The AMD Ryzen 7 3800X is the objective winner of this comparison, securing victories in ten out of fourteen measured specifications. Its most significant technical advantage over the Intel Core i5-6600K is its L3 cache, which is 433% larger. This substantial increase in cache capacity provides the primary performance edge for the AMD processor across the evaluated metrics, establishing it as the superior component in this head-to-head matchup.

Users prioritizing raw performance and technical capability should choose the AMD Ryzen 7 3800X to leverage its massive L3 cache advantage. Conversely, the Intel Core i5-6600K remains a viable option for budget-conscious builders, as it holds a 39% advantage in MSRP. Selecting between these two processors depends on whether your primary requirement is the superior technical specification of the Ryzen or the lower initial cost offered by the Intel model.