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.
Besides old phones, eCycle Best also makes great deals for used laptops. The lifespan of a consumer or a business laptop is between three and five years. If your laptop is beyond its projected lifespan or costing you for maintenance, trade it in for quick cash at eCycle Best.esides old phones, eCycle Best also makes great deals for used laptops. The lifespan of a consumer or a business laptop is between three and five years. If your laptop is beyond its projected lifespan or costing you for maintenance, trade it in for quick cash at eCycle Best.