Cpuminer GR is a free, open-source command-line miner that uses your computer's processor rather than a graphics card. It is aimed at hobbyists and technically minded users who want to try CPU mining on Windows, particularly with the GhostRider algorithm associated with the Raptoreum network.
The program is a fork of cpuminer-opt, which itself builds on the older cpuminer-multi project and incorporates optimizations contributed by several independent developers. Its focus is squeezing as much performance as possible from modern x86-64 processors. Keep in mind that the latest release dates from January 2022, so check the project page for newer activity before you commit to it.
What Is CPU Mining and Why Use a Processor?
CPU mining means using a computer's central processor to validate transactions and earn rewards on a blockchain network. Before graphics cards became dominant, most miners worked this way, and a few algorithms were designed so that ordinary processors remain competitive against specialized hardware.
For a home PC, CPU mining is less about profit and more about learning. You can observe how hashrate changes with different settings, how pools distribute work, and how an algorithm uses memory and instruction sets. Cpuminer GR is well suited to that kind of experimentation because its behavior is transparent and its options are exposed directly.
Who Is Cpuminer GR For?
The program is most useful for people who already understand the basics of mining: they know what a wallet address is, how a pool account works, and why hashrate and power consumption matter. Developers and students exploring proof-of-work algorithms will also find the open source code helpful for study.
Beginners who expect a click-and-earn experience may find it frustrating. The command-line interface, the long tuning phase and the need to verify your own setup all require patience. A graphical miner or a managed mining pool service might be a gentler starting point.
Understanding the GhostRider Algorithm
GhostRider is the algorithm associated with the Raptoreum network, and it is the main reason this fork exists. Algorithms like this are designed to favor general-purpose processors over specialized ASIC hardware, which is why CPU miners of this kind remain relevant.
When evaluating any algorithm, look at how memory-intensive it is and how it reacts to cache size and instruction support. Those factors determine how much a given processor can achieve, and they are why two CPUs with similar core counts can deliver noticeably different results.
Real-World Use Cases
Some users run Cpuminer GR on a spare desktop to test their hardware under sustained load. The output shows whether cooling, power delivery and memory speed hold up over a long session, which is useful information even if the mining income is small.
Others use it in a lab or classroom setting to demonstrate how proof-of-work works. Because the code is open, instructors can point students to the exact optimizations that affect performance, making it a practical teaching aid.
Key features
Optimized for x86-64 CPUs
Support for newer instruction sets
Stratum pool connectivity
Command-line control
Built-in tuning process
Supported coins
The documentation mentions Bitcoin (BTC) and Ethereum (ETH) in connection with the program, and the main algorithm it is built around is CryptoNight. The fork itself is most closely associated with the GhostRider algorithm used by the Raptoreum network. Check the project's documentation for the current list of algorithms before relying on any specific one.
How to install Cpuminer GR on Windows
- 1
Download the program
Get the Windows build from the official GitHub repository at https://github.com/WyvernTKC/cpuminer-gr-avx2. Open the Releases section and download the archive for version 1.2.4.1 or the build that matches your processor. Avoid copies from unknown file-sharing sites.
- 2
Verify the file
Compute the SHA-256 checksum of the downloaded archive using PowerShell with the command Get-FileHash, then compare the result with any checksum published on the release page. If the values do not match, delete the file and download it again.
- 3
Extract the archive
Unpack the archive into a dedicated folder such as C:\Miners\cpuminer-gr. Keeping it in its own directory makes it easier to manage configuration files and log output later.
- 4
Read the documentation
Open the included release notes and the Windows installation guide. The project describes installation in its INSTALLWINDOWS file and tracks changes in RELEASENOTES, so review both before your first run.
-
Run a first test
Open a command prompt in the program folder and start the miner with a small test configuration. Watch the output for connection errors and hashrate figures before leaving it running unattended.
System requirements
- A 64-bit x86-64 processor with at least SSE2 support
- 64-bit Windows operating system
- Stable internet connection for pool communication
- Adequate cooling, since sustained CPU load generates significant heat
How to use Cpuminer GR
Running Cpuminer GR is a matter of building a correct command line. Before you start, you need a wallet address for the coin you intend to mine and the address of a pool that supports the relevant algorithm. Mistyped addresses are a common cause of lost earnings, so double-check them carefully.
The usual workflow looks like this:
- Open a Windows command prompt in the folder where the miner is extracted.
- Enter the algorithm, pool URL, port, wallet and worker name as parameters.
