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.
Ablestock.com/AbleStock.com/Getty Images. Tech experts generally agree a computer should last anywhere between three to five years before needing to be replaced. Of course, this number is just a generalization and a number of factors play into lifespan, ranging from the computer's quality, care and room for upgrades.blestock.com/AbleStock.com/Getty Images. Tech experts generally agree a computer should last anywhere between three to five years before needing to be replaced. Of course, this number is just a generalization and a number of factors play into lifespan, ranging from the computer's quality, care and room for upgrades.