Last 6 x Antminer S7
Given the current difficulty and block reward, what price would electricity need to be to make these profitable to run? Never mind external costs like rent/rack space, A/C, etc?
S7 is still profitable for me. But 80% of their earnings goes to electricity.
1THs = 0.001178345 BTC
200Ths = 0.235669 BTC with PPS payment -2.5% 0.229777 BTC
I turned off today my last 6x S7 miners. The only way is currently mining with S9, if you must pay for electricity.
But to get with 200THs S9 miners 0.23 BTC day, I spend over 500 kWh in 24 hours, my profit from BTC mining with only S9 miners is less than 100 euro in day.
I got more with TITAN-s.