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Low Power Optimized Mining of Dynex (DNX) on Windows

15, Jan 2023

There are a lot of GPU-intensive crypto coins out there that can be mined with video cards that unlike ETH/ETC and other memory-intensive algorithms do not require a lot of gigabytes of video memory or a very fast memory access speeds or clocks. One interesting such projects is Dynex (DNX) and we’ve already covered it last month as something interesting that might deserve your attention and mining power (still Nvidia GPU mining only). Now, we are going to be focusing on a different aspect of mining DNX that uses its own custom miner that unlike most other multi-mining software does not support GPU tweaking options. This means that if you do not optimize the GPUs you are using for mining you will be wasting a lot of extra power without any gain in performance and at times of lower profitability for mining this is not something you should be eager to do.

Miners that use Linux-based operating systems such as HiveOS have more options to control the operating parameters of their GPU-based mining rigs regardless of what miner software they currently employ, however Windows users are having a hard time doing the same thing. There are some useful graphical tools such as MSI AfterBurner or command-line tools such as nvidia-smi, but they are not as useful or easy to use or functional as one might think. The good news here is that Windows users might use some “cheats” in easily tweaking their mining hardware the way they want it to, regardless of the miner software they utilize.

This is possible all thanks to some of the new features introduced lately in the lolMiner mining software. These are not only the options for command line setting the GPU core clock, memory clock, power limit and the core clock offset, but also and very importantly the option to turn off the reset of overclock settings when exiting the miner. This means that you can run the lolMiner software briefly (make sure it is ran as Administrator for clock settings to work), quit it and have it leave the settings you applied for the GPU clock and then just run another miner like DynexSolve for mining DNX or just about another one. Just make sure that the mining software you run after that does not manage GPU settings on its own or does reset them to some default states as it will defeat the whole purpose.

Below you can find an example command line to run lolMiner setting the clocks on RTX 3070 GPU and then automatically exiting without resetting them back to the standard ones when exiting. Since we run lolMiner without a real KAS address it connects to the pool and then automatically exits the miner and then we run the DynexSolve miner and start mining DNX with the same optimized GPU setting that we would’ve used for mining Kaspa for instance with lolMiner. This way we get the same or maybe even higher performance with lowered power usage than if we just run the DynexSolver miner with the default settings for the GPU, just don’t forget to add your DNX wallet in the example below (do not add KAS wallet, leave the x there):

lolMiner.exe --algo KASPA --pool stratum+tcp://pool.eu.woolypooly.com --port 3112 --user x --watchdog exit --cclk 1710 --mclk 810 --coff 300 --no-oc-reset

dynexsolvevs.exe -mining-address YOUR_WALLET -no-cpu -multi-gpu -stratum-url dynex.neuropool.net -stratum-port 19331 -stratum-password YOUR_WORKER_ID -stratum-paymentid YOUR_PAYMENT_ID

The same thing can be applied to another miner and another crypto coin that is GPU-intensive and you can lower the video memory to the minimum and also decrease the operating frequency of the GPU to a lower level that it can still handle mining at with a high-enough operating frequency. This way you can go significantly lower than 100 Watts per RTX 3070 GPU and still managing to maintain the pretty much same hashrate that you would normally achieve mining at stock settings. And if the coins tolerate even higher GPU clock and that brings extra performance you can utilize the extra power usage headroom for further increasing the performance you get while maintaining much lower power usage in general.

Heatbit – A Nice Looking Heater That Mines Bitcoin

18, Nov 2022

It seems that somebody has finally made “the ultimate space heater” that can mine Bitcoin while keeping you warm. Enter Heatbit – a Bitmain Antminer S9 ASIC miner turned into a space heater with a great looking design, silent operation and mining Bitcoin while keeping you warm during the cold months. Do note that Heatbit is not being advertised as a Bitcoin miner that can keep you warm, it is just the opposite – a space heater that mines Bitcoin while keeping you warm. So, in essence it is a device to keep you warm when you need it, generating some Bitcoin while doing so to help you pay for the electricity it uses for instance, and not a Bitcoin miner that should always be kept on.

As for the claim that Heatbit is “The first heater that mines bitcoin” we cannot fully agree as there have been numerous such products over the years, though none of them apparently did get enough popularity. It is for sure not going to be the last one either on this market and lately we are seeing a lot of users also modifying the good old AntMiner S9 ASIC miners to be used as home heaters. Then there are also some mining companies that tried to advertise their ASIC miners as home heaters as well.

Heatbit was apparently conceived during the pandemic thanks to an Antminer S9 device being used by the company’s founder and apparently it has one of these legendary ASIC miners inside, but reworked to be silent and safe. Consuming up to 1.4 kW of power and able to deliver up to 14 TH/s of Bitcoin mining hashrate while operating at full capacity and being able to heat 170 square feet (about 16 square meters) according to the official specs. At full power the Heatbit should be able to operate with a noise level of below 42 dB, so it should be pretty silent, especially if you compare it to the very noisy stock AntMiner S9 ASIC that goes 80 dB or more when working.

