The key to to the questioned posed is the wording. The key word here is "designed". What others do after it is designed is beyond the designers control. If it exceeds the design limitations of the part (CPU in this case) it will naturally have premature failure, but still fails to answer the question,

RaaF has come up with the best answer yet to maintaining the cpu and other equipment for that matter. As proper maintence will extend the life of particular parts and systems.

I'll be back tonight and post the answer if no one gets it.