which hardware is better ?

[sdgdfhfghf]

hi;

i want make big farm of btc mining and which hardware do you advice me ?

is good antminer s9 ?

 

[lottery248]

i don't know, but seems S9 is better because its efficiency. other than that, as long as the electricity is affordable and/or you have a solution to harvest the heat and use them in a regenerator.

[btctousd81]

indeed s9 is the currently best hardware with good $ to hash ratio , in the market, but you need good power supply unit.

good luck.