So my calc is inly in 50% other 50% need to be added... nyway still mining the one coin drk will cost 250$ so I am calm.
Some write that it`s not profitable but persistent ones will win. With my 4x 280x + i5 I get 0,0189 BTC/day - electricity.... so get more that any other scrypt coin mining.... who knows how long it lasts....
mow much do you pay per kwh
Prezzo dell'Energia - F1 €/kWh 0,117500
Prezzo dell'Energia - F2 €/kWh 0,041500
Prezzo dell'Energia - F3 €/kWh 0,041500
So I have 4 gpu 280x every conumes about 200watt/h = 4*200watt = 0,8 kWh (assuming just on my eye looking at counter don`t have a killawatt) If 280x takes less than 200 watt for hour...the proifitability will rise
I get 9000 Mhash/s with them.
60hours a week pay 0,1175 euro/kWh = 7,05 euro
60hours a week pay 0,0415 euro/kWh = 2,49 euro
and 2 days of weekend = 48 hours pay 0,0415 euro/kWh = 1,5936
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After 1 WEEK of 7/24 mining it costs me 11,13 euro + VAT (10%)
After 1 MONTH of 7/24 mining it costs me 47,71 euro + VAT (10%)
1 month costs of electricity is 52,48 euro
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I get ~7,5 drk/day nowadays...today almost doubled coins with this low diff....
7,5 coin * ~0,0013BTC/coin = 0,00975BTC/day * 30 days = 0,2925BTC * 370 euro = 108,22 euro profit - 52,48 euro costs of electricity = 55,74 euro clear profit @ 4x 280x gpu
EDIT: sorry I did wrong calculations with weekly hours - too much mathetmatics
It seems you didn't receive the first electricity bill yet...
The price u put for F1, ,F2, F3 r pure prices for electricity... u forgot dispatchment, fees and lot of other imposts u should know we r used to have here in Italy...
If u have a good electricity tariff u can hope in an optimistic 0.25/0.30 euro/kwh...
So it's better to remake ur counts or u'll have bad surprises...
Not last, remember in Italy the price per kwh rises with consumption... Using 6000 kwh/year u pay double price per kwh than using 3000 kwh/year...
With 4x7950 undervolted i have 850 at wall... w your rigs (4x280x + i5 cpu) u'll be approx 900/1000w... It means for 24/7 u r approx 8500/9000 kwh/year (just for the rig... + all the rest u have at home!)
I'm not saying not to mine, but make your right counts... I'm doing it... and not for daily profit but 'cause i believe and trust the potential of some alt coins!
Happy mining!