The Intel Core i5-14400 is the objective winner of this comparison, securing a lead in seven out of fourteen measured specifications. Its most significant technical advantage is its L2 cache capacity, which is 138% larger than that of the AMD Ryzen 7 3800X. While the latter remains competitive in specific areas, the Intel Core i5-14400 demonstrates a broader range of superior hardware specifications across the evaluated fields.

Choose the Intel Core i5-14400 if your priority is the substantial advantage in L2 cache capacity provided by the newer architecture. Conversely, the AMD Ryzen 7 3800X is the appropriate selection for users who specifically require the 60% larger L3 cache offered by that processor. Your decision should rely on whether your workload benefits more from the increased L2 cache of the Intel chip or the superior L3 cache found in the AMD alternative.