The Intel Core Ultra 5 245KF is the objective winner of this comparison, securing victory in ten out of sixteen measured specifications. Its most significant technical advantage is its L2 cache, which is 247% larger than that of the Intel Core i5-12400F. While the latter component maintains a lead in power efficiency, the superior cache capacity of the Ultra 5 245KF represents the most impactful performance-oriented improvement between these two processors.

Users prioritizing raw technical specifications and memory-intensive operations should select the Intel Core Ultra 5 245KF for its substantial cache advantage. Conversely, the Intel Core i5-12400F is the better choice for those who prioritize power efficiency, as it offers a 48% advantage in TDP. Choosing between these two depends entirely on whether your primary requirement is the increased cache capacity of the newer model or the lower power consumption profile of the older unit.