XMR-Stak-NVIDIA - Monero mining software

XMR-Stak is a universal Stratum pool miner. This is the NVIDIA GPU mining version; there is also an AMD GPU version, and a CPU version.

HTML reports

The hashrate shown above was generated on an overclocked GTX 1070.

Usage on Windows

1. Edit the config.txt file to enter your pool login and password.
2. Double click the exe file.

XMR-Stak should compile on any C++11 compliant compiler. Windows compiler is assumed to be MSVC 2015 CE. MSVC build environment is not vendored.

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Windows binary release checksums

sha1sum
db795d6ac4f5debf0a476f8f4e26baa5ecaf49aa  xmr-stak-nvidia.exe
a5e957bfbf0ec172f0795e07384829a1b6a29910  xmr-stak-nvidia-notls.exe
a4c5aefbf0af000dca264c3342a68fa41fb6e272  cudart64_80.dll
d34a0ba0dd7b3b1f900a7e02772e197e974b4a73  libeay32.dll
2ee9966a0fc163da58408d91be36b84fa287c10b  ssleay32.dll

sha3sum
d3740b4046ec596cb2d9cfbc9a0e32bd5ae51fe786ba4c205f5f0166  xmr-stak-nvidia.exe
d7860e4465e1c88a5a133248afd651c2d4ef27b1eda85ceb9c8f07c5  xmr-stak-nvidia-notls.exe
571633217a1592d56239d0a55c046b0e3e38cd68548b141b830a44c6  cudart64_80.dll
133c065d9ef2c93396382e2ba5d8c3ca8c6a57c6beb0159cb9a4b6c5  ssleay32.dll
05003137a87313c81d6c348c9b96411c95d48dc22c35f36c39129747  libeay32.dll

date
Sun 23 Apr 23:23:01 BST 2017

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Compile on Linux (Debian-based distros)

GNU Compiler

    sudo apt-get install nvidia-cuda-dev nvidia-cuda-toolkit libmicrohttpd-dev libssl-dev cmake cmake-curses-gui build-essential
    cmake .
    make install

• GCC version 5.1 or higher is required for full C++11 support. CMake release compile scripts, as well as CodeBlocks build environment for debug builds is included.
• Unfortunately CUDA 8.0 does not support GCC 6 without nasty hacks. However clang 3.8+ is supported. If you have CUDA 8.0, and GCC 6 I would advise to build the miner using clang instead.

Clang Compile

    sudo apt-get install clang
    export CC=/usr/bin/clang
    export CXX=/usr/bin/clang++
    cmake .
    make install

You can find a complete compile guide under Advanced Compile Options.

Default dev donation

By default the miner will donate 1% of the hashpower (1 minute in 100 minutes) to our pool. If you want to change that, edit donate-level.h before you build the binaries.

If you want to donate directly to support further development, here are our wallets

fireice-uk:

4581HhZkQHgZrZjKeCfCJxZff9E3xCgHGF25zABZz7oR71TnbbgiS7sK9jveE6Dx6uMs2LwszDuvQJgRZQotdpHt1fTdDhk

psychocrypt:

43NoJVEXo21hGZ6tDG6Z3g4qimiGdJPE6GRxAmiWwm26gwr62Lqo7zRiCJFSBmbkwTGNuuES9ES5TgaVHceuYc4Y75txCTU

Common Issues

msvcp140.dll and vcruntime140.dll not available errors

Download and install this runtime package from Microsoft. Warning: Do NOT use "missing dll" sites - dll's are exe files with another name, and it is a fairly safe bet that any dll on a shady site like that will be trojaned. Please download offical runtimes from Microsoft above.

Advanced Compile Options

The build system is CMake, if you are not familiar with CMake you can learn more here.

Short Description

There are two easy ways to set variables for cmake to configure xmr-stak-nvidia

• use the ncurses GUI
  • ccmake .
  • edit your options
  • end the GUI by pressing the key c(create) and than g(generate)
• set Options on the command line
  • enable a option: cmake . -DNAME_OF_THE_OPTION=ON
  • disable a option cmake . -DNAME_OF_THE_OPTION=OFF
  • set a value cmake . -DNAME_OF_THE_OPTION=value

After the configuration you need to call make install for slow sequential build or make -j install for faster parallel build and install.

xmr-stak-nvidia Compile Options

• CMAKE_INSTALL_PREFIX install miner to the home folder
  • cmake . -DCMAKE_INSTALL_PREFIX=$HOME/xmr-stak-nvidia
  • you can find the binary and the config.txt file after make install in $HOME/xmr-stak-nvidia/bin -CMAKE_BUILD_TYPE set the build type
  • valid options: Release or Debug
  • you should always keep Release for your productive miners
• CUDA_ARCH build for a certain compute architecture
  • this option needs a semicolon separated list
  • cmake . -DCUDA_ARCH=61 or cmake . -DCUDA_ARCH=20;61
  • list with NVIDIA compute architectures
  • by default the miner is created for all currently available compute architectures
• CUDA_COMPILER select the compiler for the device code
  • valid options: nvcc or clang if clang 3.9+ is installed

    # compile host and device code with clang
    export CC=/usr/bin/clang
    export CXX=/usr/bin/clang++
    cmake . -DCUDA_COMPILER=clang

• MICROHTTPD_REQUIRED allow to disable/enable the dependency microhttpd
  • by default enabled
  • there is no http interface available if option is disabled: cmake . -DMICROHTTPD_REQUIRED=OFF
• OpenSSL_REQUIREDallow to disable/enable the dependency OpenSSL
  • by default enabled
  • it is not possible to connect to a TLS secured pool if optin is disabled: cmake . -DOpenSSL_REQUIRED=OFF
• XMR-STAK_LARGEGRID use 32 or 64 bit integer for on device indices
  • default is enabled
  • on old GPUs it can increase the hash rate if disabled: cmake . -DXMR-STAK_LARGEGRID=OFF
  • if disabled it is not allowed to use more than 1000 threads on the device
• XMR-STAK_THREADS give the compiler information which value for threads is used at runtime
  • default is 0 (compile time optimization)
  • if the miner is compiled and used at runtime with the some value it can increase the hash rate: cmake . -DXMR-STAK_THREADS=32

Tune Performance config.txt

Choose Value for threads and blocks

The optimal parameter for the threads and blocks option in config.txt depend on your GPU. For all GPU's with a compute capability >=2.0 and <6.0 there is a restriction of the amount of RAM that can be used for the mining algorithm. The maximum RAM that can be used must be less than 2GB (e.g. GTX TITAN) or 1GB (e.g. GTX 750-TI). The amount of RAM used for mining can be changed with "threads" : T, "blocks : B".

• T = threads used per block
• B = CUDA blocks started (should be a multiple of the multiprocessors M on the GPU)

For the 2GB limit the equations must be full filled: T * B * 2 <= 1900 and B mod M == 0. The value 1900 is used because there is a little data overhead for administration. The GTX Titan X has 24 multiprocessors M, this means a valid and good starting configuration is "threads" : 16, "blocks : 48" and full fill all restrictions 16 * 48 * 2 = 1536 and 48 mod 24 = 0.

The memory limit for NVIDIA Pascal GPUs is 16 GiB if the newest CUDA driver is used.

Windows or Linux Interactive Usage

To work (surf) with you desktop system while you are running the miner you need to find a good value for bfactor and bsleep. On windows, you need to set the option bfactor and bsleep if the miner crashs shortly after starting. A good value to start on windows is "bfactor" : 6, "bsleep" : 25. To reach the maximum hash rate you must set both values to zero "bfactor" : 0, "bsleep" : 0.

PGP Key

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