Perhaps you can't decide which processor to buy, you can make a choice after reading the comprehensive benchmark Intel Core i5-8400T GeekBench 5 score multi and single core and understand how powerful is this CPU, is it a good CPU or a bad one to buy. Here is all information from GeekBench 5 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 of parallel test and video, you already be able to know do you need to buy Intel Core i5-8400T or not.
All the data that you have looked at here do not mean that you should be guided entirely by them and trust a simple comparison of these figures. Better to watch the testing video and read the opinion of real owners of Intel Core i5-8400T before making a selection buy this CPU or not.