Now I have a question for you. Someone tolled me that if I overclock my cards I need to increase the voltage. Even if that is not necessary for stability. You just need to or you will damaged it. Is that right? It sounds wrong to me but I'm no expert...
If you are stable, then there is no need to increase voltage. (You might have some issues that don't cause the card to stop working completely that require more voltage however.)
It will definitely not ever do damage to run at too low voltage. Running at too high of a voltage is where you might do physical damage to your cards.
he beat me too it, I agree. The best thing to do is to use the software that came with your card to over clock it. If it didn't come with software you are better off not overclocking it. Playing with voltage can seriously fry your system if you dont know what you are doing with it.
To pay for a BL 5gh miner will take around a month if the market price goes down to 100, 3 months if it goes under 75, those are just estimates so please no one correct me. Fact is no one should invest in bitcoins at all unless they can afford to loose every penny they put into it because it is marginally stable at best. People will always do currency conversions regardless of how much of a market there is. There is a movement to use silver as a unit of trade and people still convert silver to fiat.