The Intel Core Ultra 9 285KF is the objective winner of this comparison, securing victory in eleven out of sixteen measured specifications. Its most significant technical advantage over the Intel Core i5-12600K is its L2 cache, which is 321% larger. While the Intel Core i5-12600K remains competitive in a few areas, the Intel Core Ultra 9 285KF demonstrates a clear superiority across the majority of the evaluated hardware metrics.

Users prioritizing raw technical specifications and the substantial cache capacity should select the Intel Core Ultra 9 285KF for their build. Conversely, those who are strictly focused on the initial cost of their hardware should choose the Intel Core i5-12600K, as it holds a 51% advantage in MSRP. Your final decision should depend on whether you value the expanded cache performance of the newer model or the lower entry cost of the older processor.