The AMD Ryzen 9 9900X is the objective winner of this comparison, securing victory in seven of the fourteen evaluated categories. Its most significant technical advantage is the L3 cache, which is 113% larger than that of the Intel Core Ultra 7 265KF. This substantial lead in cache capacity positions the AMD Ryzen 9 9900X as the superior choice for tasks that rely heavily on high-speed memory access to maintain efficient processing throughput.

Users prioritizing the specific benefits of the AMD Ryzen 9 9900X should select it for its superior L3 cache capacity. Conversely, those who find the Intel Core Ultra 7 265KF more suitable should opt for it based on its primary advantage, which is an L2 cache that is 200% larger than the competitor. Choosing between these two processors depends entirely on whether your specific workload demands the increased L3 cache of the former or the expanded L2 cache of the latter.