Secretive Chinese bitcoin mining company just revealed a new chip that could hurt AMD, Nvidia

One of Wall Street's biggest worries for @AMD and @Nvidia just became real. China-based @Bitmain on Tuesday revealed its specialized digital currency mining system for ethereum, which analysts have predicted could hurt demand for graphics cards.

"We are pleased to announce the Antminer E3, world's most powerful and efficient EtHash ASIC miner. Ordering limit of one miner per user and not available in China. Limited stock, order here now," Bitmain tweeted on social media Tuesday.

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