If there are difficulties with the choice of a CPU, you will solve them by looking at comprehensive benchmark AMD Ryzen 9 7900 Cinebench r20 score multi and single core and decide is it a good processor or a bad one to buy, how powerful is this CPU. Here you can find all information from Cinebench r20 benchmark. A thorough review of all the specifications, so that it can be easier to read, is made by the table. After reading the results of joint test and video, you already be able to know do you need to buy AMD Ryzen 9 7900 or not.
Although it should be realized that the summary data in the text above do not mean that taking them into account you should undividedly trust a simple comparison of these numbers. Be sure to watch benchmarks video and read the reviews of real owners of AMD Ryzen 9 7900 before deciding buy this processor or not.