GPU mining is the process of using graphics processing units to validate transactions and secure a blockchain network. This technique is favored for its efficiency and capability to perform complex calculations faster than traditional CPU mining.GPUs are designed to handle parallel processing, making them ideal for the repetitive mathematical tasks required in mining. Miners use powerful graphics cards, often found in gaming computers, to solve cryptographic puzzles. Successful solving allows miners to add new blocks to the blockchain, earning rewards in the form of cryptocurrency.Many altcoins, such as Ethereum, have been mined using GPUs. However, the increasing difficulty of mining and competition has led to the rise of mining pools, where multiple miners combine their resources to increase overall chances of earning rewards. While GPU mining can be profitable, it also requires significant investment in hardware and electricity, along with ongoing maintenance and cooling considerations. As the landscape evolves, some cryptocurrencies are moving toward different consensus mechanisms, which affect the viability of GPU mining for those coins.