If there are difficulties with the choice of a CPU, you will solve them by looking at comprehensive benchmark Intel Core i3-8121U Cinebench r20 score single and multi core and understand is it a good processor or a bad one to buy, how powerful is this CPU. Here is useful information from Cinebench r20 benchmark. A step-by-step analysis of all the specifications, so that it can be easier to understand, is presented in the form of the table. After reading the results this test and video, you already be able to understand do you need to buy Intel Core i3-8121U or not.
However, it should be understood that all the figures in the table above do not mean that taking them into account you should fully trust a simple comparison of these figures. Better to watch the video tests and read the reviews of of people who bought Intel Core i3-8121U before deciding buy this CPU or not.