Quote from: evakka on January 20, 2017, 10:34:44 PM

Quote from: leowonderful on January 20, 2017, 12:29:35 PM

Quote from: evakka on January 20, 2017, 09:56:36 AM

If he is having the advantage of free electricity the option to buy a used antminer s7 and go for Bitcoin is it going to be profitable nowadays ?
How much does this device cost and when do u think he will be able to get his money back and make profit on top of that?

Honestly i'd just go for a bunch of used S5s, they cost less if you're going to use free electricity and you should reach ROI in just a few months and profit after that. You could also go all out with the most obsolete, high-hashrate miners like the S2 but i'm guessing OP has a cap on his electrical usage.

S2 is having better results than the S5 but it consumes more power?
What does OP mean ?

Use S5 at least.