The AMD Ryzen 9 9900X3D is the objective winner of this comparison, securing nine spec victories against the three held by the AMD Ryzen 5 8500G. The most significant technical advantage for the winning processor is its L3 cache, which is 700% larger than that of its counterpart. This substantial difference in memory capacity provides the primary performance edge for the higher-tier model across the majority of the evaluated hardware specifications.

Users prioritizing raw technical capability and memory-intensive tasks should choose the AMD Ryzen 9 9900X3D to leverage its superior L3 cache. Conversely, the AMD Ryzen 5 8500G is the logical selection for budget-conscious buyers who prioritize cost efficiency, as it maintains a 70% advantage in MSRP. Selecting between these two components depends entirely on whether your primary requirement is the maximum cache capacity or the most favorable initial purchase price.