The AMD Ryzen 9 3900X is the objective winner of this comparison, securing victory in seven of the fourteen evaluated specifications. Its most significant technical advantage is its L3 cache, which outperforms the Intel Core i5-14600K by 167 percent. This substantial lead in L3 cache capacity serves as the primary differentiator between the two processors, establishing the Ryzen 9 3900X as the superior choice based on the total number of winning specifications.

Users prioritizing the massive L3 cache advantage should select the AMD Ryzen 9 3900X for their build. Conversely, those who require the specific benefits of a larger L2 cache should opt for the Intel Core i5-14600K, which holds a 233 percent advantage in that category. Choosing between these two components depends entirely on whether your specific workload relies more heavily on the superior L3 cache of the Ryzen or the significantly larger L2 cache of the Intel.