just to clear shizhit up here, at absolute zero, the atom on a electron's orbit colapses to the core. Fermilab, in Illinois, an instituion that's splitting atoms right now give their best to bring the temp of the pipeline through which they run the electron cloud as low as possible. I know the guy that conducts the tests, and the reason they get w/in a degree of absolute zero is to improve electrical flow. now i don't know if at absolute zero current would still run through it, even though i believe it would, but i know that at a temperature way above absolute zero **** could shatter on yer motherboard. not only due to vibration from the harddrive, case fans, and all the other ****, but the connections would expand in the processor and would eventually either explode if at the outside (the pins would pop off), or imploade close to the ends. probably both. Also, if you wuold get to ab zero, or close to it, you'd need EXTREMLY rare metals to run the electrical current through it, w/ no impurities and oriented the right way. so all the bull**** about light speed and crap, forget it.
Nobody has ever reached ab zero yet. we dont even know exactly wat would happen when we did.
now to answer the question, as long as you don't see frost building up in yer case, it's all good. however, do contact your processor manufacturer before you **** around w/ it