The Intel Core i5-12400 is the objective winner of this comparison, securing victory in seven of the fourteen evaluated categories. Its most significant technical advantage over the Intel Core i5-10400F is its L2 cache, which is 400% larger. While the Intel Core i5-10400F maintains a lead in MSRP, offering an 18% advantage in that specific metric, the superior cache capacity of the newer model provides a more substantial improvement across the majority of the measured specifications.

Users prioritizing the most advanced technical architecture and cache performance should choose the Intel Core i5-12400 for their build. Conversely, the Intel Core i5-10400F remains the appropriate selection for budget-conscious buyers who place a higher priority on the 18% MSRP advantage. By weighing the significant cache increase of the newer processor against the cost savings of the older model, users can align their purchase with their specific financial or performance requirements.