Intel Core i9 12900HK 's Advantages
Higher base frequency (2.5GHz vs 1.2GHz)
Larger L3 cache size (24MB vs 18MB)
Intel Core Ultra 5 125H 's Advantages
Released 1 years and 11 months late
Better graphics card performance
Higher specification of memory (LPDDR5-7467 vs LPDDR5-5200)
Larger memory bandwidth (120GB/s vs 76.8GB/s)
Newer PCIe version (5.0 vs 4.0)
More modern manufacturing process (7nm vs 10nm)
Lower TDP (20W vs 35W)