Intel Core i7 9750H 's Advantages
Higher base frequency (2.6GHz vs 2.5GHz)
Intel Core i9 12900HK 's Advantages
Released 2 years and 9 months late
Better graphics card performance
Higher specification of memory (5200 vs 2666)
Larger memory bandwidth (76.8GB/s vs 41.8GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (24MB vs 12MB)
More modern manufacturing process (10nm vs 14nm)