Depends on needs and cpu. I kept my previous cpu (i7 2600k) for about 10 years but thats an anomaly due to anemic cpu performance progress during that time period and me also not doing anything seriously cpu intensive. 2600k had also very good oc gains and hyperthreading aldo carried compared to just 4c/4t cpus. Previously i owned pentium iii -> pentium 4 -> core duo E6750.
Depends on needs and cpu. I kept my previous cpu (i7 2600k) for about 10 years but thats an anomaly due to anemic cpu performance progress during that time period and me also not doing anything seriously cpu intensive. 2600k had also very good oc gains and hyperthreading aldo carried compared to just 4c/4t cpus. Previously i owned pentium iii -> pentium 4 -> core duo E6750.