maximum overclocking. For many early revisions of GTX 1080 (Rev. A) cards, the tablet is unstable even at the nominal frequencies, therefore, for the stable operation of such cards, the video card memory frequency has to be lowered .
Miner cryptocurrency
Even if lowering the frequency did not lead to stable operation of the miner program, then for such cards, instead of a tablet, you must use a soft analogue. This is the -mt parameter in the t-rex miner, which varies from 0 to 6. The higher this parameter, the more aggressive the decrease in timings – but also the lower the stability.
After successful activation of the tablet or selection of the -mt parameter, the overclocking of these cards is similar to the cards 1060 and 1070.
These cards do not have problems with placing large amounts of data in the video card memory and at the same time have very powerful cores.
The overclocking algorithm is very simple:
If an increase in PL increases the hash rate – this is true for some 2080 and 2080ti models – then we find the hash rate to which PL can be raised. Then we take the following steps.
Nvidia GeForce RTX 2070
The speed lost at point # 2 should return completely. If you have not returned completely, you can slightly increase the Power Limit, but this will also increase the power consumption of the card.
The cards 3070, 3080 and 3090 are the most capricious of all NVIDIA cards in terms of overclocking, we will dwell on them in detail.
Let’s note right away that the overclocking of the 3060 and 3060ti is similar to the overclocking of the 20xx series.
When overclocking the 3070 – like all older cards of the 30xx series – it is important to feel what the card lacks. The card consistently gives 60 MH / s, while overclocking the memory, you can stably get 63-64 MH / s. The card has a very powerful core, which is not particularly necessary for ether mining: 700-800 MHz is enough for it. Therefore, the card’s gluttony can and should be limited.
Overclocking the 3070 is not difficult: first of all, we overclock the memory to a stable maximum, then lower the PL.
Nvidia GeForce RTX 3070
At some point, when PL is lowered, the core frequency can start "jumping", periodically dropping below 1 GHz and returning back in a second. This means that the card does not have enough power limit..
This effect is called “trotting” (from the English verb “slow down”). An important point: at the same time, t-rex miners and others can show high speed, but the effective speed will be 4-5 MH / s lower than the displayed one.
When the card heats up and the fans are overclocked, the PL should be slightly increased. This is due to the fact that the fan consumption of Nvidia cards is also taken into account in PL and the card core may start running out of the remaining power.
Nvidia GeForce RTX 3070
Conclusion: Do not restart PL. Normal consumption of 3070 when mining is 130 watts at 63 MH / s speed.
The best results can be obtained on Windows 7 by fixing the core voltage in the region of 713-725 mV and lowering the core frequency. With good memory, we get a consumption of 121 W at 64.
6 MH / s speeds. This is a t-rex excluding devfee.
If you use the fixation of the mode in the nvidia inspector (command -forcePState: 0,0), then you can get 61 MH / s at 107 W or 570 MH / s at 1 kW of power. But in this case, after the reboot, you will first have to restore the operating mode, and only then turn on the mining, otherwise the driver will fly cyclically. In this case, saving 10 W from the card is not practical.
When overclocking the 3080 – like all older cards of the 30xx series – it is important to feel what the card lacks. The 3080 card has a very powerful core, which is redundant for ether mining, so first of all we limit the core as much as possible – without throttling – and only then we overclock the memory.
Windows overclocking.
Nvidia graphics cards
Then there are two options.
After that, you can add the core a little and check that the speed does not increase from this. If the speed increases, then we add the core, the main thing is not to reach the next option.
The overclocking principle of the 3090 does not differ from the 3080 in any way, you just need to initially assume that the 3090 behaves like an overclocked 3080 with a weak power supply.
The Kawpow algorithm, the main currency of which is RVN, has burst into mining quite brightly. To illustrate the growing popularity of cryptocurrency, we present the graph of the Ravencoin hash rate on the 2Miners pool: over the month, the indicator has grown approximately five times.
Ravencoin hash rate of 2Miners
At the same time, the RVN rate jumped more than 500 percent in thirty days. On February 20, 2021, he set a record at 28.5 cents.
The algorithm still works even with video cards with 3 GB of memory, it is not capricious (moreover, many capricious cards on other algorithms work confidently on kawpow), and the speed correlates well with the level of PL cards. Finally, RVN is listed on many major exchanges.
By a combination of factors, this algorithm confidently ranks second in importance and profitability after Ethash for mining on video cards.
Miner Ravencoin
For Windows 10, video cards with 4 GB or more memory are required. For Windows 7 and Rave OS, 3 GB of memory on the card is sufficient.
Setting up video cards for KAWPOW is quite simple.
Cryptocurrency miners
A finer tweak will give us 2-6% extra speed or 2-4% energy efficiency.
Therefore, we will not dwell on it in detail in this articleсекретами заходите к нам в Телеграм-чат.
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