The Intel Core i5-12600KF is the objective winner of this comparison, securing victory in nine out of fourteen evaluated specifications. Its most significant advantage is a 533% larger L2 cache compared to the Intel Core i5-10400F. While the Intel Core i5-10400F maintains a 48% advantage in TDP, the superior cache capacity of the Intel Core i5-12600KF makes it the more capable component across the majority of the measured technical categories.

Users prioritizing high-end technical specifications and the substantial cache advantage should select the Intel Core i5-12600KF for their build. Conversely, the Intel Core i5-10400F is the appropriate choice for those who specifically require the efficiency benefits provided by its 48% better TDP rating. Choosing between these two processors depends entirely on whether your primary requirement is the increased cache capacity of the newer model or the power profile of the older unit.