You really can't. http://www.bitcoinx.com/profit/ http://www.bitcoinx.com/profit/ At the next difficulty estimate, an i7 with free electricity mining all the

You really can't. http://www.bitcoinx.com/profit/ http://www.bitcoinx.com/profit/ At the next difficulty estimate, an i7 with free electricity mining all the time at 8 MH/s would make about 9 US cents in a month. Since the difficulty will probably go up again in less than two weeks, make that less than 2 US cents per week. Since very few people actually have free electricity it's not worth it. http://eviltechmonkey.com/btc.html http://eviltechmonkey.com/btc.html