i agree with machine350's post, although i wanted to add one comment... if the side vents are right above the CPU fan, make sure that they are spinning in the SAME direction as the CPU fan. that is, if the CPU fan blows air away from the CPU, make the side vent an exhaust, and if the CPU fan blows air towards the CPU, make the side vent an intake. if they move air in opposite directions, in my experience, i've seen it create either a vaccuum effect or just really poor air flow.