- Allow the initial tuning process to complete, which can take well over an hour on AVX2 hardware.
- Monitor the hashrate and any reject counts in the console output.
- Check your pool dashboard to confirm that shares are being accepted.
- Stop the miner cleanly when you need to change settings, and restart it with the updated parameters.
Pros & cons
- Free and open source, so the code can be audited
- Optimized for modern CPU instruction sets
- Supports encrypted stratum connections
- Transparent command-line behavior with few hidden features
- Useful for learning how CPU mining works
- Last code update dates from January 2022
- Command-line interface is unfriendly to beginners
- Long tuning process before reaching stable performance
- Earnings on a typical home CPU are usually modest
- Requires manual verification of downloads and configuration
Is Cpuminer GR safe?
Mining software handles your wallet address and interacts with network connections, so treat the download with care. Obtain the program only from the official GitHub repository, verify the SHA-256 checksum against the published value, and do not run builds from unofficial mirrors. Never enter a seed phrase or private key into any program or website that asks for it, because a legitimate miner needs only a public wallet address.
Antivirus tools sometimes flag mining software as suspicious, largely because miners use significant CPU resources and communicate with pools. If your protection raises an alert, verify the file's checksum first and add a targeted exception if you are confident in it. Do not turn off your security software entirely. The project's last update is from 2022, which is another reason to review the code and the repository's activity before running it on a machine that holds important data.
- Official source only. Download from github.com/WyvernTKC/cpuminer-gr-avx2. Ignore ads and lookalike domains.
- Check the SHA-256. Compare the installer hash with the value the developer publishes before running it.
- Never share your seed phrase. No developer, support agent or website — including CryptApps — will ever ask for it.
Alternatives
Cpuminer GR differs from GPU-focused miners such as T-Rex Miner and BzMiner, which are built to extract maximum performance from graphics cards and generally deliver far higher hashrates on compatible hardware. If your system has a capable GPU, those tools are likely to be more productive. Cpuminer GR is the better fit when you want to use a processor, test CPU performance, or study the code behind a CPU-oriented algorithm.
Compared with projects like RustChain, which rewards vintage hardware under a different consensus model, Cpuminer GR stays within conventional proof-of-work mining on modern processors. Quai GPU Miner and its archived or back-up versions are also command-line tools, but they target GPU-based workloads. Choose based on the hardware you own and the networks you want to support.
Specifications
- Price
- Free
- Type
- Open source
- License
- —
- Latest version
- 1.2.4.1
- Last update
- 11 Jan 2022
- Windows support
- Yes (Windows build or installer)
- Source code
- github.com/WyvernTKC/cpuminer-gr-avx2
Frequently asked questions
Yes. Cpuminer GR is free and open source, and it is distributed through its official GitHub repository. You do not pay a license fee to download or run it. Any pool fees or network costs depend on the services you choose to use separately.
Yes, the project provides a Windows build for 64-bit systems. You run it from a command prompt, and the installation guide in the repository explains the setup steps. Make sure your processor supports at least SSE2 before you begin.
It can be, if you take precautions. Download only from the official GitHub repository, verify the SHA-256 checksum, and avoid third-party sites. Because the project has not been updated since January 2022, review the code and recent activity before trusting it with a machine that holds important data.
The miner tests various settings to find the configuration that works best with your specific processor. On non-AVX2 CPUs this takes about 69 minutes, and on AVX2 CPUs roughly 155 minutes. Let it finish before judging performance, since the early results are not representative.
The minimum requirement is a 64-bit x86-64 CPU with SSE2 support. Newer processors that offer AES, AVX, AVX2, SHA, AVX512 or VAES can benefit from optimized code paths on supported algorithms, which generally improves results.
The documentation mentions Bitcoin and Ethereum in connection with the program, but CPU mining of these networks is rarely profitable for home users because specialized hardware dominates them. The fork is most relevant to the GhostRider algorithm. Check current network conditions before you decide what to mine.
No. The program is designed to run on the CPU and does not require a graphics card. The OpenCL and AMD references in the project concern other mining tools or configurations, so a standard processor is enough for this miner.
Verdict
Cpuminer GR is a sensible choice for technically confident users who want a free, open-source way to mine with a processor and to understand how CPU-based proof-of-work behaves. It rewards careful setup and patience, and it is not a shortcut to meaningful income on an ordinary home computer. Beginners and anyone seeking a polished interface should look elsewhere. Before installing, confirm the project's current status and download only from its official repository.