The AMD Ryzen 9 5900X is the objective winner of this comparison, securing a lead across seven measured specifications. Its most significant advantage over the competition is its L3 cache, which provides a 78% improvement in capacity. While the Intel Core i9-14900KS holds its own in six categories and offers a substantial 433% advantage in L2 cache size, the overall spec-win count favors the AMD Ryzen 9 5900X as the more balanced choice.

Users prioritizing the superior L3 cache capacity of the AMD Ryzen 9 5900X should select it for tasks that benefit from that specific architectural advantage. Conversely, those who require the massive L2 cache density provided by the Intel Core i9-14900KS should opt for that processor instead. Your final decision should depend on whether your specific workload relies more heavily on the L3 cache efficiency of the former or the L2 cache volume of the latter.