Intel Core i9 12900H 's Advantages
Better graphics card performance
Higher base frequency (2.5GHz vs 2.2GHz)
Lower TDP (45W vs 55W)
Intel Core i9 14900HX 's Advantages
Released 2 years late
Higher specification of memory (5600 vs 5200)
Larger memory bandwidth (89.6GB/s vs 76.8GB/s)
Newer PCIe version (5.0 vs 4.0)
Larger L3 cache size (36MB vs 24MB)