For example you can't decide which CPU to buy, you can make a decision by looking at the Intel Pentium 6405U Cinebench r15 score multi and single core test and decide is it a good processor or a bad one to buy, how powerful is this CPU. Here is all information from Cinebench r15 benchmark. A thorough review of all the specifications, to make it easier to read, is summarized in the table. After looking at the data this test and video, you already be able to understand do you need to buy Intel Pentium 6405U or not.
Although it should be understood that all the data that you have looked at here do not mean that taking them into account you should fully trust a simple quantitative comparison. Better to watch the video tests and read the reviews of real owners of Intel Pentium 6405U before making a selection buy this processor or not.