This is when the guys with free electricity like me smile.
History will unfold good returns on me.
Really? how many free electricity do you have? If you can only house 1 S4 then whats the point..
well if 1 s4 = 1 kwatt and he has 10 kwatts to spare in a soon to be fall northern hemisphere location. his cost may be under 200 bucks for the next 6 months.
20th will mine 45 btc at 10 % diff
20th will mine 24 btc at 20% diff
now this means 10 units at 2.4 coins would certain make money for him
10 units at 3 coins each would most likely make money for him
and 10 units at 4 coins each may turn a profit