There are ways you can do it with just a pc but it takes forever I have 12 gpu's and it still takes a Month to get close to 1 bc a pc you might make 20 cents a day but that is still something in bc
I am sure you can do something with it the are small sites you can try but run your stuff at about 60% I would think to be ok try this https://freebitco.in/?op=home# I run this also on 3 pc and 4 phones it gets some it is how I got started and then hooked