The Intel Core i7-13700K is the objective winner of this comparison, securing victory in ten out of fourteen measured specifications. While the Intel Core i5-8400 holds a notable advantage in Max Turbo Power, which is 74% better than its counterpart, the Intel Core i7-13700K dominates in memory architecture. Its most significant technical lead is found in the L2 Cache, where it provides a 1500% improvement over the Intel Core i5-8400.

Users prioritizing power efficiency should consider the Intel Core i5-8400, as it maintains a substantial lead in Max Turbo Power. Conversely, the Intel Core i7-13700K is the superior choice for users who require high-performance computing capabilities, specifically benefiting from the massive L2 Cache advantage. By selecting the Intel Core i7-13700K, users gain access to a more robust technical foundation across the majority of the evaluated specifications compared to the Intel Core i5-8400.