Intel Core i3 9300 's Advantages
Integrated graphics card
Higher base frequency (3.7GHz vs 3.5GHz)
Lower TDP (62W vs 105W)
AMD Ryzen 9 3950X 's Advantages
Released 7 months late
Higher specification of memory (3200 vs 2400)
Larger memory bandwidth (47.68GB/s vs 37.5GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (64MB vs 8MB)
More modern manufacturing process (7nm vs 14nm)