There's a post on Facebook that has a lot of good information on a Dual Core setup. I wish could post a link of just that one post. If you're on Facebook, and curious to find it. Go to this:

https://www.facebook.com/groups/2207224160/

Scroll all the way down for quite awhile until March 23 @ 10:55pm. Post by Chris Hinson.

That post will most likely answer a lot of your questions.