this video shows a tutorial on setting up ur CPU to runn at way under freezing temp. how did they doo that Cooling With Compressor Video
That probably uses Phase Change / Peltier (sp?) cooling. It's an extreme way of cooling components (CPU's mainly).
It'd have to be phase change or liquid nitrogen. Peltier does a good job for sub-ambient temps, but it's not enough to get close to running subzero numbers.
here a Liquid Nitrogen cooling and the above post doesnt look anything like it. i wanna how i can try to do the above post Overclocking To 5Ghz Video
It is the Prometia 2 Phase Change. It is the exact same system that goes into a refridgerator or air conditioner. Unfortunately, they are mighty expensive.