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BTCW OpenCL GPU Miner

High-performance OpenCL GPU miner for Bitcoin-PoW (BTCW). Works with both NVIDIA and AMD GPUs on Windows and Linux.

v26.5.4OpenCL

Coming Soon

Early Access — Get Notified

The miner will be fully open-sourced in the coming days. Sign up to be notified when the source code drops and new releases are available.

6 miners have signed up!

GPU Compatibility

🟢

NVIDIA

CUDA OpenCL runtime

Fully Supported

🟢

AMD

ROCm / AMDGPU-PRO OpenCL

Fully Supported

This miner uses OpenCL, the cross-platform GPU compute standard. Unlike CUDA-only miners, it runs on any GPU that provides an OpenCL driver.

Quick Start (Pre-built Windows Binary)

1. Download the latest release

Grab the binary from the GitHub Releases page (coming soon).

2. Start your BTCW node

bitcoin-pow-qt.exe

3. Create a UTXO

Open Window → Console in the node and type:

generate

4. Start the miner

Wait for the node to begin mining, then:

cd x64\Release
BTCW_OPENCL_MINER.exe 1

The 1 selects GPU device #1. Use 2, 3, etc. for additional GPUs.

Multi-GPU Mining

Run one instance per GPU in separate terminals:

BTCW_OPENCL_MINER.exe 1
BTCW_OPENCL_MINER.exe 2
BTCW_OPENCL_MINER.exe 3

Example Output

Mining Active

BTCW.SPACE OpenCL GPU Miner v26.5.4

Hash found - NONCE: 0707070707070707
Hash no sig low64: 6bfb0091a42a80d9

CONNECTED TO BTCW NODE WALLET

=================================
Device: NVIDIA GeForce RTX 4080 SUPER
---------------------------------
Hashrate: 18415616.000000 H/s
Power: 245 W | Temp: 62 C | Fan: 55%
=================================

Not Connected

Hash no sig low64: 0000000000000000

!!! NOT CONNECTED TO BTCW NODE !!!

Make sure your wallet has
at least 1 utxo.

Building from Source

Windows

Prerequisites: Visual Studio 2022 Build Tools, OpenCL SDK (CUDA Toolkit / AMD APP SDK), PDCurses

Build PDCurses first:

git clone https://github.com/wmcbrine/PDCurses.git C:\PDCurses
cd C:\PDCurses\wincon
nmake -f Makefile.vc clean
nmake -f Makefile.vc

Build the miner:

Open an x64 Native Tools Command Prompt for VS 2022, then:

cd path\to\opencl-btcw-miner
build.bat

Edit build.bat to adjust CUDA_PATH and PDCURSES_PATH for your system.

Linux

Prerequisites:

sudo apt install build-essential ocl-icd-opencl-dev

For NVIDIA:

sudo apt install nvidia-driver-560-server nvidia-opencl-icd

For AMD: Install ROCm or AMDGPU-PRO driver with OpenCL support.

Build & Run:

chmod +x build_linux.sh
./build_linux.sh
cd release
./btcw_opencl_miner 1

Usage

BTCW_OPENCL_MINER.exe <gpu_number> [work_size]

Argument	Description
gpu_number	1-based GPU index (required)
work_size	Manual global work size override (optional, auto-tuned by default)

Project Structure

opencl-btcw-miner/
├── opencl_miner.cpp          # Windows host code (PDCurses UI)
├── opencl_miner_linux.cpp    # Linux host code (headless stdout)
├── mining_kernel.cl           # Main OpenCL mining kernel
├── kernels/
│   ├── secp256k1_field.cl     # secp256k1 field arithmetic
│   └── secp256k1_point.cl     # secp256k1 point operations
├── ecmult_gen_table.bin       # Pre-computed EC multiplication table
├── extract_table.py           # Table generation utility
├── build.bat                  # Windows build script
├── build_linux.sh             # Linux build script
└── x64/Release/               # Pre-built Windows binary
    ├── BTCW_OPENCL_MINER.exe
    └── kernels/

Important Notes

⚠

Do NOT start the miner before the node has begun mining. Run generate in the node console first.

