The Intel Core i9-14900 is the objective winner of this comparison, securing victory across seven distinct specifications compared to three for the Intel Core i5-12400. While both processors share four tied specifications, the most impactful advantage belongs to the Intel Core i9-14900, which offers a 327% larger L2 cache. This significant architectural lead positions it as the superior option for tasks requiring extensive high-speed data access and sustained processing power.

Users prioritizing budget efficiency should select the Intel Core i5-12400, as it holds a 65% advantage in MSRP over the alternative. Conversely, the Intel Core i9-14900 is the clear choice for power users who require the substantial L2 cache capacity to maximize performance. Choosing between these two components depends entirely on whether your primary goal is minimizing initial hardware costs or maximizing the technical specifications available for your computing workload.