The Intel Core i9-12900K is the objective winner of this comparison, securing victory in nine out of fourteen measured specifications. Its most significant technical advantage is an 833% larger L2 cache compared to the Intel Core i7-8700K. While the older processor maintains a 61% lead in Max Turbo Power, the newer model’s substantial cache capacity provides a clear architectural superiority across the majority of the evaluated performance metrics.

Users prioritizing modern architecture and high-capacity cache should select the Intel Core i9-12900K for their build. Conversely, the Intel Core i7-8700K remains a viable option for those specifically seeking the higher Max Turbo Power rating provided by that unit. Choosing between these two components depends on whether your workload benefits more from the massive L2 cache expansion found in the newer model or the specific power profile of the older processor.