Riot Blockchain (RIOT) jumps 11% in after-hours trading after the company purchases an additional 1,040 next-generation Bitmain S19 Antminers for $1.9M.That comes after its April 30 announcement that it bought 1,000 S19 Pro miners.The purchases were funded from Riot's available cash on hand. Riot anticipates that the total 2,040 new S19 miners will be received and deployed in Q3 2020.The May 6 purchase of 1,040 S19 Antminers have a hash rate of 95 TH/s and an energy efficiency of 34.5±% 5 joules per terahash.
