The AMD Ryzen 7 7700X is the objective winner of this comparison, securing victories in ten out of fourteen measured specifications. Its most significant technical advantage is the L2 Cache, which is 433% larger than that of the Intel Core i5-8400. This substantial cache capacity provides the primary performance edge for the Ryzen 7 7700X, positioning it as the superior component across the majority of the evaluated hardware metrics.

Users prioritizing high-end processing capabilities should choose the AMD Ryzen 7 7700X to leverage its superior cache architecture. Conversely, the Intel Core i5-8400 is the appropriate selection for those who specifically require a lower Max Turbo Power, as it holds a 54% advantage in that category. Selecting between these two processors depends on whether your system requirements favor the extensive cache capacity of the Ryzen or the power efficiency profile of the Intel.