Specifications of the Heatbit:
– Hashing power: Up to 14 TH/s
– Power Usage: 1.4 kW,
– Power: Warms up to 170 square feet, quietly
– Noise: <42 dBA - Size: 870x319x259 mm / 34,3x12,6x10,2 in - Weight: 31 lbs / 14 kg

The Heatbit is available in three different models, While and Orange for $1149 USD and a Wooden one available for $1199 USD and the device should be shipping already. You need to connect the device to a WiFi network and power in order for it to function and you can use the provided App to control and monitor how the space heater operates as well as to manage what Bitcoin it has mined so far while working. It all seems to be designed so that it can be really easy for the user as should be for a consumer product designed for more general users and not a miner targeted at more advanced users. If you are a traditional crypto miner you will most likely pass on that one as it comes quite expensive for what a S9 delivers in terms of performance and profitability though.

The App is available for both iOS and Android devices and it allows you to configure and control one or more Heatbit devices in your home or office or wherever you place them. It gives you an easy overview of how the heater is currently performing in terms of hashrate and you get to control the heat output you need between three settings – 50%, 75% and 100%. Do note that using lower heating percentage will also result in lower hashrate for the mining. The App also has a built-in wallet that allows you to manage the Bitcoin you have mined so far. There is a simple Demo mode available, so that you can check out the features of the App by downloading it even without having a Hotbit device like we did.

What we are kind of missing and would like to see as a feature is the ability to monitor the ambient heat in the location where you have the miner and a user controllable setting for a desired temperature to be kept in that room. A scheduler for when to automatically turn on and off the heater would also be quite nice to have. That is as far as heating goes, and having more stats on the Bitcoin mining part would also be nice. Things like how much it has mined so far in today, this week, this month and total etc. We know that the Hotbit is a heater first and Bitcoin miner then, and that its main goal is not to have it running at maximum level 24/7 like you would normally do with a miner, but still more stats is always nice.

– Check out the official Heatbit website for more details…

How to Lock Nvidia GPU Clock and Power Limit Under Windows with Nvidia-smi

22, Sep 2022

The Nvidia System Management Interface (nvidia-smi) is a command line utility, based on top of the Nvidia Management Library (NVML), intended to aid in the management and monitoring of Nvidia GPU devices. It has a number of useful commands for mostly monitoring the status of your Nvidia GPUs, but there are some commands that can be useful for miners as well. There are two commands that we’ll be discussing here now that can be useful to help you optimize your mining performance and while here the focus is for use under Windows, the nvidia-smi tool is also available for Linux and can be used there as well. We’ll be learning how to lock the operating frequency of an Nvidia GPU to a certain fixed value as well as how to control the power limit of that particular GPU as well and how these two commands can complement each other well in order to optimize the performance and energy efficiency of a mining rig based on Nvidia GPUs.

Fixing or locking the GPU frequency to a certain level or the power limit on an Nvidia GPU with the nvidia-smi tool on Windows requires you to start a “Command Prompt” window, but make sure you do so with Administrator privileges, otherwise you will not be able to change anything as you would not have the required permissions. The nvidia-smi tool should be included in the Path, so no need to run it from a specific location, though you might want to run it from a Batch (BAT) file in order to automate it with the start of a miner for instance. Since it requires Admin privileges you cannot set the Batch file to be executed as Admin by default, but if you make a Shortcut to the BAT file you can set the Shortcut in Windows to be ran as Administrator and that would do the job.

To set the GPU clock on Nvidia GPU using the nvidia-smi tool you need to use the -lgc parameter. So, for example to set the GPU clock to 1050 MHz you would need to run nvidia-smi -lgc 1050 as on the example screenshot above. Do note that this will be the GPU clock that your Nvidia graphic adapter(s) will be running at ONLY if they are allowed to by their power limiter at the moment, but more on that in a moment.

To set the GPU Power Limit on Nvidia GPU using the nvidia-smi tool you need to use the -pl parameter. So, for example to set the GPU Power Limit to 120W you would need to run nvidia-smi -pl 120 as on the example screenshot above. When set the Power Limit is fixed regardless of other options of the GPU.

In our example above we have set the GPU clock to 1050 MHz and the Power Limit to 120W for a mining rig with 6x Nvidia RTX 3070 GPUs, but as you can see from the NBMiner screenshot here the operating frequency is lower than the set value while the Power Limit is also reported 119W instead of 120W, but small variation here is normal. Well, the thing is that at 120W of power usage as per our limit here the said GPUs are just not able to function with such high GPU clock, but if we increase the power limit a bit more the video cards will be able to operate at 1050 MHz clock without a problem. So, what you need to make sure you do is to match well both of these parameters in order to get optimal performance with optimal power usage…

If you set the power limit to let us say 150W, but the GPU clock limit is at 1050 MHz the video cards will just consume around 130-135W and not the full 150 Watts. The trick here is to first see what GPU clock you need for the optimal performance of a certain video card, like for example the RTX 3070 (depending on the make and model and operating conditions) can require somewhere between around 850 and 1050 MHz GPU clock to give you 60 MHs of Ethash mining hashrate with 120W-130W of power usage as maximum. You just need to play around with your specific hardware a bit and see what works best and then you can automate the settings for optimal performance and power usage via the batch file you use to run your mining software.

– Some ideas on how to Monitor and Control Your Nvidia GPUs While Mining with nvidia-smi…


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