Give your PC case some automated cooling flaps
 

[SXRguyinMA] built a replacement top bezel for his computer case. He wanted to add vents that would automatically open or close based on the cooling needs of the computer. With some careful measurements he modeled the parts in Sketchup and sent out for them to be cut from styrene with a water jet cutter.


http://hackaday.com/2010/10/10/add-o...flaps-to-a-pc/