Intel Core i5 8257U 's Advantages
Lower TDP (15W vs 54W)
AMD Ryzen 5 7640HS 's Advantages
Released 3 years and 9 months late
Better graphics card performance
Higher specification of memory (7500 vs 2400)
Larger memory bandwidth (89.6GB/s vs 37.5GB/s)
Newer PCIe version (4.0 vs 3.0)
Higher base frequency (4.3GHz vs 1.4GHz)
Larger L3 cache size (16MB vs 6MB)
More modern manufacturing process (4nm vs 14nm)