Crypto currency mining using a computer’s central processing unit (CPU) was once the primary method for mining Bitcoin. Over the years, as specialized hardware (ASICs) and powerful GPUs took over, CPU mining became less profitable for major coins. However, in 2021, CPU mining experienced a notable resurgence due to several factors. This article covers what you need to know about crypto CPU mining in 2021, including the best coins, setup guide, and important considerations.
What Is CPU Mining?
CPU mining involves using a computer’s processor to solve cryptographic puzzles, verify transactions, and secure a blockchain network. Mining software runs algorithms such as RandomX (Monero) or VerusHash (VerusCoin) that are designed to be efficient on CPUs and resistant to ASIC and FPGA hardware.
Why Did CPU Mining Become Popular in 2021?
In 2021, a global semiconductor shortage led to skyrocketing GPU prices and limited availability. Many miners turned to CPU mining as an accessible alternative. Additionally, several new and existing cryptocurrencies adopted CPU-friendly algorithms that discouraged large-scale GPU or ASIC mining, aiming for fairer distribution. The rise of privacy-focused coins like Monero also contributed, as Monero’s RandomX algorithm specifically favors CPUs.
Best Cryptocurrencies for CPU Mining in 2021
Several coins could be mined effectively with CPUs in 2021:
- Monero (XMR) – The most well-known CPU-oriented cryptocurrency. Uses RandomX algorithm, designed to mine efficiently on consumer CPUs.
- VerusCoin (VRSC) – Employs the VerusHash 2.2 algorithm, which is CPU-friendly and also allows GPU mining but with limited advantage.
- Haven Protocol (XHV) – A Monero fork with similar CPU-friendly mining properties.
- Raptoreum (RTM) – Used GhostRider algorithm, targeting modern AMD and Intel CPUs with L3 cache.
- Litecoin (LTC) / Dogecoin (DOGE) – These can be mined with merged mining using CPUs, but profitability was low compared to other options.
How to Start CPU Mining in 2021
Getting started with CPU mining in 2021 generally involves the following steps:
- Choose a suitable coin and download its official wallet.
- Check your CPU’s capabilities and cooling.
- Select mining software (e.g., XMRig for Monero).
- Join a mining pool for consistent payouts.
- Configure the software with your wallet address and pool information.
- Start mining and monitor temperature and performance.
It is important to benchmark your CPU’s hashrate and power consumption to evaluate potential profitability. Online calculators can help estimate earnings.
Risks and Considerations
- Hardware Stress: Mining can cause excessive heat and wear on your CPU if not properly cooled.
- Electricity Costs: Profitability depends on local electricity rates; high power costs can negate earnings.
- Competition: Even CPU-only algorithms have many participants; solo mining is rarely profitable, so use a pool.
- Security: Only download mining software from official sources to avoid malware.
Frequently Asked Questions About CPU Mining in 2021
Can I mine Bitcoin with CPU in 2021?
No, Bitcoin mining requires ASICs; CPU mining is not feasible.
Is CPU mining profitable in 2021?
Profitability varies by coin, hardware, electricity costs, and market prices. Some coins like Monero could provide modest returns if you have efficient hardware and low power costs.
What is the best CPU for mining in 2021?
AMD Ryzen Threadripper and Intel Core i9 series performed well, depending on algorithm. Generally, CPUs with high cache and many cores are beneficial.
Do I need a GPU to mine with CPU?
No, CPU mining can be done independently, though a GPU can boost overall mining income.
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