S19 Bitcoin miners from Bitmain dominate network hashrate, according to new research.

New research published by Coinmetrics on Tuesday revealed that three models of Bitmain mining rigs account for 76% of the computing power on the bitcoin network. The Antminer S19j Pro represents 34.3% of the network hashrate, while the S19 represents 28.1%. These have been the most commonly used machines on the network since March 2021. The Antminer S19 XP accounts for another 13.7% of the network hashrate, according to the report. The researchers determined which mining machines are being used on the bitcoin network by tracking different machines’ fingerprints using a novel methodology. Different models consume varying amounts of electricity to produce a given amount of computing power. The report also found that the energy efficiency of the network has improved by about 60% since July 1, 2018, as newer, more efficient machines have been plugged in. On average, the bitcoin network consumes 33.6 joules per terahash (J/TH) of computing power today, compared to 89.3 J/TH on July 1, 2018. However, the rate of change was more aggressive in the past, said Karim Helmy, one of the authors of the report.

The report also stated that the bitcoin network consumes 13.4 gigawatts (GW) of power, which is 13% less than the commonly used index published by the Cambridge University’s Centre for Alternative Finance.

Edited by Stephen Alpher.