⚠

Only run one BTCW node per machine when using this miner. Multiple nodes sharing the same shared memory will cause nonce conflicts.

⚠

The miner communicates with the node via shared memory (IPC). The node must be running on the same machine.

⚠

Kernel files (.cl) are compiled by the OpenCL runtime on first launch and cached in kernel_cache.bin. Delete the cache if you update kernel files.

Quick Start (Pre-built Windows Binary)

1. Download the latest release

Grab the binary from the GitHub Releases page (coming soon).

2. Start your BTCW node

bitcoin-pow-qt.exe

3. Create a UTXO

Open Window → Console in the node and type:

generate

4. Start the miner

Wait for the node to begin mining, then:

cd x64\Release
BTCW_OPENCL_MINER.exe 1

The 1 selects GPU device #1. Use 2, 3, etc. for additional GPUs.

Example Output

Mining Active

BTCW.SPACE OpenCL GPU Miner v26.5.4

Hash found - NONCE: 0707070707070707
Hash no sig low64: 6bfb0091a42a80d9

CONNECTED TO BTCW NODE WALLET

=================================
Device: NVIDIA GeForce RTX 4080 SUPER
---------------------------------
Hashrate: 18415616.000000 H/s
Power: 245 W | Temp: 62 C | Fan: 55%
=================================

Not Connected

Hash no sig low64: 0000000000000000

!!! NOT CONNECTED TO BTCW NODE !!!

Make sure your wallet has
at least 1 utxo.

Building from Source

Windows

Prerequisites: Visual Studio 2022 Build Tools, OpenCL SDK (CUDA Toolkit / AMD APP SDK), PDCurses

Build PDCurses first:

git clone https://github.com/wmcbrine/PDCurses.git C:\PDCurses
cd C:\PDCurses\wincon
nmake -f Makefile.vc clean
nmake -f Makefile.vc

Build the miner:

Open an x64 Native Tools Command Prompt for VS 2022, then:

cd path\to\opencl-btcw-miner
build.bat

Edit build.bat to adjust CUDA_PATH and PDCURSES_PATH for your system.

Linux

Prerequisites:

sudo apt install build-essential ocl-icd-opencl-dev

For NVIDIA:

sudo apt install nvidia-driver-560-server nvidia-opencl-icd

For AMD: Install ROCm or AMDGPU-PRO driver with OpenCL support.

Build & Run:

chmod +x build_linux.sh
./build_linux.sh
cd release
./btcw_opencl_miner 1

Argument

Description

gpu_number

1-based GPU index (required)

work_size

Manual global work size override (optional, auto-tuned by default)

Project Structure

opencl-btcw-miner/ ├── opencl_miner.cpp # Windows host code (PDCurses UI) ├── opencl_miner_linux.cpp # Linux host code (headless stdout) ├── mining_kernel.cl # Main OpenCL mining kernel ├── kernels/ │ ├── secp256k1_field.cl # secp256k1 field arithmetic │ └── secp256k1_point.cl # secp256k1 point operations ├── ecmult_gen_table.bin # Pre-computed EC multiplication table ├── extract_table.py # Table generation utility ├── build.bat # Windows build script ├── build_linux.sh # Linux build script └── x64/Release/ # Pre-built Windows binary ├── BTCW_OPENCL_MINER.exe └── kernels/

Important Notes

⚠

Do NOT start the miner before the node has begun mining. Run generate in the node console first.

⚠

Only run one BTCW node per machine when using this miner. Multiple nodes sharing the same shared memory will cause nonce conflicts.

⚠

The miner communicates with the node via shared memory (IPC). The node must be running on the same machine.

⚠

Kernel files (.cl) are compiled by the OpenCL runtime on first launch and cached in kernel_cache.bin. Delete the cache if you update kernel files.