How to keep your PC cool with dry ice

“For overclocking only, pure and simple. It is not usable for daily 24/7 cooling, it’s mostly used by those people who like to push their PC to a higher speed. By using subzero cooling you can obtain impressive overclocks. Dry Ice will provide you better performance then air- and water-cooling, as well as single stage phase change cooling setups.

Due to its low cost and lower risk then LN2 it can be used easily in a wide variety of environments, cascaded phase change setups are more expensive and require a higher technical barrier as they are not available off-the-shelve.”

If you want max performance, this is definitely a hardcore project. Check out all the info at Mad Shrimps.