what is the difference between i3 vs i5 vs i7?
Core i5 and i7 CPUs have 4 cores, while i3 CPUs only have 2. Core i5 CPUs lack Hyperthreading. Core i7 CPUs have more Smart Cache than i5 CPUs, which in turn have more cache than i3 CPUs. Core i5 and i7 CPUs have the same graphics, although the speed of that graphics will depend on the individual CPU.