New member here with years of computer use, but definitely a rookie when it comes to technical stuff. I'm looking for basic info on processors, such as their role in how they affect the computer's operation, how and the difference between the AMD and Intel processors. It also seems to me that any given computer model has their processors updated at least once during the course of their retail shelf life.
As an example, I'm looking at a Lenovo Ideapad 320 15" laptop, available with these processors:
AMD A9-9420 dual-core processor, 2.90GHz, Max Turbo Speed of 3.50 GHz $279
Intel Pentium N4200 processor, 1.10GHz 2MB $299
7th generation Intel Core i3-7100U processor, 2.40GHz 3MB $449
My understanding is that a higher GHz output means better speed, right? So at first glance, the AMD is quicker than the Intel N4200...but what is the significance of the N4200's 2MB vs none for the AMD? And what makes the i3-7100U worth paying over $200 more than the other two models?
As someone who uses a laptop for pretty basic home use, I'm looking for answers focusing on the practical as opposed to technical. So if you'd answer as if you were talking to a 7th grader - and I mean a 7th grader from the late 1980s! - I'd appreciate any and all input.