GekkoScience Compac USB Stick Bitcoin Miner 8gh/s+ (BM1384)

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The most efficient USB miner ever manufactured is available in limited quantities! The Compac features 2 Bitmain BM1384 chips (same chip in S5) and a fully adjustable regulator design that gives you a core voltage range of 550mV to 800mV. Typical hasrate is 15+gh/s depending on clock rate. Efficiency is .31-.35 watts per gh.