Bitcoin mining company Fortress Technologies has ordered 4,500 Bitmain Antminer S19j Pro machines as it seeks to capture a greater share of mining revenue.The purchase will more than triple Fortress’ hashrate from 195 petahash per second to 645 PH/s, the company announced Monday. A petahash is a measure of computational power.The machines are scheduled for delivery in monthly … [Read more...] about Fortress Technologies Buys 4,500 Bitcoin Mining Machines From Bitmain