Sorry to hijack, but assuming I don't have to pay for electricity, is it more efficient to mine bitcoins or litecoins with a Radeon Mobility HD 5870?
From what I hear, mining with a laptop will burn it out really fast due to lack of airflow on heavy duty work. Best setting up a desktop rig with decent cooling and airflow.
I'm just doing it on the side mainly. Keeping it on in the night hours for a buck a day, so hopefully I won't burn anything out too quick. Thanks for the advice though.