A few days ago Bitmain introduced an X11 miner, Antminer D3 with 15 GHS. (more details: https://steemit.com/cryptocurrency/@swapnil2233/new-bitmain-antminer-d3-asic-offering-15-ghs-x11-hashrate)
Of course people are crazy excited about it. But for folks who want more here is A5 DashMaster with whoping 30.2GH at just 750W power consumption. And you can overclock it to get 38 GHS at 1250W. Here are few specifications and details:
Wish I had enough capital to invest in this miner!
(Source & images: INNOSILICON official website)