The AMD Ryzen 9 7900X3D is the objective winner of this comparison, securing victory across nine of the fourteen measured specifications. Its most significant technical advantage is the L3 cache, which is 611% larger than that of the competing processor. This substantial increase in cache capacity serves as the primary differentiator between the two components, establishing the AMD Ryzen 9 7900X3D as the superior option in terms of raw hardware specifications.

Users prioritizing high-end performance should choose the AMD Ryzen 9 7900X3D to leverage its massive L3 cache advantage. Conversely, the Intel Core i5-12400 is the appropriate selection for budget-conscious buyers, as it holds a 68% advantage in MSRP. By weighing the necessity of cache capacity against the cost-efficiency of the Intel Core i5-12400, users can select the component that best aligns with their specific requirements for either performance or value.