Intel Core i5 13420H 's Advantages
Newer PCIe version (5.0 vs 4.0)
AMD Ryzen 5 8640HS 's Advantages
Released 11 months late
Better graphics card performance
Higher specification of memory (7500 vs 5200)
Larger memory bandwidth (89.6GB/s vs 76.8GB/s)
Higher base frequency (3.5GHz vs 2.1GHz)
Larger L3 cache size (16MB vs 12MB)
More modern manufacturing process (4nm vs 10nm)
Lower TDP (28W vs 45W)