[dice7]

The main thing a pc case + fans do is remove the hot air as fast as possible from your components and NOT bringing cold air inside so having one side of the case open helps. I don't know how some people manage to break their components and blame dust, the thing is that I've been without a side on my case for well over a year now and the last vacuum clean up I did was the day I took the side down and my computer is still up and running