Intel Core i5 9400H 's Advantages
Higher base frequency (2.5GHz vs 2.3GHz)
Lower TDP (45W vs 55W)
AMD Ryzen 9 7945HX3D 's Advantages
Released 4 years and 3 months late
Better graphics card performance
Higher specification of memory (5200 vs 2666)
Larger memory bandwidth (83.2GB/s vs 41.8GB/s)
Newer PCIe version (5 vs 3.0)
Larger L3 cache size (128MB vs 8MB)
More modern manufacturing process (5nm vs 14nm)