What exactly do you mean by reasonable? From my knowledge, most of the time, it won't even have to be connected to the internet. It is just using the idle cpu clock cycles to fold proteins and stuff. The most I know is that download at the maximum is 4MB and Upload is about the same... I think. That isn't a lot of bandwidth even for a modem (I use a modem), perhaps you should look around the website for more answers... overall, it's worth it completely...