Let's say there are difficulties with the choice of a processor, you will solve them by seeing the full benchmark Intel Core i5-8400H Cinebench r15 score single and multi core and decide how powerful is this processor, is it a good CPU or a bad one to buy. Here is all information from Cinebench r15 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 looking at the data this test and video, you already be able to figure out do you need to buy Intel Core i5-8400H or not.
All the data in the article above do not mean that taking them into account you should totally trust a simple quantitative comparison. Better to watch benchmarks video and read the opinion of real owners of Intel Core i5-8400H before making a decision buy this CPU or not.