Crypto miner Riot Platforms has bought another 66,000+ machines as part of a deal with MicroBT that could ultimately help the company eclipse 100 exahash per second (EH/s) in mining capacity. 

The buy of MicroBT M66S model machines for $290.5 million is the largest hash rate purchase in Riot’s history, Riot CEO Jason Les said in a statement Monday. It amounts to approximately 18 EH/s of mining capacity.

The Colorado-based miner, which operates mainly in Texas, had 11.7 EH/s of deployed hash rate as of Oct. 31.

Its latest buy comes after Riot made a deal in June with the China-based bitcoin miner manufacturer in June to buy 33,280 machines — the initial order in what the company…

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