The Intel Core i5-14500 is the objective winner of this comparison, securing victories in nine out of fourteen measured specifications. Its most significant technical advantage is the L2 Cache, which is 1333% larger than that of the competing processor. This substantial increase in cache capacity provides the Intel Core i5-14500 with a clear architectural lead over the Intel Core i5-8400, which only outperformed its successor in three specific categories during the evaluation.

Users prioritizing high-performance computing should select the Intel Core i5-14500 to leverage its superior cache architecture. Conversely, the Intel Core i5-8400 remains a viable option for those specifically seeking a lower Max Turbo Power, as it holds a 58% advantage in that metric. Choosing between these two components depends on whether your primary requirement is the expanded cache capacity of the newer model or the power efficiency profile of the older unit.