cpubenchmark, userbenchmark... Anyway, do not pay much attention to what these and other websites tell you. they have many mistakes.
There is no magic formula for classifying a piece of hardware. An example I5-8400 and Ryzen 5 1600 processors which is better? It depends. Surely for games the I5-8400 and to render videos the Ryzen 5 1600.
If you want to make a computer with a big box, it is less important that a piece be heated because it has many coolers at your disposal. If you want to make a mini-itx without additional fans you need very fresh components. None of these generalist websites will tell you anything about this.
what to do? Consult reviews of trusted sites (tom's H, anandtech ...) and see the pros and cons of the...