prometia mach 2

i was just wondering...not getting one, but people say it can get you cpu temp to -C. if you leave you cpu like that would it be too cold?i know no one is gonna leave it liek that with a mach 2....but would it be too cold and end up hurting the cpu.

 

Even colder would be fine. Its not the cold its the problems with dealing with the condensation that heat exchangers create such as peltier elements. But you can get kits like the one you suggest that come with an insulated package that help to eliminate the moisture that could blow the mobo components.