Take one computer, drop it into an aquarium, fill with mineral oil and presto! -- a mineral oil cooled computer case. I decided to make one of my own and I've got to say it's pretty cool except for the fact that all my fish keep dying. What do they not like mineral oil or something? The man responsible for the mod had this to say: "after about 2 hours, the temperature settled at a new maximum of 84C on the CPU under load." That's pretty impressive, seeing how the temperature of my CPU settled at broken under heavy load. And by 'under heavy load' I mean I sat on it.
A video tutorial to make your own after the jump.
Mineral Oil Absorbs Heat, Cools Computer System [techeblog]