Intel Core i9 12900HX 's Advantages
Larger L3 cache size (30MB vs 24MB)
Intel Core Ultra 9 285HX 's Advantages
Released 2 years and 8 months late
Higher specification of memory (6400 vs 4800)
Larger memory bandwidth (102.4GB/s vs 76.8GB/s)
Newer PCIe version (5 vs 5.0)
Higher base frequency (2.8GHz vs 2.3GHz)
More modern manufacturing process (3nm vs 10nm)