Intel Core i7 8557U 's Advantages
Better graphics card performance
Lower TDP (15W vs 55W)
Intel Core i5 12450HX 's Advantages
Released 2 years and 10 months late
Higher specification of memory (4800 vs 2400)
Larger memory bandwidth (76.8GB/s vs 37.5GB/s)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (2.4GHz vs 1.7GHz)
Larger L3 cache size (12MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)