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 over the AMD Ryzen 7 3800X is its L2 cache capacity, which is 138% larger. While the AMD Ryzen 7 3800X maintains a notable lead in L3 cache size, offering a 60% advantage in that specific category, it ultimately falls behind in the total number of winning metrics.

Users prioritizing the superior L2 cache capacity of the Intel Core i5-14400 should select it for their build to benefit from its broader range of spec advantages. Conversely, the AMD Ryzen 7 3800X remains the appropriate choice for users whose specific computing requirements rely heavily on the 60% larger L3 cache provided by that processor. Each component offers a distinct architectural strength that dictates its suitability depending on which cache hierarchy is more critical for your intended tasks.