Originally Posted by Light
I've only needed to clean my system once a year, and the dust level isn't half as bad as cluttered systems which are a complete bitch to clean. Doesn't hurt to buy cheap fan filters either.
I always keep my PC well ventilated and compared to my old PC it collects a lot less dust. It's so less dust it's too dangerous to clean it too much I think. I don't know much about the PC stuff but my new PC does have a fan on the side of its case...