The Intel Core i9-14900 is the objective winner of this comparison, securing victory in nine out of fourteen measured specifications. Its most impactful advantage over the Intel Core i5-10400F is its L2 cache, which is 2033% larger. While the older processor holds its own in a few specific metrics, the newer model demonstrates a significant technical lead across the majority of the evaluated hardware categories.

Users prioritizing maximum technical specifications and cache capacity should select the Intel Core i9-14900 for their build. Conversely, the Intel Core i5-10400F remains the logical choice for budget-conscious buyers, as it offers a 71% advantage in MSRP. Choosing between these two components depends entirely on whether your primary requirement is the superior cache performance of the newer model or the cost efficiency provided by the older unit.