Quote from: mrb on September 17, 2011, 04:04:31 AM

Quote from: Syke on September 16, 2011, 08:21:41 AM

Where do you live, Hawaii? Break-even is around $.20/kwh on a decent rig. The days of running a farm with electricity rates that high are over. Liquidate your hardware now.

Tawsix said below he pays $.15/kWh during the day and $.08/kWh during the night. My guess is that he made the mistake of building a farm mostly from 5830s which have terrible power efficiency. At $.15/kWh his cost of production on a 5830 is about $5.9/BTC, clearly losing money when the exchange rate is $4.8/BTC.

My 4x5830 rig draws 650 watts and outputs 1112 mhps which generates .64 btc and draws 15.6 kwh.
.15 for 9 hours and .08 for 15 hours is about .11 per kwh average per day.
Cost to generate btc is $2.59 per coin.

Sounds like his efficiency is half of what it should be.