Miners use hashing to solve mathematical puzzles and validate transactions In proof-of-work systems, mining relies on hashing: miners use computational power to solve mathematical puzzles, validate transactions, and maintain blockchain integrity.
As mining difficulty increased, miners moved from CPUs to GPUs As mining difficulty increased, CPUs became insufficient and miners moved to GPUs for their efficiency on these workloads.
Asics role in crypto mining ASICs are even more specialised and can be faster and more efficient than GPUs, but they are more expensive and less versatile. There is ongoing debate about proof-of-work versus alternatives like proof-of-stake, which aim to reduce energy requirements.