It is true that Intel and AMD have supported this functionality for a while now, and vendors like HP provide direct control to processor throttling settings via their Lights Out Management interfaces. HP's power capping works essentially in this manner.
Furthermore, new servers and supercomputing clusters and being built with components tested to higher thermal constraints. For most new servers, vendors will warranty the server up to 95F inlet temperature, and SGI/Rackable provide servers with up to 104F thermal certifications. The telco industry has required 104F for years, which is why you rarely hear about telephone circuits going down due to heat waves... It is time for the data center to catch up to the state of the art from 20 years ago in the telco market!
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