I was planning on using my old computer that I have at home thats never used because I'm away at University all year. Its a pentium D 2.6 Ghz processor and a pretty old ATI GPU. Electricity costs don't matter to me because I live in an apartment and we have free electricity.

SInce the computer is used literally for nothing, I was thinking of using 100% of its processing power to mine. Would it be possible to mine 2 separate types of coins at once?