The Intel Core Ultra 5 245KF is the objective winner of this comparison, securing victories in eleven out of fourteen measured specifications. Its most significant technical advantage is its L2 Cache, which is 1200% larger than that of the Intel Core i9-9900K. This substantial increase in cache capacity represents the primary performance differentiator between the two processors, establishing the newer model as the superior choice across the vast majority of the evaluated hardware metrics.

Users should select the Intel Core Ultra 5 245KF if they prioritize the massive L2 Cache advantage for modern computing tasks. Conversely, the Intel Core i9-9900K remains a viable option for specific use cases that benefit from its Max Turbo Power, which is 40% higher than that of its successor. Choosing between these components depends on whether your workflow relies more heavily on the expanded cache architecture or the specific power profile of the older unit.