After difficulty increase asic come for bitcoin mining.A speacial part for btc mining.All know bitmain is best for mining.

Day by day difficulty increasing rapidly.Next year in may it will come 6.5 rate .

Remain this topics miner company create new,powerful miners.

Bitmain
Antminer S17 Pro (53Th)(SHA256)

Profitability:

S17 Pro - Normal mode, Low power and Turbo also available. * Requires 2 Power cables per unit

Efficiency ~.0395 J/GH              Hashrate = 53 TH/S               Power Consumption = 2094 W                  Cost/TH = 38.39 USD                 Requires AB enabled pool = No               

Cost before shipping/taxes/import fees = 2035 USD  

Income day $24.97 (0.0021 BTC)

Income month $749.09 (0.0652 BTC)

Income year $8,989.09 (0.7824 BTC)

Now s17 pro is the best miner.IF one thinking about start mining this miner is best. 

BUY : http://coinminingcentral.com/collections/s17/products/bitmain-antminer-s17-pro-53-th-s?rfsn=1704384.5cfb1b