Well Rui jumped out of nowhere and said everything I would say in a whole page summed up in 2 lines...
![Embarrassed Embarrassed](https://ptcbox.me/forum/yabbfiles/Templates/Forum/default/embarassed.gif)
Ok, we have also discussed this subject
here before.
In my place they say that "an image is worth a thousand words" so.. since a video is worth 30.000 words/second, to break it down in a much easier way simply watch the embedded video in this page :
http://www.bitcoinmining.com/