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.
Although the laptop itself can last five years or more, the battery's life typically runs a bit shorter. As batteries age, their ability to hold a charge is compromised. The lifespan of a laptop battery varies depending on how it's used, but averages between 18 and 24 months.As it reaches the end of the line, you'll have less and less time available on a full charge.s a machine, however, it won't last forever and you'll eventually need to replace it. Although each individual laptop's actual lifespan varies, on average a laptop will typically give you between three and five years of use.