I found this on a electronic kits site and thought it might be a good way to cool down a computer thats running hot. http://www.electronickits.com/kit/complete/peltier/ck500.htm It seems like it would be perfect to mount in a computer, just hook it up to the powersuppy or an outside source. And to keep it from making the computer a freezer, you can probably put a voltage regulator(something like that) and turn the power down so it don't blow to much cold air. The only thing Iam not sure of is even though it don't use water, it might produce moister. I might buy one and try it out in a junk computer before i mount it in my good one.. Also this would be a good way to cool yourself down.