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.
No Longer a Noob Joined: Dec 16, 2008. Messages: 7,266. Date Posted: Mar 21, 2013 #1. Advertisement. My last laptop was a gift that I received to begin my freshman year of college. It lasted until the middle of my first year of graduate school before it suddenly died. So it lasted 4.5 years. It was becoming slower and slower over the years and it never had more than middle of the road specs since purchase day. Back in 2008 it had 2gigs of RAM and 250gigs of memory. Gateway computer with a Turion 64 processor lol.