The era of gigahertz is long gone as now we look at other specs to know if a processor is good enough for what we need it. AMD broke the gigahertz balloon when it created processors with names like Athlon 2000+, meaning that it could do the work of a 2GHz Intel processor with a 1.7GHz processor, for example.
So, what do i3, i5 and i7 mean and what do they do? i3 has two cores, hyperthreading for multitasking, smaller cache, consumes less power than i5, the i5 has 2 cores on laptops and 4 on desktop, better onboard graphics and turboboost, the i7 can have 2-8 cores, hyperthreading, supports 2-8 sticks of memory, they have more cache, faster turboboost and better onboard graphics.
Now you know.
(I’ll stick to AMS Fx processors, in any case 😀 )