There were four basic materials that the Egyptians used to build the pyramids: limestone, pink granite, basalt, and alabaster. Each type of material had a diverse use. Limestone had, for the most part, two uses.
To answer your question: The useful lifespan of a CPU is about 3-4 years. My guess on the technical lifespan under full load is closer to 8-10 years if nothing else breaks and takes the CPU with it. The reasons: High Performance Computing Clusters usually keep the computers for 3-4 years.
submitted 2 years ago by The_Trekspert. I got my laptop (HP Pavilion dv6 - Windows Vista) Summer 2009. Once 7 came up, I upgraded to that. I was just wondering what the average lifespan of a laptop is, so I know if I should stay relaxed and not worry, or start to panic that my laptop is gonna day any day now. 3-4 years for hardware to become outdated to the point you should identify it as a low end system. But it all comes down to use and the users skill.