Abstract: Efficiency of a mining rig is improved by altering clock speed of an ASIC. Cock speed can be modified as a function of values for (B) a block reward for mining the cryptocurrency, (R) exchange ratio of a price of a cryptocurrency reward to a currency of a country, (D) difficulty or network hashrate, and (P) unit cost of electricity used to operate the ASIC, according to the function, B×R/D?P×?E/?i+?G/?i, where for overclocking by i percentage, an effective hashrate is 1+i, Ei is a change in an amount of electricity consumed, and Gi is a degradation or economic loss of the processor. ?E/?I can be inferred from temperature measurements and historical or calculated data. A mining rig can communicate with a blockchain network via a mining pool, with information from an oracle or a centralized crypto exchange.