Comparison! Antminer S9 Vs 6 GPU Rig

Cost to mine 1 BTC Comparison between Antminer S9 & 6 GPU Rig (Sapphire Pulse Rx580 8 GB)

47 Antminer S9 will make 1 BTC in 1 month.
1 S9 Consumes 1.3 KWH means 1.3 unit per hour so 1.3 x 47 = 61.1 Unit per hour
47 S9 Machines will consume 61.1 x 24 = 1466 units per day
47 S9 Machines will consume 1466 x 30 = 43980 Units in one Month.
Means 43980 Units required to mine 1 BTC in one Month Using 47 Antminers.

Now coming down to GPU Rig.
30 GPU rigs of 190 MHS will make 13 ETH in one Month
13 ETH = 1 BTC
1 GPU rig consumes 850w means 0.850 kWh or 0.850 units per hour.
30 GPU rigs will consume 0.850 x 30= 25.5 Units per hour
30 GPU rigs will consume 25.5 x 24 = 612 Units per day
30 GPU rigs will consume 612 x 30 = 18360 Units per month, means it will take less than half electricity to mine 1 BTC on GPU Rigs than Antminer S9