Normally, when we bring you computer case mods, the PC resides inside some other object, from dead animals to retro hi-fis. The quite awesomely named Dr. Sai Bhaskar Reddy Nakka breaks away from such tired and conventional thinking, instead ripping the guts out of a PC case and putting fire inside.
The Smoke Burner Stove has four chambers, which can be used either successively or simultaneously. The original power supply is used to drive two of the original fans to force air over the fuel. This results in five to ten times more efficiency than just setting fire to something. To wit: It is overclocked, and could be the hottest-running PC we've ever seen.
Project page [Smoke Burner Stove via Make]