Cpuminer Multi is a free, open-source mining program that uses your processor instead of a graphics card to mine several cryptocurrencies. It suits hobbyists who want to try CPU mining on a Windows PC, and developers who want to see how different proof-of-work algorithms behave on ordinary hardware.
Before you download it, know that this project is no longer maintained. Its last code update was on June 20, 2021, and the latest release is v1.3.5-multi. Do not expect fixes or updates for recent changes. Treat it as a legacy tool, and read the safety notes below before you run anything it produces.
What Is CPU Mining and Who Is Cpuminer Multi For?
CPU mining means using the central processor of a computer to perform the hashing work that secures a proof-of-work blockchain. Miners compete to find valid hashes, and the network rewards the successful ones. Graphics cards and specialized ASIC devices are usually much faster for this work, which is why CPU mining is mostly a niche activity today.
Cpuminer Multi is aimed at a few groups of people. Hobbyists with a spare desktop may want to see how mining software behaves on the hardware they already own. Students and developers often use mining code as a way to learn about hashing functions, thread management and the way pools assign work.
The program is not designed for large-scale operations. It does not manage fleets of machines, and it has no recent updates. If your goal is a serious mining setup, you will want to look at actively maintained software and at the economics of your hardware and electricity costs, which this page does not evaluate.
How Multi-Algorithm CPU Mining Works in Practice
Every cryptocurrency network chooses a specific hashing algorithm for its proof of work. Bitcoin uses SHA-256, while Monero relies on CryptoNight. Some networks use Scrypt or X11. A miner must implement the exact algorithm a network requires, or its hashes will be rejected.
A multi-algorithm miner packs several of these implementations into one program. You select the algorithm that matches your target network, then connect to a pool or a node that accepts that work. The software reports hashrate, which is the number of hashes it computes per second, along with accepted and rejected shares.
Hashrate is a useful measure for comparing setups, but it is not the same as earnings. Earnings depend on network difficulty, coin prices, pool fees and power consumption. When you test a CPU miner, record the hashrate, the temperatures and the electricity use together, so you can judge the results based on your own data.
Practical Scenarios for a CPU Miner
One common scenario is a test rig. Someone building a new machine may run a CPU miner for a few days to check stability, thermal performance and fan behavior under sustained load. A miner is a demanding workload, so it can reveal cooling problems that ordinary office tasks never trigger.
Another scenario is an older computer that no longer has a useful graphics card. A processor with AVX support can still run the program, though the hashrate will usually be modest. Many users in this situation treat the machine as a low-power experiment rather than a source of income.
A third scenario is education. Teachers and self-taught developers can use the open source code to explain how hashing functions differ, why memory-hard designs such as yescrypt were created, and how instruction sets influence speed. Reading the code on GitHub, rather than only running it, gives a clearer picture of the algorithms.
Key features
Many algorithms in one program
Keccak family support
Heavy, Luffa, Rainforest and Shavite support
yescryptR8, yescryptR16 and yescryptR32 variants
Optimized for AVX instruction sets
Builds for Windows, macOS and Linux
Open source under GPLv2
Supported coins
The miner is commonly associated with several coins and networks, including Bitcoin (BTC), Litecoin (LTC), Monero (XMR), Dogecoin (DOGE), Ravencoin (RVN), Vertcoin, Groestlcoin and Peercoin. The main algorithms it implements include SHA-256, Scrypt, CryptoNight and X11, alongside the keccak, luffa, shavite3 and yescrypt families. A listed coin does not guarantee that the miner will be competitive on that network, since most large networks now favor specialized hardware.
How to install Cpuminer Multi on Windows
- 1
Open the official release page
Go to the project's GitHub Releases page at github.com/tpruvot/cpuminer-multi/releases. Download only from the official website or this GitHub Releases page, and avoid mirror sites that offer the same file under a different name.
- 2
Choose the Windows build
Each release lists its files by platform. Pick the Windows build, which may be provided as an installer or as an archive. Note the version number, which should be v1.3.5-multi for the latest release at the time of writing.
- 3
Verify the file before running it
If the release page or its notes publish a SHA-256 checksum or a signature, calculate the hash of your downloaded file with a tool such as PowerShell's Get-FileHash and compare the two values. A mismatch means the file should not be used. Keep the file in your downloads folder until verification is complete.
- 4
Install or extract the program
Run the installer, or extract the archive to a dedicated folder such as C:\Mining\cpuminer-multi. A separate folder makes it easier to keep your configuration and logs organized and to remove the program later.
- 5
Check your processor and operating system
Confirm that your CPU supports AVX, AVX2 or XOP, and that Windows supports the same instruction sets. The miner can only use them when both sides support them, so an unsupported processor will still run the program at a lower speed.
-
Handle antivirus warnings carefully
Antivirus tools often flag mining software because miners are sometimes bundled with malware. If your protection flags this program, first check the file hash against the release page. If it matches, add a narrowly scoped exception for that single file. Never turn off your antivirus protection entirely to get the program running.
System requirements
- A 64-bit x86 processor with AVX support, which is the default build setting on x64; AVX2 and XOP are used when the processor supports them.
- An operating system that also supports the instruction sets the miner uses, since the program only takes advantage of AVX, AVX2 and XOP when both the CPU and the OS support them.
- On Linux, AVX support requires kernel version 2.6.30 or newer. On macOS, AVX support was added in the 10.6.8 update, and FreeBSD supports AVX starting with 9.1-RELEASE.
