Intel Core i5 5200U 's Advantages
Lower TDP (15W vs 45W)
Intel Core i5 12500H 's Advantages
Released 7 years late
Higher specification of memory (5200 vs 1600)
Larger memory bandwidth (76.8GB/s vs 25.6GB/s)
Newer PCIe version (4.0 vs 2.0)
Higher base frequency (2.5GHz vs 2.2GHz)
Larger L3 cache size (18MB vs 3MB)
More modern manufacturing process (10nm vs 14nm)