There are exceptions to every rule (though that wasn't a rule). I simply posted they would be 'out of their mind' to do so in an enterprise environment. You have to think of, for a large data center, how to dissipate the extra heat, pay for the power consumption, and how do you justify the performance increases versus the additional cost to support the overclocked CPU's. What if one is not really stable and bombs applications they run on? What if one in 100 are? They would mean 3 of our servers wouldn't make our uptime SLA's (smallest shop I work in now). I have worked at some fairly large places (Abbott Labs - they make Similac, Ensure, Pedialyte and Pharmaceutical drugs, as well as a 8th largest water utility in the US) so perhaps that is how my opinion is molded.