Let's say you can't decide which processor to buy, you can make a decision by looking at the Intel Core i5-8600K Cinebench r20 score single and multi core test and decide how powerful is this processor, is it a good CPU or a bad one to buy. Here is all information from Cinebench r20 benchmark. A careful analysis of all the specifications, to make it easier to read, is made by the table. After looking at the data of parallel test and video, you can already make an informed decision about do you need to buy Intel Core i5-8600K or not.
However, it should be understood that all the figures that you have looked at here do not mean that taking them into account you should totally trust a simple comparison of these numbers. Better to watch the testing video and read the opinion of of people who bought Intel Core i5-8600K before making a selection buy this CPU or not.