The Intel Core i9-12900K is the objective winner of this comparison, securing victory across eight of the fourteen evaluated specifications. Its most significant technical advantage is the L2 cache, which is 367% larger than that of the alternative. While the Intel Core i5-11400F holds its own in three specific areas, it cannot match the superior cache capacity provided by the higher-tier model, which serves as the primary differentiator between these two processors.

Users prioritizing maximum hardware specifications and the substantial L2 cache advantage should select the Intel Core i9-12900K for their build. Conversely, the Intel Core i5-11400F is the logical choice for buyers who prioritize the 73% better MSRP as their primary decision factor. By weighing the cache capacity against the cost-related benefits, you can determine which component aligns best with your specific requirements for a new system.