Cryptocurrency mining uses specialized computing equipment to perform work that helps a proof-of-work network agree on valid transactions. A miner earns rewards only when network rules, pool accounting, uptime, and operating costs line up.
Start with the operating system
A mining operation is more than a machine. It includes electrical capacity, ventilation, networking, monitoring, pool configuration, and a safe shutdown process. Measure available power and cooling before selecting hardware.
Compare with consistent units
Hashrate describes work per second. Power is measured in watts. Efficiency compares the two, but its unit depends on the mining algorithm and hardware class. Never compare efficiency figures with different units as if they were equivalent.
Treat profitability as an estimate
Revenue changes with coin price, network difficulty, fees, uptime, and rewards. Electricity cost is only one expense. Use timestamped inputs, test pessimistic cases, and never treat a calculator result as guaranteed income.