I am interested in building a budget rig, but am not at all sure where to start. I will probably just start with LTC since there is less competition there, but I still need to know the bascis and how to get the most hash for my buck. It is also important to know that I have to have a case, and I am worried about temps.

Anyways, I assume I will want to just install Ubuntu. So, what CPU should I go for? How much RAM should I have? Can I use different cards on the same system? Im doing research and looking things up as well, but thought I should at least start a topic and hopefully get some advice from those who have been there, and done that.