If you haven't done it in a while, opening your PC case can be like a slasher flick -- you know you'll see something disgusting, but you're never sure what. Taiwan's YoungYear Electronics claims to stop the horror with its Green Mesh case, which has neither fans to suck dust, nor filters, and keeps your components cool with a "chimney effect" instead. It's this same action that repels dust out the top, so that only one quarter the usual amount of filth is drawn in -- according to the company. The only downside is that with poor heat dissipation, the maximum power supply unit size is 300 watts -- which probably scratches it off the list for most modders or power-users. For the rest, if you don't mind your computer's innards blowing in the breeze, at least you'd have no nasty case-opening frights.