Intel QX9650 doesn't like sub-zero temperatures
 

HKEPC is reporting that the Intel Core 2 Extreme QX9650 CPU is having some problems handling sub-zero temperatures, something that won't be an issue for most of us, but it's a real downer for overclockers around the world.

Apparently the CPU won't boot if it's colder than -10 degree C and it will shut down if it hits -88 degrees C. If you're playing with liquid nitrogen, this is definitely going to be a major issue and even people with cascade coolers will have problems.
http://www.fudzilla.com/index.php?op...97&Ite mid=35