An “air-flow” inspection might sound like a made up term to allow for extra time on a service visit, but it’s something that should be done at least twice a year. The following picture is of a Quad-Core G5’s processor. Sadly, this one clogged up with dust and baked the processor and caused it to fail. In this case it worked out to be about $1500 worth of repairs. The Quad-Core G5’s seem to have a more tightly packed radiator then some of the other models, so that gives dust a better foot hold to build up. With the “open” fan system in G5’s and Mac Pro’s it’s important to take a look inside from time to time, to ensure you don’t have a dust build up.

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Also don’t forget that Macintosh computers sitting on the floor are closer to the dust then units up on the desk.