Not sure about the question.
You need a CPU heatsink for sure. There are passive coolers for that.
As for case fans, you can try running the board in an open case, if the room temperature is not too high and the case is not in a closed space.
Or run the board outside the case. and check temperatures.
OK, question was kinda vague. What I mean is either a case that is sloped so that the cpu heat sink is exposed but the rest of the components are enclosed in the case or an extra large heat sink that protrudes out of a standard size case. Running without/outside of the case works for this but means that all the components are exposed and succeptable to dust and damage from the environment. I will try to photoshop an example of what im thinking of and post here.