Riot Blockchain is deploying its first tranche of 1,000 Antminers S19 Pros and expects its hash rate to tag 357 petahashes per second.
Source: https://cointelegraph.com/news/riot-blockchain-boosts-its-hash-rate-by-45-with-1-000-new-antminers
Riot Blockchain Boosts Its Hash Rate By 45% With 1,000 New Antminers
July 17, 2020
CoinTelegraph