AMD Ryzen 5 3600X 's Advantages
Higher specification of memory (DDR4-3200 vs DDR4-2666)
Larger memory bandwidth (47.68GB/s vs 41.6GB/s)
Newer PCIe version (4.0 vs 3.0)
Higher base frequency (3.8GHz vs 3.1GHz)
Larger L3 cache size (32MB vs 16MB)
Intel Core i9 9900 's Advantages
Integrated graphics card
Lower TDP (65W vs 95W)