If you have difficulties with the choice of a processor, you will solve them by seeing the detailed test Intel Core i9-12900K GeekBench 5 score single and multi core and decide how powerful is this processor, is it a good processor or a bad one to buy. Here is all information from GeekBench 5 benchmark. A thorough review of all the specifications, so that it can be easier to read, is summarized in 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 i9-12900K or not.
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 opinion of real owners of Intel Core i9-12900K before deciding buy this processor or not.