Efficiency of bitcoin mining hardware

Sources

IEA analysis based on ASIC Miner Value, 2019 (https://www.asicminervalue.com); Bitcoin Wiki, 2019a (https://en.bitcoin.it/wiki/Mining_hardware_comparison), 2019b (https://en.bitcoin.it/wiki/Non-specialized_hardware_comparison); blockchain.info, 2019a (https://www.blockchain.com/charts/market-price), 2019b (https://www.blockchain.com/charts/hash-rate)

Notes

CPU = central processing unit; GPU = graphics processing units; FGPA = field-programmable gate array; ASIC = application-specific integrated circuits; TH/s = terahash per second; MH/s = megahash per second; MH/J = megahash per joule