How to use Cpuminer Multi
Using Cpuminer Multi is a command-line task. The program runs in a terminal window, and you configure it through options that set the algorithm, the pool address and your account details. Before you begin, confirm that your processor supports the instruction sets you expect the miner to use.
- Open Command Prompt or PowerShell and move to the folder where you extracted or installed the program.
- Run the executable with its help option to list the available parameters and algorithm names. Read the output carefully, because the exact syntax matters.
- Choose the algorithm that matches the network you want to target. Mixing an algorithm with the wrong network will produce rejected shares.
- Enter the address of the mining pool you plan to use, following the format the pool documents for its own users.
- Provide your username or wallet details as the pool requires. Use a dedicated account, and never type a seed phrase into the miner or any website.
- Set the number of threads. Starting with a moderate value lets you watch temperatures and fan noise before increasing the load.
- Start the miner and observe the hashrate, accepted shares and rejected shares for at least several minutes before drawing conclusions.
- Stop the miner with the keyboard interrupt key in the terminal window, and check the logs for errors before the next session.
Pros & cons
- Supports many hashing algorithms in one free program
- Open source under GPLv2, so the code can be inspected
- Uses AVX, AVX2 and XOP when the hardware allows it
- Builds are available for Windows, macOS and Linux
- Useful for learning how different proof-of-work algorithms work
- No code updates since June 2021, so it is unlikely to receive fixes
- CPU mining is generally much slower than GPU or ASIC mining for most networks
- Antivirus tools may flag the program, which requires careful verification
- Command-line use is less friendly for beginners than graphical miners
- Performance depends heavily on processor instruction set support
Is Cpuminer Multi safe?
Cpuminer Multi is no longer maintained, and its last code update came in June 2021. That makes it a higher-risk choice than actively developed software. Download it only from the official GitHub Releases page, and check the SHA-256 checksum or signature if one is published. Compare the hash before running any file, and do not trust copies from third-party download sites.
Mining software can be flagged by antivirus tools, so handle warnings with care. Add a narrow exception only after verifying the hash, and never disable your protection entirely. Also, never enter a seed phrase into a miner or on any third-party website. Check the latest version on the official website before installing, because an older release is more likely to have unpatched issues.
- Official source only. Download from github.com/tpruvot/cpuminer-multi. 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 Multi differs from the other programs on this site mainly in its focus. Cpuminer OPT is also a CPU miner, but it is built around optimized algorithms for modern processors, which makes it a natural next step if you need active CPU mining. XMRig handles CPU and GPU mining with an emphasis on RandomX and CryptoNight, and it is widely used for Monero.
The GPU miners in the catalog, including GMiner, Nanominer, BzMiner and Rigel, need a graphics card to deliver useful hashrates. T-Rex and NBMiner are both NVIDIA-focused GPU miners, and their development has stopped. Cpuminer Multi's advantage is its breadth of algorithms on a processor-only setup, while its main disadvantage is its inactive development.
Specifications
- Price
- Free
- Type
- Open source
- License
- GPLv2
- Latest version
- v1.3.5-multi
- Last update
- 20 Jun 2021
- Windows support
- Yes (Windows build or installer)
- Source code
- github.com/tpruvot/cpuminer-multi
Frequently asked questions
Yes. Cpuminer Multi is free and distributed as open source under the GNU General Public License version 2. You can download the program, inspect its source code on GitHub, and modify it under the license terms. Free access does not mean the program will earn money, since mining results depend on hardware, network difficulty and electricity costs.
No. The project's last code update was on June 20, 2021, and the latest release is v1.3.5-multi. Because development has stopped, the program is unlikely to receive fixes for newer hardware or security issues. This is an important factor to weigh before you install it on a machine you use every day.
No. Cpuminer Multi is a CPU miner, so it uses your processor for hashing. If you want to mine with a graphics card, you need a GPU-focused program from another developer. CPU mining is generally much slower for most networks, so many users choose it only for testing or education.
The program implements several families, including SHA-256, Scrypt, CryptoNight and X11, along with keccak, keccakc, hefty1, luffa, rainforest, shavite3 and three yescrypt variants. The algorithms you can use depend on the network you want to target, so confirm the required algorithm name for each coin before starting.
Antivirus software often flags mining programs because they use significant processor resources and are sometimes bundled with malware. A flag does not prove the file is malicious. Verify the SHA-256 checksum against the official release, then decide whether a narrow exception is appropriate. Never switch off your protection completely to run the program.
AVX, AVX2 and XOP are processor instruction sets that let the CPU handle multiple data items in a single operation. Cpuminer Multi uses them when both your processor and operating system support them. Without them, the program can still run, but the hashrate is typically lower. Check your processor's specifications before you test.
This page cannot promise profit, and results vary widely. CPU mining is usually a low-yield activity for major networks because specialized hardware dominates them. Electricity costs, pool fees and coin prices all affect the outcome. Treat the program as a tool for testing and learning, and calculate your own costs before you consider it anything more.
Verdict
Cpuminer Multi is best suited to people who want to learn how CPU mining works, test a processor's stability under load, or study several hashing algorithms in one free program. Its open source license lets technically inclined readers review the code, and its breadth of algorithms is useful for experimentation. It is not a good fit for anyone who needs current security patches or wants to run a large mining operation, because the project has been inactive since 2021 and CPU mining rarely competes with specialized hardware.