The Intel Core Ultra 7 270K Plus is the objective winner of this comparison, securing victory in ten out of fourteen measured specifications. Its most significant technical advantage is its L2 Cache, which is 2567% larger than that of the Intel Core i5-9400F. This massive disparity in cache capacity represents the most impactful difference between the two processors, providing the newer model with a substantial architectural lead across the majority of the evaluated categories.

Users prioritizing raw cache capacity and superior overall specifications should choose the Intel Core Ultra 7 270K Plus for their build. Conversely, the Intel Core i5-9400F remains a viable option for those specifically seeking a lower Max Turbo Power, where it maintains a 74% advantage over the newer processor. Selecting between these two components depends on whether your primary requirement is the expansive cache of the Ultra 7 or the power efficiency profile of the i5.