Depends on what you want to accomplish with your build. Do you want an indash PC or a remote system mounted under a seat or in the trunk? Also what apps besides the frontend and associated apps (GPS, etc)are you going to use? You might not need that much processing power. I have a dual core atom and so far it has done everything I have thrown at it. Since I'm doing a complete in-dash install I went with a mini-itx (7"x7") board but if I was to do it over again I would probably pick one of the 3.5" boards with the DC atom.