I heard a rumor there would be a Bitfury 2 chip end of Feb. 
At 1W per chip the current generation outperforms Antminer with half the power, it's the same as KnC Miner who "only" promised 30% less W/H in their 20 nm design... when their 28 nm is about the same as BitFury.
Do we have a CoinTerra/Bitmine killer?
